The 2018 Kia Optima has 71 electrical connector parts with verified fitment on this page — 36 part types and 13 brands, covering all 4 engine options (1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged and 2.4L L4). Each part includes a manufacturer part number and application notes.
On the 2018 Kia Optima, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. Most of the listed parts are ABS Wheel Speed Sensor Connector (6 parts), Blower Motor Control Module / Resistor Connector (6 parts) and Knock / Detonation Sensor Connector (5 parts). The other 33 part types cover the remaining 54 parts.
The 2018 Kia Optima was sold with 4 engines. 44 parts fit every engine; the other 27 are engine-specific. Each part shows which engine(s) it fits.
13 brands supply electrical connector parts for the 2018 Kia Optima, led by STANDARD MOTOR PRODUCTS (42 parts), METRA (7 parts) and HOLSTEIN (6 parts), plus 10 more brands.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2018 Kia Optima. 4 parts have it, including HOLSTEIN 2ABS3157 (ABS Wheel Speed Sensor Connector) and STANDARD MOTOR PRODUCTS S1785 (Blower Motor Control Module / Resistor Connector). Each part number opens a page with every vehicle that part fits.
A/C Compressor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S3264 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the A/C Compressor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S3264.
A/C Refrigerant Pressure Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS Fits: all 2018 Optima engines | 37276 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 3 Terminal FemaleRectangular Connector | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S2458 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: OvalWire Gauge (GA): 18, 20 | View on Amazon |
| UNITED MOTOR PRODUCTS Fits: all 2018 Optima engines | CON205 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Low PressureCut-Off | View on Amazon |
This table covers the harness connectors at the A/C Refrigerant Pressure Switch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
3 A/C Refrigerant Pressure Switch Connector parts are listed for the 2018 Kia Optima, from FOUR SEASONS, STANDARD MOTOR PRODUCTS and UNITED MOTOR PRODUCTS. All of them fit every engine offered in the 2018 Optima.
Listed part numbers: FOUR SEASONS 37276, STANDARD MOTOR PRODUCTS S2458 and UNITED MOTOR PRODUCTS CON205.
ABS Wheel Speed Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Popular Fits: all 2018 Optima engines | 2ABS3157 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Leftwith Electronic Parking Brake | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular Fits: all 2018 Optima engines | S2962 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front | View on Amazon |
| HOLSTEIN Fits: all 2018 Optima engines | 2ABS4203 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Leftwithout Electric Parking Brake | View on Amazon |
| HOLSTEIN Fits: all 2018 Optima engines | 2ABS4212 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Rightwithout Electric Parking Brake | View on Amazon |
| HOLSTEIN Fits: all 2018 Optima engines | 2ABS3158 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes Harness | View on Amazon |
| WELLS Fits: 2.0L L4 ELECTRIC/GAS | 1P3873 | 🇺🇸 US 🇨🇦 CA | Rear LeftHybrid EX or Hybrid | View on Amazon |
This table covers the harness connectors at each ABS wheel-speed sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
6 ABS Wheel Speed Sensor Connector parts for the 2018 Kia Optima come from 3 brands — HOLSTEIN, STANDARD MOTOR PRODUCTS and WELLS. The "Popular" part is HOLSTEIN 2ABS3157. 5 parts fit every engine; the other 1 is engine-specific.
This group includes HOLSTEIN 2ABS3157, STANDARD MOTOR PRODUCTS S2962 and HOLSTEIN 2ABS4203 and the remaining parts above.
Accelerator Pedal Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S2815 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the Accelerator Pedal Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S2815.
Accessory Power Relay Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S1536 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: PolygonWire Gauge (GA): 8, 16 | View on Amazon |
This table covers the harness connectors at the Accessory Power Relay. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S1536.
Alternator / Generator Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S2533 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the Alternator / Generator. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S2533.
Ambient Air Temperature Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S2964 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: Oval | View on Amazon |
This table covers the harness connectors at the Ambient Air Temperature Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S2964.
Blower Motor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S3205 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the Blower Motor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S3205.
Blower Motor Control Module / Resistor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: all 2018 Optima engines | S1785 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: RectangleWiring Harness Length (In): 12.5 | View on Amazon |
| WELLS Popular Fits: 1.6L L4 Turbocharged, 2.0L L4 Turbocharged, 2.4L L4 | 1P1565 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Automatic Temperature Control | View on Amazon |
| DORMAN Fits: all 2018 Optima engines | 645320 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| FOUR SEASONS Fits: 1.6L L4 Turbocharged, 2.0L L4 Turbocharged, 2.4L L4 | 37260 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 4 Terminal Malewith Female Lock Tab | View on Amazon |
| HOLSTEIN Fits: all 2018 Optima engines | 2HAR0006 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Manual Air Conditioning | View on Amazon |
| UNITED MOTOR PRODUCTS Fits: all 2018 Optima engines | CON43 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Female Lock Tabwithout Automatic Temperature Control | View on Amazon |
This table covers the connectors at the blower resistor or control module. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
6 Blower Motor Control Module / Resistor Connector parts are listed for the 2018 Kia Optima, from STANDARD MOTOR PRODUCTS, WELLS, DORMAN and 3 other brands. STANDARD MOTOR PRODUCTS S1785 carries the "Popular" badge. 4 parts fit every engine; the other 2 are engine-specific.
Listed part numbers: STANDARD MOTOR PRODUCTS S1785, WELLS 1P1565 and DORMAN 645320, plus the other parts above.
Blower Motor Relay Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD Fits: 1.6L L4 Turbocharged, 2.0L L4 Turbocharged, 2.4L L4 | 1712189 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Blower Motor Resistor Pigtailwith 4 Terminal(s) | View on Amazon |
This table covers the harness connectors at the Blower Motor Relay. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Kia Optima — GPD 1712189.
Camshaft Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged, 2.4L L4 | S2438 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| ULTRA-POWER Fits: 1.6L L4 Turbocharged | 2701089 | 🇺🇸 US 🇨🇦 CA | Cam Position Sensor Connector | View on Amazon |
| WALKER PRODUCTS Fits: 1.6L L4 Turbocharged | 2701089 | 🇺🇸 US | View on Amazon |
This table covers the harness connectors at the Camshaft Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
3 Camshaft Position Sensor Connector parts for the 2018 Kia Optima come from 3 brands — STANDARD MOTOR PRODUCTS, ULTRA-POWER and WALKER PRODUCTS.
Part numbers include STANDARD MOTOR PRODUCTS S2438 and ULTRA-POWER 2701089, among others listed above.
Crankshaft Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged | S3064 | 🇺🇸 US | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged, 2.4L L4 | S1038 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: Rectangle | View on Amazon |
This table covers the harness connectors at the Crankshaft Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 Crankshaft Position Sensor Connector parts for the 2018 Kia Optima come from STANDARD MOTOR PRODUCTS.
This group includes STANDARD MOTOR PRODUCTS S3064 and STANDARD MOTOR PRODUCTS S1038.
EGR Valve Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | S2488 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the EGR Valve. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S2488.
Fuel Injection Pressure Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Fits: all 2018 Optima engines | 2HAR0060 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Located on Fuel Pump | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S2316 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: OvalNumber of Splice Connectors Included: 3 | View on Amazon |
This table covers the harness connectors at the Fuel Injection Pressure Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 Fuel Injection Pressure Sensor Connector parts for the 2018 Kia Optima come from 2 brands — HOLSTEIN and STANDARD MOTOR PRODUCTS. Every part fits all 4 engine options (1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged and 2.4L L4).
This group includes HOLSTEIN 2HAR0060 and STANDARD MOTOR PRODUCTS S2316.
Fuel Injector Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS | S2860 | 🇺🇸 US 🇨🇦 CA | Connector Shape: OvalGauge: 16 Gauge | View on Amazon |
This table covers the harness connectors at the Fuel Injector. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S2860.
Fuel Pump Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS | HP4325 | 🇺🇸 US 🇨🇦 CA | HandypackConnector Shape: Rectangle | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS | S1024 | 🇺🇸 US 🇨🇦 CA | Connector Shape: RectangleHarness Length | View on Amazon |
This table covers the harness connectors at the Fuel Pump. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 Fuel Pump Connector parts for the 2018 Kia Optima come from STANDARD MOTOR PRODUCTS.
Listed part numbers: STANDARD MOTOR PRODUCTS HP4325 and STANDARD MOTOR PRODUCTS S1024.
Fuel Sending Unit Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S2827 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the Fuel Sending Unit. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S2827.
Fuel Tank Pressure Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | S3121 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the Fuel Tank Pressure Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Kia Optima — STANDARD MOTOR PRODUCTS S3121.
Headlamp Wiring Harness / Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S3280 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 14 Terminal.with Green Connector | View on Amazon |
This table covers the wiring-harness connectors at the Headlamp. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.
One part is listed for the 2018 Kia Optima — STANDARD MOTOR PRODUCTS S3280.
Ignition Coil Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S2894 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the Ignition Coil. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S2894.
Knock / Detonation Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged, 2.4L L4 | PT2309 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged | HP4325 | 🇺🇸 US | HandypackConnector Shape: Rectangle | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged | S1024 | 🇺🇸 US | Connector Shape: RectangleHarness Length | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged, 2.4L L4 | HP4750 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | HandypackConnector Shape: Oval | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged, 2.4L L4 | S578 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: OvalGauge: 18 | View on Amazon |
This table covers the harness connectors at the Knock / Detonation Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
5 Knock / Detonation Sensor Connector parts for the 2018 Kia Optima come from 2 brands — STANDARD MOTOR PRODUCTS and ACDELCO.
Listed part numbers: ACDELCO PT2309, STANDARD MOTOR PRODUCTS HP4325 and STANDARD MOTOR PRODUCTS S1024, plus the other parts above.
Manifold Pressure (MAP) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS Fits: all 2018 Optima engines | 2701119 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the Manifold Pressure (MAP) Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: WALKER PRODUCTS 2701119.
Mass Air Flow (MAF) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS | S2900 | 🇺🇸 US 🇨🇦 CA | Connector Shape: Rectangular, N/A | View on Amazon |
This table covers the harness connectors at the Mass Air Flow (MAF) Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Kia Optima — STANDARD MOTOR PRODUCTS S2900.
Oil Pressure Sender / Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S3077 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the Oil Pressure Sender / Switch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Kia Optima — STANDARD MOTOR PRODUCTS S3077.
Oxygen (O2) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged | S3133 | 🇺🇸 US | Downstream Sensor | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S1419 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: OvalGender: Female | View on Amazon |
This table covers the harness connectors at the Oxygen (O2) Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 Oxygen (O2) Sensor Connector parts for the 2018 Kia Optima come from STANDARD MOTOR PRODUCTS. 1 part fits every engine; the other 1 is engine-specific.
Listed part numbers: STANDARD MOTOR PRODUCTS S3133 and STANDARD MOTOR PRODUCTS S1419.
Park Assist (PAS) Camera Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| METRA Fits: all 2018 Optima engines | AXHYKIACAM1 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Back-Up Camera Retention Harness | View on Amazon |
| METRA Fits: all 2018 Optima engines | AXHYKIACAM16V | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Back-Up Camera Harness | View on Amazon |
| METRA Fits: all 2018 Optima engines | AXHYKIACAM2 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Back-Up Camera Retention Harness | View on Amazon |
| METRA Fits: all 2018 Optima engines | AXHYKIACAM26V | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Back-Up Camera Harness | View on Amazon |
This table covers the harness connectors at the Park Assist (PAS) Camera. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
METRA supplies the 4 Park Assist (PAS) Camera Connector parts for the 2018 Kia Optima. All of them fit every engine offered in the 2018 Optima.
Part numbers include METRA AXHYKIACAM1, METRA AXHYKIACAM16V and METRA AXHYKIACAM2, among others listed above.
Parking Aid Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S3223 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear | View on Amazon |
This table covers the harness connectors at the Parking Aid Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S3223.
Radiator Fan Resistor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S3162 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Harness LengthCM: 37 | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S3326 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the Radiator Fan Resistor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 Radiator Fan Resistor Connector parts for the 2018 Kia Optima come from STANDARD MOTOR PRODUCTS. Every part fits all 4 engine options (1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged and 2.4L L4).
Part numbers include STANDARD MOTOR PRODUCTS S3162 and STANDARD MOTOR PRODUCTS S3326.
Radio Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| METRA Fits: all 2018 Optima engines | AXUSBHK2 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | USB Adapter Cable Harness | View on Amazon |
| METRA Fits: all 2018 Optima engines | 707306 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Radio Wire HarnessFor Aftermarket Radio | View on Amazon |
| METRA Fits: all 2018 Optima engines | 717306 | 🇺🇸 US 🇨🇦 CA | To Radiowith 7-inch touchscreen | View on Amazon |
This table covers the harness connectors at the Radio. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
METRA supplies the 3 Radio Connector parts for the 2018 Kia Optima. All of them fit every engine offered in the 2018 Optima.
Part numbers include METRA AXUSBHK2, METRA 707306 and METRA 717306.
Temperature Sender / Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | S3094 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 3 Blade Terminals | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged, 2.4L L4 | S3099 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 4 Blade Terminals | View on Amazon |
This table covers the harness connectors at the Temperature Sender / Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 Temperature Sender / Sensor Connector parts for the 2018 Kia Optima come from STANDARD MOTOR PRODUCTS.
This group includes STANDARD MOTOR PRODUCTS S3094 and STANDARD MOTOR PRODUCTS S3099.
Throttle Control Actuator Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged | S2817 | 🇺🇸 US | View on Amazon |
This table covers the harness connectors at the Throttle Control Actuator. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S2817.
Trailer Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT Fits: all 2018 Optima engines | 56314 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Custom Wiring Harness4-Way Flat | View on Amazon |
| TEKONSHA Fits: all 2018 Optima engines | 118453 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-One Connector Assemblywith Upgraded Converter | View on Amazon |
This table covers the trailer-lighting connectors at the hitch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 Trailer Connector parts are listed for the 2018 Kia Optima, from CURT and TEKONSHA. All of them fit every engine offered in the 2018 Optima.
This group includes CURT 56314 and TEKONSHA 118453.
Vapor Canister Purge Valve / Solenoid Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | HP4625 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | HandypackTerminal Type: Blade Terminals | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S1350 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Length (In): 1.125Terminal Type: Blade Terminals | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S1414 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: RectangleTerminal Type: Blade | View on Amazon |
This table covers the harness connectors at the Vapor Canister Purge Valve / Solenoid. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
3 Vapor Canister Purge Valve / Solenoid Connector parts for the 2018 Kia Optima come from STANDARD MOTOR PRODUCTS. Every part fits all 4 engine options (1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged and 2.4L L4).
Part numbers include STANDARD MOTOR PRODUCTS HP4625, STANDARD MOTOR PRODUCTS S1350 and STANDARD MOTOR PRODUCTS S1414.
Vapor Canister Vent Valve / Solenoid Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | HP4625 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | HandypackTerminal Type: Blade Terminals | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S1350 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Length (In): 1.125Terminal Type: Blade Terminals | View on Amazon |
This table covers the harness connectors at the Vapor Canister Vent Valve / Solenoid. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 Vapor Canister Vent Valve / Solenoid Connector parts for the 2018 Kia Optima come from STANDARD MOTOR PRODUCTS. Every part fits all 4 engine options (1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged and 2.4L L4).
This group includes STANDARD MOTOR PRODUCTS HP4625 and STANDARD MOTOR PRODUCTS S1350.
Variable Valve Timing (VVT) Solenoid Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged, 2.4L L4 | S1716 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: OvalWire Gauge (GA): 14 | View on Amazon |
| WALKER PRODUCTS Fits: 1.6L L4 Turbocharged, 2.0L L4 Turbocharged, 2.4L L4 | 2701102 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Incl.Oil Control Valve | View on Amazon |
| WALKER PRODUCTS Fits: 2.0L L4 ELECTRIC/GAS | 2101501 | 🇺🇸 US 🇨🇦 CA | Incl.Oil Control ValveExhaust | View on Amazon |
This table covers the harness connectors at the Variable Valve Timing (VVT) Solenoid. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
3 Variable Valve Timing (VVT) Solenoid Connector parts for the 2018 Kia Optima come from 2 brands — WALKER PRODUCTS and STANDARD MOTOR PRODUCTS.
Part numbers include STANDARD MOTOR PRODUCTS S1716, WALKER PRODUCTS 2701102 and WALKER PRODUCTS 2101501.
Washer Pump Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2018 Optima engines | S1530 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: OvalHarness Length | View on Amazon |
This table covers the harness connectors at the Washer Pump. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S1530.
Buying Electrical Connector Parts for a 2018 Kia Optima
On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.
- Match the engine first. Some electrical connector parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: ABS Wheel Speed Sensor Connector and Blower Motor Control Module / Resistor Connector .
Frequently Asked Questions
How many electrical connector parts fit the 2018 Kia Optima?
Our catalog currently lists 71 electrical connector parts for the 2018 Kia Optima across 36 subcategories and 13 brands, covering all 4 engine options (1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged and 2.4L L4). Each part is matched to the engine(s) it fits.
Do electrical connector parts differ between 2018 Kia Optima engines?
Some do. 44 parts fit every engine; the other 27 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical connector problems on a 2018 Kia Optima?
Common symptoms include intermittent faults that move when the harness is wiggled, green corrosion inside a plug, or melted connector housings near heat sources. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2018 Kia Optima was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2018 Kia Optima?
First match the engine — each row shows which engine(s) the part fits. Then match the connector by terminal count and keyway, not just appearance — many families look identical but will not lock. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2018 Kia Optima
Electrical Connector Parts for Other Kia Optima Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.