42 Electrical switch & relay parts are listed for the 2020 Kia Optima, in 11 part types, covering all 4 engine options (1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged and 2.4L L4). Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2020 Kia Optima, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. Most of the listed parts are Oil Pressure Sender / Switch (10 parts), Power Window Switch (7 parts) and Brake Light Switch (6 parts). The other 8 part types cover the remaining 19 parts.
The 2020 Kia Optima was sold with 4 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
13 brands supply electrical switch & relay parts for the 2020 Kia Optima, led by WELLS (15 parts), STANDARD MOTOR PRODUCTS (7 parts) and VEMO (5 parts), plus 10 more brands. Quality grades include Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2020 Kia Optima. 7 parts have it, including FOUR SEASONS 37324 (A/C Refrigerant Pressure Switch) and WELLS 1R3545 (Accessory Power Relay). Each part number opens a page with every vehicle that part fits.
A/C Pressure Safety Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO Fits: 1.6L L4 Turbocharged, 2.0L L4 Turbocharged | V52730043 | 🇺🇸 US | Double Pipe IhxRefrigerator - Alternative | View on Amazon |
| VEMO Fits: 2.0L L4 ELECTRIC/GAS | V52730034 | 🇺🇸 US 🇨🇦 CA | Hybrid EX or Plug-In Hybrid EX | View on Amazon |
This table covers the A/C Pressure Safety switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
2 A/C Pressure Safety Switch parts for the 2020 Kia Optima come from VEMO.
Part numbers include VEMO V52730043 and VEMO V52730034.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS Popular Fits: 2.0L L4 ELECTRIC/GAS, 1.6L L4 Turbocharged, 2.0L L4 Turbocharged | 37324 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Switch | View on Amazon |
| HYUNDAI Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 97721D2000 | 🇺🇸 US | Included with suction tube, hose & tube assembly. | View on Amazon |
| HYUNDAI Fits: 2.0L L4 ELECTRIC/GAS | 977213K000 | 🇺🇸 US | Included with liquid line, suction tube, hose & tube assembly, pressure line assembly | View on Amazon |
| UAC Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | SW9969C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Transducer | View on Amazon |
| WELLS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1S9347 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the pressure switches on the A/C circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
5 A/C Refrigerant Pressure Switch parts are listed for the 2020 Kia Optima, from HYUNDAI, FOUR SEASONS, UAC and 1 other brand. FOUR SEASONS 37324 carries the "Popular" badge.
Listed part numbers: FOUR SEASONS 37324, HYUNDAI 97721D2000 and HYUNDAI 977213K000, plus the other parts above.
A/C Thermo Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD Fits: 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1712994 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the A/C Thermo switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
This group shows a single part: GPD 1712994.
Accessory Power Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Popular Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1R3545 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Gender: MaleMounting Hardware Included: No | View on Amazon |
| HYUNDAI Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 952302P020 | 🇺🇸 US | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | RY1850 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | In Engine Compartment | View on Amazon |
| WELLS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1R3525 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Voltage: 12.0 2H | View on Amazon |
| WELLS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1R2271 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 4 TerminalsSquare Type | View on Amazon |
This table covers the relays that control the Accessory Power circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
5 Accessory Power Relay parts for the 2020 Kia Optima come from 3 brands — WELLS, HYUNDAI and STANDARD MOTOR PRODUCTS. The "Popular" part is WELLS 1R3545.
Listed part numbers: WELLS 1R3545, HYUNDAI 952302P020 and STANDARD MOTOR PRODUCTS RY1850, plus the other parts above.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 2BLS0034 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 4 PIN | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | SLS534 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 4 Pin Terminals | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular Fits: 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged, 1.6L L4 Turbocharged | SLS605 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 6 Pin Terminals | View on Amazon |
| BECK/ARNLEY Fits: 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 2012739 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| VEMO Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | V52730054 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without metal Pad pedal type | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HYUNDAI Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 93810G8100 | 🇺🇸 US | View on Amazon |
This table covers the pedal-mounted switch that turns on the brake lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
6 Brake Light Switch parts are listed for the 2020 Kia Optima, from STANDARD MOTOR PRODUCTS, HOLSTEIN, BECK/ARNLEY and 2 other brands. STANDARD MOTOR PRODUCTS SLS534 carries the "Popular" badge.
In the Economy grade, HOLSTEIN supplies 1 part: the catalog's value-priced group. A representative part number is HOLSTEIN 2BLS0034.
The Standard Replacement section lists 4 options from STANDARD MOTOR PRODUCTS, BECK/ARNLEY and VEMO — built to original-equipment specification. STANDARD MOTOR PRODUCTS SLS534 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Listed part numbers: STANDARD MOTOR PRODUCTS SLS534, HOLSTEIN 2BLS0034 and STANDARD MOTOR PRODUCTS SLS605, plus the other parts above.
Ignition Starter Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1S17764 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Push Button Switch | View on Amazon |
This table covers the ignition switches that feed the starter circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
This group shows a single part: WELLS 1S17764.
Multi-Function Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1R3525 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Voltage: 12.0 2H | View on Amazon |
| WELLS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1R3545 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Gender: MaleMounting Hardware Included: No | View on Amazon |
| WELLS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1R2271 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 4 Blade TerminalsOmron Relay | View on Amazon |
This table covers the relays that control the Multi-Function circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
WELLS supplies the 3 Multi-Function Relay parts for the 2020 Kia Optima.
This group includes WELLS 1R3525, WELLS 1R3545 and WELLS 1R2271.
Neutral Safety Switch / Range Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO Fits: 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | V52730044 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Hybrid EX or Plug-In Hybrid EXor with Neutral Safety Switch | View on Amazon |
This table covers the Neutral Safety Switch / Range sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
One part is listed for the 2020 Kia Optima — VEMO V52730044.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 2OPS0001 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | PS411T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
| UNITED MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | OPS189 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light | View on Amazon |
| WALKER PRODUCTS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 2561059 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Popular Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 2011771 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | PS411 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Terminal Quantity: 1Terminal Type: Blade | View on Amazon |
| HELLA Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 009600251 | 🇺🇸 US 🇨🇦 CA | 1-Pin Connector | View on Amazon |
| ROSTRA Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 501242 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Hybrid EX or Plug-In Hybrid EX | View on Amazon |
| VEMO Fits: 2.0L L4 ELECTRIC/GAS | V53720147 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1S6857 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the senders and switches that report oil pressure to the gauge or lamp. Typical signs include a lamp that stays on, or a gauge that never moves. Confirm power and ground at the connector before replacing the sender or switch.
10 Oil Pressure Sender / Switch parts are listed for the 2020 Kia Optima, from STANDARD MOTOR PRODUCTS, HOLSTEIN, UNITED MOTOR PRODUCTS and 6 other brands. BECK/ARNLEY 2011771 carries the "Popular" badge.
Economy: 4 parts, from HOLSTEIN, STANDARD MOTOR PRODUCTS, UNITED MOTOR PRODUCTS and 1 other brand. A representative part number is HOLSTEIN 2OPS0001.
The Standard Replacement section: 6 options from BECK/ARNLEY, STANDARD MOTOR PRODUCTS, HELLA and 3 other brands. BECK/ARNLEY 2011771 is listed in this group.
Parking Brake Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | PBS144 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Parking Brake switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
One part is listed for the 2020 Kia Optima — STANDARD MOTOR PRODUCTS PBS144.
Power Window Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Popular Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1S16524 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Right | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | DWS2153 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Left | View on Amazon |
| WELLS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1S16479 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Leftwith Power Mirrors | View on Amazon |
| WELLS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1S16481 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Leftwithout Power Mirrors | View on Amazon |
| WELLS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1S16482 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Leftwithout Power Mirrors | View on Amazon |
| WELLS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1S16559 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rearwithout Heated Seats | View on Amazon |
| WELLS Fits: 1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged | 1S16560 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rearwith Heated Seats | View on Amazon |
This table covers the switches that command each window motor. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
7 Power Window Switch parts are listed for the 2020 Kia Optima, from WELLS and STANDARD MOTOR PRODUCTS. WELLS 1S16524 carries the "Popular" badge.
This group includes WELLS 1S16524, STANDARD MOTOR PRODUCTS DWS2153 and WELLS 1S16479 and the remaining parts above.
Buying Electrical Switch & Relay Parts for a 2020 Kia Optima
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Match the engine first. Every electrical switch & relay part here is 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, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Oil Pressure Sender / Switch and Power Window Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2020 Kia Optima?
Our catalog currently lists 42 electrical switch & relay parts for the 2020 Kia Optima across 11 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 switch & relay parts differ between 2020 Kia Optima engines?
Yes. Every electrical switch & relay part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. 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 switch & relay problems on a 2020 Kia Optima?
Common symptoms include accessories that work intermittently, a click without action, or one function dead while its fuse tests fine. 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, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
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 2020 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 2020 Kia Optima?
First match the engine — each row shows which engine(s) the part fits. Then swap a suspect relay with an identical known-good one from the fuse box before buying — it is the fastest diagnostic there is. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2020 Kia Optima
Electrical Switch & Relay 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.