This page lists 16 electrical connector parts for the 2021 Kia Niro, across 11 part types, covering both the 1.6L L4 ELECTRIC/GAS and the ELECTRIC. Every part shows its brand, manufacturer part number and fitment notes.
On the 2021 Kia Niro, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. 7 parts of the 16 listed are Brake Fluid Level Sensor Connector (3 parts), Fuel Injection Pressure Sensor Connector (2 parts) and Trailer Connector (2 parts). The other 8 part types cover the remaining 9 parts.
The 2021 Kia Niro was sold with both the 1.6L L4 ELECTRIC/GAS and the ELECTRIC. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
6 brands supply electrical connector parts for the 2021 Kia Niro, led by STANDARD MOTOR PRODUCTS (11 parts), ACDELCO (1 part) and HOLSTEIN (1 part), plus 3 more brands.
Each part number listed for the 2021 Kia Niro opens a page with every vehicle that part fits.
Brake Fluid Level Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 1.6L L4 ELECTRIC/GAS | PT2164 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 ELECTRIC/GAS | HP3860 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | HandypackTerminal Type: Blade | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 ELECTRIC/GAS | S697 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: RectangleHarness Length | View on Amazon |
This table covers the harness connectors at the Brake Fluid Level 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 Brake Fluid Level Sensor Connector parts are listed for the 2021 Kia Niro, from STANDARD MOTOR PRODUCTS and ACDELCO.
This group includes ACDELCO PT2164, STANDARD MOTOR PRODUCTS HP3860 and STANDARD MOTOR PRODUCTS S697.
Fuel Injection Pressure Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Fits: 1.6L L4 ELECTRIC/GAS | 2HAR0060 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Located on Fuel Pump | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 ELECTRIC/GAS | 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 2021 Kia Niro come from 2 brands — HOLSTEIN and STANDARD MOTOR PRODUCTS.
Part numbers include HOLSTEIN 2HAR0060 and STANDARD MOTOR PRODUCTS S2316.
Fuel Tank Pressure Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 ELECTRIC/GAS | 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 2021 Kia Niro — STANDARD MOTOR PRODUCTS S3121.
Ignition Coil Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 ELECTRIC/GAS | 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.
Mass Air Flow (MAF) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 ELECTRIC/GAS | S2900 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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 2021 Kia Niro — STANDARD MOTOR PRODUCTS S2900.
Oxygen (O2) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 ELECTRIC/GAS | S3133 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Downstream Sensor | 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S3133.
Radiator Fan Motor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 ELECTRIC/GAS | S3162 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Harness LengthCM: 37 | View on Amazon |
This table covers the harness connectors at the Radiator Fan 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 S3162.
Radio Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| METRA Fits: 1.6L L4 ELECTRIC/GAS | AXUSBHK2 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | USB Adapter Cable Harness | 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.
One part is listed for the 2021 Kia Niro — METRA AXUSBHK2.
Trailer Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT Fits: 1.6L L4 ELECTRIC/GAS | 56376 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Custom Wiring Harness4-Way Flat | View on Amazon |
| TEKONSHA Fits: 1.6L L4 ELECTRIC/GAS | 118749 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-One Connector Assemblywith Upgraded Circuit Protected Modu Lite HD Module | 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 2021 Kia Niro, from CURT and TEKONSHA.
This group includes CURT 56376 and TEKONSHA 118749.
Vapor Canister Purge Valve / Solenoid Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 ELECTRIC/GAS | HP4625 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | HandypackTerminal Type: Blade Terminals | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 ELECTRIC/GAS | S1350 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Length (In): 1.125Terminal Type: Blade Terminals | 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.
2 Vapor Canister Purge Valve / Solenoid Connector parts for the 2021 Kia Niro come from STANDARD MOTOR PRODUCTS.
This group includes STANDARD MOTOR PRODUCTS HP4625 and STANDARD MOTOR PRODUCTS S1350.
Washer Pump Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 ELECTRIC/GAS | S3131 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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 S3131.
Buying Electrical Connector Parts for a 2021 Kia Niro
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. Every electrical connector 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, 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: Brake Fluid Level Sensor Connector and Fuel Injection Pressure Sensor Connector .
Frequently Asked Questions
How many electrical connector parts fit the 2021 Kia Niro?
Our catalog currently lists 16 electrical connector parts for the 2021 Kia Niro across 11 subcategories and 6 brands, covering both the 1.6L L4 ELECTRIC/GAS and the ELECTRIC. Each part is matched to the engine(s) it fits.
Do electrical connector parts differ between 2021 Kia Niro engines?
Yes. Every electrical connector 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 connector problems on a 2021 Kia Niro?
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 2021 Kia Niro 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 2021 Kia Niro?
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 2021 Kia Niro
Electrical Connector Parts for Other Kia Niro 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.