The 2021 Honda Civic has 25 electrical connector parts with verified fitment on this page — 23 part types and 5 brands, covering all 3 engine options (1.5L L4 Turbocharged, 2.0L L4 and 2.0L L4 Turbocharged). Each part includes a manufacturer part number and application notes.
On the 2021 Honda Civic, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. 5 parts of the 25 listed are Radio Connector (2 parts), Trailer Connector (2 parts) and A/C Compressor Connector (1 part). The other 20 part types cover the remaining 20 parts.
The 2021 Honda Civic was sold with 3 engines. 19 parts fit every engine; the other 6 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2021 Honda Civic electrical connector parts are STANDARD MOTOR PRODUCTS (19 parts), METRA (2 parts) and CURT (2 parts), plus 2 more brands.
Each part number listed for the 2021 Honda Civic opens a page with every vehicle that part fits.
A/C Compressor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S2865 | 🇺🇸 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.
One part is listed for the 2021 Honda Civic — STANDARD MOTOR PRODUCTS S2865.
Accelerator Pedal Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S2461 | 🇺🇸 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.
One part is listed for the 2021 Honda Civic — STANDARD MOTOR PRODUCTS S2461.
Air Bag Clockspring Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 Civic engines | 645108 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | EX Model or EX-L Model or LX Model or Sport or Touring | View on Amazon |
This table covers the harness connectors at the Air Bag Clockspring. 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: DORMAN 645108.
Air Intake / Charge Temperature Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.5L L4 Turbocharged | S2850 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Harness Lengthinches: 13 | View on Amazon |
This table covers the harness connectors at the Air Intake / Charge 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 S2850.
Ambient Air Temperature Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S2850 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Harness Lengthinches: 13 | 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.
One part is listed for the 2021 Honda Civic — STANDARD MOTOR PRODUCTS S2850.
Back Up / Reverse Lamp Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S3086 | 🇺🇸 US 🇨🇦 CA | Manual trans. | View on Amazon |
This table covers the harness connectors at the Back Up / Reverse Lamp 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S3086.
Battery Current Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S1686 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: OvalBlack | View on Amazon |
This table covers the harness connectors at the Battery Current 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 Honda Civic — STANDARD MOTOR PRODUCTS S1686.
Blower Motor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S3204 | 🇺🇸 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.
One part is listed for the 2021 Honda Civic — STANDARD MOTOR PRODUCTS S3204.
Crankshaft Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.5L L4 Turbocharged | S2865 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
One part is listed for the 2021 Honda Civic — STANDARD MOTOR PRODUCTS S2865.
Fuel Injector Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.5L L4 Turbocharged | S2850 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Harness Lengthinches: 13 | 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.
One part is listed for the 2021 Honda Civic — STANDARD MOTOR PRODUCTS S2850.
Headlamp Wiring Harness / Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S3306 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S3306.
Ignition Coil Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S2935 | 🇺🇸 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.
One part is listed for the 2021 Honda Civic — STANDARD MOTOR PRODUCTS S2935.
Manifold Pressure (MAP) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S2865 | 🇺🇸 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.
One part is listed for the 2021 Honda Civic — STANDARD MOTOR PRODUCTS S2865.
Mass Air Flow (MAF) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S3120 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 5 Blade Terminals | 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S3120.
Oil Pressure Sender / Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S2865 | 🇺🇸 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S2865.
Parking Brake Actuator Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S3239 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits RearHatchbackor Sedan | View on Amazon |
This table covers the harness connectors at the Parking Brake 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.
One part is listed for the 2021 Honda Civic — STANDARD MOTOR PRODUCTS S3239.
Radio Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| METRA Fits: 1.5L L4 Turbocharged, 2.0L L4 | 711731 | 🇺🇸 US 🇨🇦 CA | To RadioLX | View on Amazon |
| METRA Fits: all 2021 Civic engines | AXSPHN | 🇺🇸 US 🇨🇦 CA | To CarExc. LX | 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.
2 Radio Connector parts for the 2021 Honda Civic come from METRA. 1 part fits every engine; the other 1 is engine-specific.
Listed part numbers: METRA 711731 and METRA AXSPHN.
Starter Solenoid Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S2803 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the Starter 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.
One part is listed for the 2021 Honda Civic — STANDARD MOTOR PRODUCTS S2803.
Temperature Sender / Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S2850 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Harness Lengthinches: 13 | 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.
One part is listed for the 2021 Honda Civic — STANDARD MOTOR PRODUCTS S2850.
Throttle Control Actuator Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S2817 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
One part is listed for the 2021 Honda Civic — STANDARD MOTOR PRODUCTS S2817.
Trailer Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT Fits: 1.5L L4 Turbocharged, 2.0L L4 | 56396 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Custom Wiring Harness4-Way Flat | View on Amazon |
| TEKONSHA Fits: 1.5L L4 Turbocharged, 2.0L L4 | 118859 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-One Connector Assembly | 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 for the 2021 Honda Civic come from 2 brands — CURT and TEKONSHA.
Listed part numbers: CURT 56396 and TEKONSHA 118859.
Trailer Wire Converter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT Fits: all 2021 Civic engines | 56236 | 🇺🇸 US 🇨🇦 CA | Multi-Function Taillight ConverterConverts 2-Wire/3-Wire/PWM Stop/Turn System To 2-Wire Trailer Light Wiring | View on Amazon |
This table covers the Trailer Wire converters. Typical signs include a sulfur smell, rattling substrate, or an efficiency code. Confirm CARB vs Federal certification in the notes before ordering.
This group shows a single part: CURT 56236.
Washer Pump Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Civic engines | S2896 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Gender: MaleTerminal Type: Blade | 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.
One part is listed for the 2021 Honda Civic — STANDARD MOTOR PRODUCTS S2896.
Buying Electrical Connector Parts for a 2021 Honda Civic
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: Radio Connector and Trailer Connector .
Frequently Asked Questions
How many electrical connector parts fit the 2021 Honda Civic?
Our catalog currently lists 25 electrical connector parts for the 2021 Honda Civic across 23 subcategories and 5 brands, covering all 3 engine options (1.5L L4 Turbocharged, 2.0L L4 and 2.0L L4 Turbocharged). Each part is matched to the engine(s) it fits.
Do electrical connector parts differ between 2021 Honda Civic engines?
Some do. 19 parts fit every engine; the other 6 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 2021 Honda Civic?
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 Honda Civic 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 Honda Civic?
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 Honda Civic
Electrical Connector Parts for Other Honda Civic Years
Switch vehicle or jump to a subcategory
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.