This page lists 37 electrical connector parts for the 2021 Toyota Corolla, across 26 part types, covering all 3 engine options (1.8L L4, 1.8L L4 ELECTRIC/GAS and 2.0L L4). Every part shows its brand, manufacturer part number and fitment notes.
On the 2021 Toyota Corolla, 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 Trailer Connector (4 parts), ABS Wheel Speed Sensor Connector (3 parts) and Manifold Pressure (MAP) Sensor Connector (3 parts). The other 23 part types cover the remaining 27 parts.
The 2021 Toyota Corolla was sold with 3 engines. 21 parts fit every engine; the other 16 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2021 Toyota Corolla electrical connector parts are STANDARD MOTOR PRODUCTS (25 parts), METRA (3 parts) and WALKER PRODUCTS (2 parts), plus 5 more brands.
Each part number listed for the 2021 Toyota Corolla 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 Corolla engines | S1530 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: OvalHarness Length | 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 Toyota Corolla — STANDARD MOTOR PRODUCTS S1530.
ABS Wheel Speed Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla engines | S2826 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes ABS Wheel Speed Sensor Wire Harness | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.8L L4, 1.8L L4 ELECTRIC/GAS | ALH115 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear LeftFor vehicle built in Japan | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.8L L4, 1.8L L4 ELECTRIC/GAS | ALH120 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear RightFor vehicle built in Japan | 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.
STANDARD MOTOR PRODUCTS supplies the 3 ABS Wheel Speed Sensor Connector parts for the 2021 Toyota Corolla. 1 part fits every engine; the other 2 are engine-specific.
Part numbers include STANDARD MOTOR PRODUCTS S2826, STANDARD MOTOR PRODUCTS ALH115 and STANDARD MOTOR PRODUCTS ALH120.
Accelerator Pedal Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla 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.
One part is listed for the 2021 Toyota Corolla — STANDARD MOTOR PRODUCTS S2815.
Ambient Air Temperature Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla engines | S2825 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Harness Lengthinches: 12.5 | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla engines | S986 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Centered Index Slot | 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.
STANDARD MOTOR PRODUCTS supplies both parts for the 2021 Toyota Corolla. All of them fit every engine offered in the 2021 Corolla.
Listed part numbers: STANDARD MOTOR PRODUCTS S2825 and STANDARD MOTOR PRODUCTS S986.
Blower Motor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla engines | S3208 | 🇺🇸 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 Toyota Corolla — STANDARD MOTOR PRODUCTS S3208.
Camshaft Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.8L L4, 1.8L L4 ELECTRIC/GAS | S2837 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
One part is listed for the 2021 Toyota Corolla — STANDARD MOTOR PRODUCTS S2837.
Fuel Injector Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GB REMANUFACTURING Fits: 1.8L L4, 1.8L L4 ELECTRIC/GAS | 5188 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | L Model or LE Model or XLE Model | 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 Toyota Corolla — GB REMANUFACTURING 5188.
HVAC Control Switch / Panel Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD Fits: all 2021 Corolla engines | 1713413 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the HVAC Control Switch / Panel. 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 Toyota Corolla — GPD 1713413.
Ignition Coil Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla engines | S2438 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WALKER PRODUCTS Fits: 1.8L L4 ELECTRIC/GAS | 2701082 | 🇺🇸 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.
2 Ignition Coil Connector parts are listed for the 2021 Toyota Corolla, from STANDARD MOTOR PRODUCTS and WALKER PRODUCTS. 1 part fits every engine; the other 1 is engine-specific.
Part numbers include STANDARD MOTOR PRODUCTS S2438 and WALKER PRODUCTS 2701082.
Knock / Detonation Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla engines | S2328 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: Rectangular, OvalTerminal Quantity: 2 | 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.
One part is listed for the 2021 Toyota Corolla — STANDARD MOTOR PRODUCTS S2328.
License Plate Lamp Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 | S1716 | 🇺🇸 US 🇨🇦 CA | Connector Shape: OvalWire Gauge (GA): 14 | View on Amazon |
This table covers the harness connectors at the License Plate Lamp. 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 S1716.
Manifold Pressure (MAP) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla engines | S1028 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Gender: Female | View on Amazon |
| ULTRA-POWER Fits: 1.8L L4, 1.8L L4 ELECTRIC/GAS | 2701088 | 🇺🇸 US 🇨🇦 CA | Manifold Absolute Pressure Sensor ConnectorMANIFOLD VACUUM SENSOR | View on Amazon |
| WALKER PRODUCTS Fits: 1.8L L4, 1.8L L4 ELECTRIC/GAS | 2701088 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Manifold Vacuum Sensor | 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.
3 Manifold Pressure (MAP) Sensor Connector parts are listed for the 2021 Toyota Corolla, from STANDARD MOTOR PRODUCTS, ULTRA-POWER and WALKER PRODUCTS. 1 part fits every engine; the other 2 are engine-specific.
Part numbers include STANDARD MOTOR PRODUCTS S1028 and ULTRA-POWER 2701088, among others listed above.
Mass Air Flow (MAF) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.8L L4, 1.8L L4 ELECTRIC/GAS | S3313 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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 S3313.
Park Assist (PAS) Camera Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| METRA Fits: all 2021 Corolla engines | AXDSPXTY3 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Camera Add-On Package | 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.
This group shows a single part: METRA AXDSPXTY3.
Parking / Turn Signal Lamp Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla engines | S2537 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front | View on Amazon |
This table covers the harness connectors at the Parking / Turn Signal Lamp. 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 Toyota Corolla — STANDARD MOTOR PRODUCTS S2537.
Radiator Fan Resistor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla engines | S3314 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 3 Blade Terminals | 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.
One part is listed for the 2021 Toyota Corolla — STANDARD MOTOR PRODUCTS S3314.
Radio Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| METRA Fits: all 2021 Corolla engines | AXSWCHT28 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Plug And Play Harness | View on Amazon |
| METRA Fits: all 2021 Corolla engines | 711765 | 🇺🇸 US 🇨🇦 CA | To radioNon-Amplified | 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 Toyota Corolla come from METRA. Every part fits all 3 engine options (1.8L L4, 1.8L L4 ELECTRIC/GAS and 2.0L L4).
Part numbers include METRA AXSWCHT28 and METRA 711765.
Side Marker Lamp Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla engines | S1530 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: OvalHarness Length | View on Amazon |
This table covers the harness connectors at the Side Marker Lamp. 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.
Starter Solenoid Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.8L L4, 1.8L L4 ELECTRIC/GAS | S2549 | 🇺🇸 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 Toyota Corolla — STANDARD MOTOR PRODUCTS S2549.
Temperature Sender / Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.8L L4 | S1923 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: RectangleWiring Harness Length (mm): 508 | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 | S3203 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
STANDARD MOTOR PRODUCTS supplies both parts for the 2021 Toyota Corolla.
Listed part numbers: STANDARD MOTOR PRODUCTS S1923 and STANDARD MOTOR PRODUCTS S3203.
Throttle Control Actuator Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.8L L4, 1.8L L4 ELECTRIC/GAS | 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 Toyota Corolla — STANDARD MOTOR PRODUCTS S2817.
Trailer Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT Fits: all 2021 Corolla engines | 56454 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | L Model or LE Model or XLE Model4-Way | View on Amazon |
| CURT Fits: 2.0L L4 | 56309 | 🇺🇸 US 🇨🇦 CA | Custom Wiring Harness4-Way Flat | View on Amazon |
| TEKONSHA Fits: all 2021 Corolla engines | 118810 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-One Connector Assemblywith Upgraded Circuit Protected Modu Lite HD Module | View on Amazon |
| TEKONSHA Fits: 2.0L L4 | 118729 | 🇺🇸 US 🇨🇦 CA | 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.
4 Trailer Connector parts for the 2021 Toyota Corolla come from 2 brands — CURT and TEKONSHA. 2 parts fit every engine; the other 2 are engine-specific.
Listed part numbers: CURT 56454, CURT 56309 and TEKONSHA 118810, plus the other parts above.
Turn Signal Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla engines | S2539 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front | View on Amazon |
This table covers the harness connectors at the Turn Signal 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 S2539.
Vapor Leak Detection Pump Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla engines | S2818 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Gauge: 20 Gauge | View on Amazon |
This table covers the harness connectors at the Vapor Leak Detection 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 Toyota Corolla — STANDARD MOTOR PRODUCTS S2818.
Variable Valve Timing (VVT) Solenoid Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.8L L4, 1.8L L4 ELECTRIC/GAS | S1716 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: OvalWire Gauge (GA): 14 | 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.
One part is listed for the 2021 Toyota Corolla — STANDARD MOTOR PRODUCTS S1716.
Washer Pump Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 Corolla 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.
One part is listed for the 2021 Toyota Corolla — STANDARD MOTOR PRODUCTS S1530.
Buying Electrical Connector Parts for a 2021 Toyota Corolla
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: Trailer Connector and ABS Wheel Speed Sensor Connector .
Frequently Asked Questions
How many electrical connector parts fit the 2021 Toyota Corolla?
Our catalog currently lists 37 electrical connector parts for the 2021 Toyota Corolla across 26 subcategories and 8 brands, covering all 3 engine options (1.8L L4, 1.8L L4 ELECTRIC/GAS and 2.0L L4). Each part is matched to the engine(s) it fits.
Do electrical connector parts differ between 2021 Toyota Corolla engines?
Some do. 21 parts fit every engine; the other 16 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 Toyota Corolla?
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 Toyota Corolla 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 Toyota Corolla?
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 Toyota Corolla
Electrical Connector Parts for Other Toyota Corolla Years
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