The 2021 Toyota Sequoia has 48 electrical connector parts with verified fitment on this page — 25 part types and 6 brands, covering the 5.7L V8 engine. Each part includes a manufacturer part number and application notes.
The connector system on the 2021 Toyota Sequoia supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. The largest groups are Trailer Connector (13 parts), ABS Wheel Speed Sensor Connector (4 parts) and Ignition Coil Connector (4 parts). The other 22 part types cover the remaining 27 parts.
The 2021 Toyota Sequoia came with a single engine, the 5.7L V8, and every part is verified against it.
6 brands supply electrical connector parts for the 2021 Toyota Sequoia, led by STANDARD MOTOR PRODUCTS (24 parts), CURT (15 parts) and HOLSTEIN (4 parts), plus 3 more brands.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Toyota Sequoia. 3 parts have it, including CURT 55415 (Trailer Connector) and CURT 56229 (Trailer 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 | S2539 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 3 Female Terminals | 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 S2539.
ABS Wheel Speed Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2ABS4843 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Right | View on Amazon |
| HOLSTEIN | 2ABS4846 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Right | View on Amazon |
| HOLSTEIN | 2ABS4847 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Left | View on Amazon |
| HOLSTEIN | 2ABS4844 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Left | 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.
4 ABS Wheel Speed Sensor Connector parts for the 2021 Toyota Sequoia come from HOLSTEIN.
Part numbers include HOLSTEIN 2ABS4843, HOLSTEIN 2ABS4846 and HOLSTEIN 2ABS4847, among others listed above.
Accelerator Pedal Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | 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.
Alternator / Generator Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S2548 | 🇺🇸 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 S2548.
Blower Motor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S3204 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rearwith 2 Terminal(s) | View on Amazon |
| STANDARD MOTOR PRODUCTS | S3208 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Frontwith 3 Blade Terminals | 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.
2 Blower Motor Connector parts for the 2021 Toyota Sequoia come from STANDARD MOTOR PRODUCTS.
Part numbers include STANDARD MOTOR PRODUCTS S3204 and STANDARD MOTOR PRODUCTS S3208.
Camshaft Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S2837.
Ignition Coil Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S3291 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Housing | View on Amazon |
| STANDARD MOTOR PRODUCTS | S2527 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Complete Assembly | View on Amazon |
| UNITED MOTOR PRODUCTS | CON208 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WALKER PRODUCTS | 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.
4 Ignition Coil Connector parts for the 2021 Toyota Sequoia come from 3 brands — STANDARD MOTOR PRODUCTS, UNITED MOTOR PRODUCTS and WALKER PRODUCTS.
Part numbers include STANDARD MOTOR PRODUCTS S3291, STANDARD MOTOR PRODUCTS S2527 and UNITED MOTOR PRODUCTS CON208, among others listed above.
Knock / Detonation Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S2328 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: Rectangular, OvalTerminal Quantity: 2 | View on Amazon |
| STANDARD MOTOR PRODUCTS | S2918 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Terminal Quantity: 82 | 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.
2 Knock / Detonation Sensor Connector parts for the 2021 Toyota Sequoia come from STANDARD MOTOR PRODUCTS.
This group includes STANDARD MOTOR PRODUCTS S2328 and STANDARD MOTOR PRODUCTS S2918.
Mass Air Flow (MAF) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S1712 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: Oval | 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 Toyota Sequoia — STANDARD MOTOR PRODUCTS S1712.
Oxygen (O2) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S1804 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Downstream SensorColor Code Black and White | 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 S1804.
Park Assist (PAS) Camera Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| METRA | 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.
One part is listed for the 2021 Toyota Sequoia — METRA AXDSPXTY3.
Parking / Turn Signal Lamp Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S2537.
Radio Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| METRA | AXSWCHT28 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Plug And Play Harness | View on Amazon |
| METRA | 711765 | 🇺🇸 US 🇨🇦 CA | Fits To Radiowith charcoal high gloss color dash | 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 both parts for the 2021 Toyota Sequoia.
Listed part numbers: METRA AXSWCHT28 and METRA 711765.
Starter Solenoid Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S2549.
Temperature Sender / Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | HP4665 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Handypack | View on Amazon |
| STANDARD MOTOR PRODUCTS | S2034 | 🇺🇸 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.
2 Temperature Sender / Sensor Connector parts for the 2021 Toyota Sequoia come from STANDARD MOTOR PRODUCTS.
Part numbers include STANDARD MOTOR PRODUCTS HP4665 and STANDARD MOTOR PRODUCTS S2034.
Throttle Control Actuator Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S2817.
Trailer Adapter Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT | 57101 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 7-Way Round RV To 4-Way Flat Adapter | View on Amazon |
This table covers the harness connectors at the Trailer Adapter. 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: CURT 57101.
Trailer Brake Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT | 51362 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Brake Control Adapter HarnessIncludes OEM Connector, 2 ft. Wire, Protective Sleeve, and 12 Gauge Wire | View on Amazon |
| CURT | 51363 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Brake Control Adapter HarnessIncludes OEM Connector, 2 ft. Wire, Protective Sleeve, and 12 Gauge Wire | View on Amazon |
This table covers the harness connectors at the Trailer Brake 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.
2 Trailer Brake Switch Connector parts for the 2021 Toyota Sequoia come from CURT.
This group includes CURT 51362 and CURT 51363.
Trailer Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT Popular | 55415 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Replacement 7-Way RV Blade OEM Socket | View on Amazon |
| CURT Popular | 56229 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 7-Way USCAR Electrical ConnectorLength: 24 in. | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular | TC656 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Towing PackageOE Style | View on Amazon |
| CURT | 55416 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Heavy Duty Replacement OEM 7-Way RV Blade SocketPlugs Into USCAR Socket | View on Amazon |
| CURT | 56415 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Replacement 7-Way RV Blade OEM SocketTwist-In | View on Amazon |
| CURT | 55515 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Custom Wiring ConnectorOE 4-Way Flat | View on Amazon |
| CURT | 56515 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Custom Wiring Connector5-Way Flat | View on Amazon |
| CURT | 57015 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OEM Replacement Dual-Output 7 and 4 Way ConnectorPlugs Into USCAR Socket | View on Amazon |
| CURT | 55384 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Custom Wiring Connector4-Way Flat | View on Amazon |
| CURT | 57020 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OEM Replacement Dual-Output 7 and 4 Way ConnectorPackaged | View on Amazon |
| CURT | 55774 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OEM Vehicle to Trailer Connector with Harness7-Way and 4-Way | View on Amazon |
| CURT | 56584 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Custom Wiring Harness5-Way Flat | View on Amazon |
| STANDARD MOTOR PRODUCTS | TC654 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Towing Packagewith 7 Way | 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.
13 Trailer Connector parts are listed for the 2021 Toyota Sequoia, from CURT and STANDARD MOTOR PRODUCTS. CURT 55415 carries the "Popular" badge.
Trailer Extension Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT | 56475 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Custom Wiring Harness Extension | View on Amazon |
This table covers the harness connectors at the Trailer Extension. 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: CURT 56475.
Turn Signal Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S3169 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear | 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.
One part is listed for the 2021 Toyota Sequoia — STANDARD MOTOR PRODUCTS S3169.
Vapor Leak Detection Pump Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S2818.
Washer Fluid Level Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S3320 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Unit | View on Amazon |
This table covers the harness connectors at the Washer 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S3320.
Washer Pump Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S3083 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: Rectangle | 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 S3083.
Wiper Motor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S1423 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Unit | View on Amazon |
This table covers the harness connectors at the Wiper 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 S1423.
Buying Electrical Connector Parts for a 2021 Toyota Sequoia
On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.
- Confirm you have the 5.7L V8 engine — every part on this page is matched to it.
- 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 Sequoia?
Our catalog currently lists 48 electrical connector parts for the 2021 Toyota Sequoia across 25 subcategories and 6 brands, covering the 5.7L V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical connector problems on a 2021 Toyota Sequoia?
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 Sequoia 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 Sequoia?
Every part on this page is matched to the 5.7L V8 engine. 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 Sequoia
Electrical Connector Parts for Other Toyota Sequoia 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.