The 2021 Ford F-150 has 100 electrical switch & relay parts with verified fitment on this page — 24 part types and 15 brands, covering all 6 engine options (2.7L V6 Turbocharged, 3.0L V6 DIESEL Turbocharged, 3.3L V6, 3.5L V6 ELECTRIC/GAS Turbocharged and more). Each part includes a manufacturer part number and application notes.
The switch and relay system on the 2021 Ford F-150 covers the switches, relays and flashers that route power to everything the driver touches. The largest groups are Headlamp Switch (12 parts), Oil Pressure Sender / Switch (12 parts) and Brake Light Switch (9 parts). The other 21 part types cover the remaining 67 parts.
The 2021 Ford F-150 was sold with 6 engines. 79 parts fit every engine; the other 21 are engine-specific. Each part shows which engine(s) it fits.
15 brands supply electrical switch & relay parts for the 2021 Ford F-150, led by MOTORCRAFT (58 parts), STANDARD MOTOR PRODUCTS (15 parts) and WELLS (8 parts), plus 12 more brands. Quality grades include Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Ford F-150. 21 parts have it, including MOTORCRAFT YH2034 (A/C Refrigerant Pressure Switch) and MOTORCRAFT SW8936 (Accessory Switch). Each part number opens a page with every vehicle that part fits.
4WD Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Fits: all 2021 F-150 engines | DMS8 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Axle without limited slip differential | View on Amazon |
This table covers the 4WD 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 2021 Ford F-150 — MOTORCRAFT DMS8.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Popular Fits: all 2021 F-150 engines | YH2034 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Cut Off SwitchM10 X 1.25 - 6H Thread | View on Amazon |
| DORMAN Fits: all 2021 F-150 engines | 904612 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| FOUR SEASONS Fits: all 2021 F-150 engines | 37340 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Switch | View on Amazon |
| GPD Fits: all 2021 F-150 engines | 1711937 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Transducer | View on Amazon |
| UAC Fits: all 2021 F-150 engines | SW10101C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Transducer | 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 2021 Ford F-150, from MOTORCRAFT, DORMAN, FOUR SEASONS and 2 other brands. MOTORCRAFT YH2034 carries the "Popular" badge. All of them fit every engine offered in the 2021 F-150.
Listed part numbers: MOTORCRAFT YH2034, DORMAN 904612 and FOUR SEASONS 37340, plus the other parts above.
Accessory Power Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 F-150 engines | RY1744 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 70 Ampswith 4 Blade Terminals | View on Amazon |
| WELLS Fits: all 2021 F-150 engines | 1R3394 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 4 Terminal(s)70 Amps | 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.
2 Accessory Power Relay parts for the 2021 Ford F-150 come from 2 brands — STANDARD MOTOR PRODUCTS and WELLS. Every part fits all 6 engine options (2.7L V6 Turbocharged, 3.0L V6 DIESEL Turbocharged, 3.3L V6, 3.5L V6 ELECTRIC/GAS Turbocharged and more).
Part numbers include STANDARD MOTOR PRODUCTS RY1744 and WELLS 1R3394.
Accessory Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Popular Fits: all 2021 F-150 engines | SW8936 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Standard PUR Steering Wheel | View on Amazon |
| MOTORCRAFT Popular Fits: all 2021 F-150 engines | SW8937 | 🇺🇸 US 🇨🇦 CA | Lariat or XLT Modelwith Electric Power Steering | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW8938 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Adaptive Speed Controlwith Deluxe Steering Wheel | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW9189 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IgnitionPush to Start Switch | View on Amazon |
| MOTORCRAFT Fits: 2.7L V6 Turbocharged, 3.0L V6 DIESEL Turbocharged, 3.3L V6, 3.5L V6 ELECTRIC/GAS Turbocharged, 5.0L V8 | SW8501 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Stop/Start SystemInstrument Panel | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW8513 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Special Equipment PackageInstrument Panel | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW8538 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Rear Heated SeatsConsole | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW9160 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | CONSOLE - OVERHEAD | View on Amazon |
This table covers the Accessory 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.
8 Accessory Switch parts for the 2021 Ford F-150 come from MOTORCRAFT. The "Popular" part is MOTORCRAFT SW8936. 7 parts fit every engine; the other 1 is engine-specific.
Listed part numbers: MOTORCRAFT SW8936, MOTORCRAFT SW8937 and MOTORCRAFT SW8938, plus the other parts above.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Fits: all 2021 F-150 engines | 2BLS0025 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| SKP Fits: all 2021 F-150 engines | SKSLS510 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: all 2021 F-150 engines | SLS510T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Popular Fits: all 2021 F-150 engines | SW7810 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Use with WPT-912 | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular Fits: all 2021 F-150 engines | SLS510 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| BECK/ARNLEY Fits: all 2021 F-150 engines | 2012749 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| ROSTRA Fits: all 2021 F-150 engines | 620008 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| UNITED MOTOR PRODUCTS Fits: all 2021 F-150 engines | SW409 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WELLS Fits: all 2021 F-150 engines | 1S10920 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mounting Hardware Included: No | 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.
9 Brake Light Switch parts are listed for the 2021 Ford F-150, from STANDARD MOTOR PRODUCTS, HOLSTEIN, SKP and 5 other brands. MOTORCRAFT SW7810 carries the "Popular" badge. All of them fit every engine offered in the 2021 F-150.
In the Economy grade, HOLSTEIN, SKP and STANDARD MOTOR PRODUCTS supply 3 parts: the catalog's value-priced group. A representative part number is HOLSTEIN 2BLS0025.
The Standard Replacement section lists 6 options from MOTORCRAFT, STANDARD MOTOR PRODUCTS, BECK/ARNLEY and 3 other brands — built to original-equipment specification. MOTORCRAFT SW7810 is listed in this group.
Listed part numbers: MOTORCRAFT SW7810, HOLSTEIN 2BLS0025 and SKP SKSLS510, plus the other parts above.
Cruise Control Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7451 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Leftwithout Speed Control | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7452 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rightwith Speed Control | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7449 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LeftColor: Black | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7450 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Leftwith Adaptive Speed Control | View on Amazon |
This table covers the Cruise Control 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.
4 Cruise Control Switch parts for the 2021 Ford F-150 come from MOTORCRAFT. Every part fits all 6 engine options (2.7L V6 Turbocharged, 3.0L V6 DIESEL Turbocharged, 3.3L V6, 3.5L V6 ELECTRIC/GAS Turbocharged and more).
Listed part numbers: MOTORCRAFT SW7451, MOTORCRAFT SW7452 and MOTORCRAFT SW7449, plus the other parts above.
Dimmer Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 F-150 engines | WP707 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Active Steering Controlwith Automatic Wipers | View on Amazon |
This table covers the dimmer switches that select headlamp high and low beam. 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: STANDARD MOTOR PRODUCTS WP707.
Door Jamb Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Fits: all 2021 F-150 engines | SW5855 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Tailgate | View on Amazon |
This table covers the Door Jamb 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: MOTORCRAFT SW5855.
Door Lock Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular Fits: all 2021 F-150 engines | 901217 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Right | View on Amazon |
| DORMAN Fits: all 2021 F-150 engines | 920571 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Left | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Popular Fits: all 2021 F-150 engines | SW7283 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front LeftColor: Black | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7282 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front RightColor: Black | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO Fits: all 2021 F-150 engines | V25730158 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Left | View on Amazon |
| VEMO Fits: all 2021 F-150 engines | V25730159 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Right | View on Amazon |
This table covers the Door Lock 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.
6 Door Lock Switch parts are listed for the 2021 Ford F-150, from DORMAN, MOTORCRAFT and VEMO. DORMAN 901217 carries the "Popular" badge. All of them fit every engine offered in the 2021 F-150.
Economy: 2 parts, from DORMAN. A representative part number is DORMAN 901217.
The Standard Replacement section: 2 options from MOTORCRAFT. MOTORCRAFT SW7283 is listed in this group.
2 ungrouped parts are not assigned to a grade, with the same engine-level match.
Listed part numbers: DORMAN 901217, DORMAN 920571 and MOTORCRAFT SW7283, plus the other parts above.
Hazard Warning Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Popular Fits: all 2021 F-150 engines | SW7413 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Standard Electric Starter Motor | View on Amazon |
| MOTORCRAFT Popular Fits: all 2021 F-150 engines | SW8519 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Special Equipment PackageInstrument Panel | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW8517 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Snow Plow PackageInstrument Panel | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW8498 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Instrument Panelwith Advanced Automated Park System | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW8502 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Hill Descent ControlInstrument Panel | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW8512 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Instrument Panelwithout Automated Parking System | View on Amazon |
This table covers the Hazard Warning 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.
6 Hazard Warning Switch parts for the 2021 Ford F-150 come from MOTORCRAFT. The "Popular" part is MOTORCRAFT SW7413. Every part fits all 6 engine options (2.7L V6 Turbocharged, 3.0L V6 DIESEL Turbocharged, 3.3L V6, 3.5L V6 ELECTRIC/GAS Turbocharged and more).
Part numbers include MOTORCRAFT SW7413, MOTORCRAFT SW8519 and MOTORCRAFT SW8517, among others listed above.
Headlamp Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Popular Fits: all 2021 F-150 engines | SW7421 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Front Fog Lightswith Auto Headlamp Plus Wiper | View on Amazon |
| MOTORCRAFT Popular Fits: 2.7L V6 Turbocharged, 3.0L V6 DIESEL Turbocharged, 3.3L V6, 3.5L V6 ELECTRIC/GAS Turbocharged, 5.0L V8 | SW8793 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Special Purpose Vehiclewith Front Fog Lamps | View on Amazon |
| MOTORCRAFT Popular Fits: all 2021 F-150 engines | SW8734 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Front Fog Lampswith Auto Headlamp Plus Wiper | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW8497 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Instrument Panelwith Spot Light | View on Amazon |
| MOTORCRAFT Fits: 2.7L V6 Turbocharged, 3.0L V6 DIESEL Turbocharged, 3.3L V6, 3.5L V6 ELECTRIC/GAS Turbocharged, 5.0L V8 | SW8792 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Special Purpose Vehiclewithout Front Fog Lamps | View on Amazon |
| MOTORCRAFT Fits: 3.5L V6 Turbocharged | SW8794 | 🇺🇸 US 🇨🇦 CA | without Front Fog Lamps | View on Amazon |
| MOTORCRAFT Fits: 3.5L V6 Turbocharged | SW8797 | 🇺🇸 US 🇨🇦 CA | Police Responderwith Fog Lamps | View on Amazon |
| MOTORCRAFT Fits: 3.5L V6 Turbocharged | SW8795 | 🇺🇸 US 🇨🇦 CA | with Front LED Fog Lamps | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 F-150 engines | HLS1796 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without LED Lightswithout Fog Lights | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 F-150 engines | HLS1795 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Fog Lightswith Cargo Area Light | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 F-150 engines | HLS1807 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with LED Headlightswith Fog Lights | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 F-150 engines | HLS1802 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Fog Lightswith LED Headlights | View on Amazon |
This table covers the column or dash switches that control the exterior 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.
12 Headlamp Switch parts for the 2021 Ford F-150 come from 2 brands — MOTORCRAFT and STANDARD MOTOR PRODUCTS. The "Popular" part is MOTORCRAFT SW7421. 7 parts fit every engine; the other 5 are engine-specific.
Ignition Starter Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Popular Fits: all 2021 F-150 engines | SW6958 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Key-Integral Fobwith Locking Steering Column | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW9282 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Switch Assembly-Ignition | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 F-150 engines | US1510 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mounting Location: Dashboard | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 F-150 engines | US1522 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mounting Location: Column | View on Amazon |
| WELLS Fits: all 2021 F-150 engines | 1S17757 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without keyless ignition system | 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.
5 Ignition Starter Switch parts for the 2021 Ford F-150 come from 3 brands — MOTORCRAFT, STANDARD MOTOR PRODUCTS and WELLS. The "Popular" part is MOTORCRAFT SW6958. Every part fits all 6 engine options (2.7L V6 Turbocharged, 3.0L V6 DIESEL Turbocharged, 3.3L V6, 3.5L V6 ELECTRIC/GAS Turbocharged and more).
Listed part numbers: MOTORCRAFT SW6958, MOTORCRAFT SW9282 and STANDARD MOTOR PRODUCTS US1510, plus the other parts above.
Instrument Cluster Voltage Regulator Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7723 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Stop/Start Systemwithout Special Equipment Package | View on Amazon |
This table covers the Instrument Cluster Voltage Regulator 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: MOTORCRAFT SW7723.
Multi-Function Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: all 2021 F-150 engines | 1R3394 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 4 Terminal(s)70 Amps | 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.
One part is listed for the 2021 Ford F-150 — WELLS 1R3394.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular Fits: 3.3L V6 | 926461 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| UNITED MOTOR PRODUCTS Popular Fits: 3.5L V6 ELECTRIC/GAS Turbocharged, 3.5L V6 Turbocharged, 2.7L V6 Turbocharged, 3.3L V6, 5.0L V8 | OPS335 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light | View on Amazon |
| WALKER PRODUCTS Popular Fits: 3.0L V6 DIESEL Turbocharged | 2561148 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: 2.7L V6 Turbocharged, 3.3L V6, 3.5L V6 ELECTRIC/GAS Turbocharged, 3.5L V6 Turbocharged, 5.0L V8 | PS658 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Gauge | View on Amazon |
| WELLS Popular Fits: 2.7L V6 Turbocharged, 5.0L V8, 3.3L V6 | 1S16082 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | To 10/12/2020 | View on Amazon |
| MOTORCRAFT Fits: 2.7L V6 Turbocharged, 3.5L V6 ELECTRIC/GAS Turbocharged, 3.5L V6 Turbocharged, 5.0L V8 | OPS4 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| MOTORCRAFT Fits: 3.0L V6 DIESEL Turbocharged | OPS5 | 🇺🇸 US 🇨🇦 CA | for Cylinder Head | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 3.0L V6 DIESEL Turbocharged | PS759 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS Fits: 3.0L V6 DIESEL Turbocharged | 1S16097 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD Fits: all 2021 F-150 engines | 1816548 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light | View on Amazon |
| HOLSTEIN Fits: 2.7L V6 Turbocharged, 3.3L V6, 3.5L V6 ELECTRIC/GAS Turbocharged, 3.5L V6 Turbocharged, 5.0L V8 | 2OPS0066 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Gauge | View on Amazon |
| WELLS Fits: 3.5L V6 ELECTRIC/GAS Turbocharged, 3.5L V6 Turbocharged, 5.0L V8 | 1S18316 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits or From 10/12/2020 | 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.
12 Oil Pressure Sender / Switch parts are listed for the 2021 Ford F-150, from WELLS, STANDARD MOTOR PRODUCTS, MOTORCRAFT and 5 other brands. DORMAN 926461 carries the "Popular" badge. 1 part fits every engine; the other 11 are engine-specific.
Economy: 3 parts, from DORMAN, UNITED MOTOR PRODUCTS and WALKER PRODUCTS. A representative part number is DORMAN 926461.
The Standard Replacement section: 6 options from STANDARD MOTOR PRODUCTS, WELLS and MOTORCRAFT. STANDARD MOTOR PRODUCTS PS658 is listed in this group.
3 ungrouped parts are not assigned to a grade, with the same engine-level match.
Parking Brake Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Fits: all 2021 F-150 engines | SW9251 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Performance Version | 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 2021 Ford F-150 — MOTORCRAFT SW9251.
Power Seat Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Popular Fits: all 2021 F-150 engines | SW7974 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Seat SwitchAdjusting | View on Amazon |
| MOTORCRAFT Popular Fits: all 2021 F-150 engines | SW7975 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Seat SwitchAdjusting | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7369 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Seat SwitchAdjusting | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7383 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Seat SwitchAdjusting | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7494 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Seat SwitchAdjusting | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7965 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Seat SwitchAdjusting | View on Amazon |
| MOTORCRAFT Fits: 2.7L V6 Turbocharged, 3.3L V6 | SW7980 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Seat SwitchAdjusting | View on Amazon |
| MOTORCRAFT Fits: 3.0L V6 DIESEL Turbocharged, 3.5L V6 ELECTRIC/GAS Turbocharged, 3.5L V6 Turbocharged, 5.0L V8 | SW7735 | 🇺🇸 US 🇨🇦 CA | Seat SwitchAdjusting | View on Amazon |
This table covers the Power Seat 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.
8 Power Seat Switch parts for the 2021 Ford F-150 come from MOTORCRAFT. The "Popular" part is MOTORCRAFT SW7974. 6 parts fit every engine; the other 2 are engine-specific.
Listed part numbers: MOTORCRAFT SW7974, MOTORCRAFT SW7975 and MOTORCRAFT SW7369, plus the other parts above.
Seat Heater Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7539 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front LeftColor: Black | View on Amazon |
This table covers the Seat Heater 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: MOTORCRAFT SW7539.
Speaker Amplifier Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| METRA Fits: all 2021 F-150 engines | AXFD5V | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 5 Volt Step Down | View on Amazon |
This table covers the relays that control the Speaker Amplifier 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.
One part is listed for the 2021 Ford F-150 — METRA AXFD5V.
Traction / Stability Control Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Fits: all 2021 F-150 engines | SW8622 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Advanced Automated Park Systemwith 12" Multi-Function Display | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW8623 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Automated Parking SystemABS - Trail Control Trail 1 Pedal | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW8625 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Automated Parking Systemwith 12" Multi-Function Display | View on Amazon |
This table covers the Traction / Stability Control 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.
MOTORCRAFT supplies the 3 Traction / Stability Control Switch parts for the 2021 Ford F-150. All of them fit every engine offered in the 2021 F-150.
Listed part numbers: MOTORCRAFT SW8622, MOTORCRAFT SW8623 and MOTORCRAFT SW8625.
Transmission-Automatic Fluid Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Fits: 3.3L V6 | OPS7 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| MOTORCRAFT Fits: 3.5L V6 ELECTRIC/GAS Turbocharged | OPS8 | 🇺🇸 US 🇨🇦 CA | Trans. code 10R80 MHT | View on Amazon |
This table covers the Transmission-Automatic Fluid Pressure 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.
MOTORCRAFT supplies both parts for the 2021 Ford F-150.
Part numbers include MOTORCRAFT OPS7 and MOTORCRAFT OPS8.
Trunk Lid / Tailgate Release Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7690 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Back Glass or Liftgate | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7733 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Power Tailgate | View on Amazon |
| WELLS Fits: all 2021 F-150 engines | 1S18255 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Trunk Lid / Tailgate Release 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.
3 Trunk Lid / Tailgate Release Switch parts for the 2021 Ford F-150 come from 2 brands — MOTORCRAFT and WELLS. Every part fits all 6 engine options (2.7L V6 Turbocharged, 3.0L V6 DIESEL Turbocharged, 3.3L V6, 3.5L V6 ELECTRIC/GAS Turbocharged and more).
This group includes MOTORCRAFT SW7690, MOTORCRAFT SW7733 and WELLS 1S18255.
Turn Signal Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Popular Fits: all 2021 F-150 engines | SW7917 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Variable Intermittent Wiperwith Power Steering Gear | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW9163 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Automatic Windscreen Wiper | View on Amazon |
| MOTORCRAFT Fits: all 2021 F-150 engines | SW9162 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Direction Indicator | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 F-150 engines | WP707 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Column Mountedwithout Active Steering Control | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 F-150 engines | WP708 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Column Mountedwithout Rain Sensitive Wipers | View on Amazon |
This table covers the combination / turn-signal 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.
5 Turn Signal Switch parts are listed for the 2021 Ford F-150, from MOTORCRAFT and STANDARD MOTOR PRODUCTS. MOTORCRAFT SW7917 carries the "Popular" badge. All of them fit every engine offered in the 2021 F-150.
Part numbers include MOTORCRAFT SW7917, MOTORCRAFT SW9163 and MOTORCRAFT SW9162, among others listed above.
Wiper / Washer Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT Fits: all 2021 F-150 engines | SW7918 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Frontwith Automatic Windshield Wipers | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 F-150 engines | WP708 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Column Mountedwithout Rain Sensitive Wipers | View on Amazon |
This table covers the Wiper / Washer 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 Wiper / Washer Switch parts for the 2021 Ford F-150 come from 2 brands — MOTORCRAFT and STANDARD MOTOR PRODUCTS. Every part fits all 6 engine options (2.7L V6 Turbocharged, 3.0L V6 DIESEL Turbocharged, 3.3L V6, 3.5L V6 ELECTRIC/GAS Turbocharged and more).
Listed part numbers: MOTORCRAFT SW7918 and STANDARD MOTOR PRODUCTS WP708.
Buying Electrical Switch & Relay Parts for a 2021 Ford F-150
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. Some electrical switch & relay 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, 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: Headlamp Switch and Oil Pressure Sender / Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2021 Ford F-150?
Our catalog currently lists 100 electrical switch & relay parts for the 2021 Ford F-150 across 24 subcategories and 15 brands, covering all 6 engine options (2.7L V6 Turbocharged, 3.0L V6 DIESEL Turbocharged, 3.3L V6, 3.5L V6 ELECTRIC/GAS Turbocharged and more). Each part is matched to the engine(s) it fits.
Do electrical switch & relay parts differ between 2021 Ford F-150 engines?
Some do. 79 parts fit every engine; the other 21 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 switch & relay problems on a 2021 Ford F-150?
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 2021 Ford F-150 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 Ford F-150?
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 2021 Ford F-150
Electrical Switch & Relay Parts for Other Ford F-150 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.