21 Electrical switch & relay parts are listed for the 2021 Ford GT, in 6 part types, covering the 3.5L V6 Turbocharged engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
The switch and relay system on the 2021 Ford GT covers the switches, relays and flashers that route power to everything the driver touches. The largest groups are Brake Light Switch (7 parts), Oil Pressure Sender / Switch (6 parts) and A/C Refrigerant Pressure Switch (4 parts). The other 3 part types cover the remaining 4 parts.
The 2021 Ford GT came with a single engine, the 3.5L V6 Turbocharged, and every part is verified against it.
12 brands supply electrical switch & relay parts for the 2021 Ford GT, led by STANDARD MOTOR PRODUCTS (3 parts), MOTORCRAFT (3 parts) and DORMAN (2 parts), plus 9 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 GT. 4 parts have it, including STANDARD MOTOR PRODUCTS SLS510T (Brake Light Switch) and DORMAN 926461 (Oil Pressure Sender / Switch). Each part number opens a page with every vehicle that part fits.
A/C Pressure Safety Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V25730143 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the A/C Pressure Safety 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: VEMO V25730143.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 904612 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| FOUR SEASONS | 37340 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Switch | View on Amazon |
| GPD | 1711937 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Transducer | View on Amazon |
| UAC | 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.
4 A/C Refrigerant Pressure Switch parts are listed for the 2021 Ford GT, from DORMAN, FOUR SEASONS, GPD and 1 other brand.
Part numbers include DORMAN 904612, FOUR SEASONS 37340 and GPD 1711937, among others listed above.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | SLS510T | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | T-Series | View on Amazon |
| HOLSTEIN | 2BLS0025 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| SKP | SKSLS510 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | SLS510 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| ROSTRA | 620008 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| UNITED MOTOR PRODUCTS | SW409 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WELLS | 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.
7 Brake Light Switch parts are listed for the 2021 Ford GT, from STANDARD MOTOR PRODUCTS, HOLSTEIN, SKP and 3 other brands. STANDARD MOTOR PRODUCTS SLS510T carries the "Popular" badge.
In the Economy grade, STANDARD MOTOR PRODUCTS, HOLSTEIN and SKP supply 3 parts: the catalog's value-priced group. A representative part number is STANDARD MOTOR PRODUCTS SLS510T.
The Standard Replacement section lists 4 options from STANDARD MOTOR PRODUCTS, ROSTRA, UNITED MOTOR PRODUCTS and 1 other brand — built to original-equipment specification. STANDARD MOTOR PRODUCTS SLS510 is listed in this group.
Listed part numbers: STANDARD MOTOR PRODUCTS SLS510T, HOLSTEIN 2BLS0025 and SKP SKSLS510, plus the other parts above.
Door Lock Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT | SW8842 | 🇺🇸 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.
One part is listed for the 2021 Ford GT — MOTORCRAFT SW8842.
Headlamp Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORCRAFT | SW8840 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| MOTORCRAFT | SW8841 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
2 Headlamp Switch parts for the 2021 Ford GT come from MOTORCRAFT.
Part numbers include MOTORCRAFT SW8840 and MOTORCRAFT SW8841.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular | 926461 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| UNITED MOTOR PRODUCTS | OPS335 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | PS658 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WELLS | 1S16082 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD | 1816548 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light | View on Amazon |
| HOLSTEIN | 2OPS0066 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light | 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.
6 Oil Pressure Sender / Switch parts are listed for the 2021 Ford GT, from DORMAN, UNITED MOTOR PRODUCTS, STANDARD MOTOR PRODUCTS and 3 other brands. DORMAN 926461 carries the "Popular" badge.
Economy: 2 parts, from DORMAN and UNITED MOTOR PRODUCTS. A representative part number is DORMAN 926461.
The Standard Replacement section: 2 options from STANDARD MOTOR PRODUCTS and WELLS. STANDARD MOTOR PRODUCTS PS658 is listed in this group.
2 ungrouped parts are not assigned to a grade, with the same engine-level match.
Part numbers include DORMAN 926461, UNITED MOTOR PRODUCTS OPS335 and STANDARD MOTOR PRODUCTS PS658, among others listed above.
Buying Electrical Switch & Relay Parts for a 2021 Ford GT
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Confirm you have the 3.5L V6 Turbocharged 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, 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: Brake Light Switch and Oil Pressure Sender / Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2021 Ford GT?
Our catalog currently lists 21 electrical switch & relay parts for the 2021 Ford GT across 6 subcategories and 12 brands, covering the 3.5L V6 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical switch & relay problems on a 2021 Ford GT?
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 GT 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 GT?
Every part on this page is matched to the 3.5L V6 Turbocharged engine. 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 GT
Electrical Switch & Relay Parts for Other Ford GT 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.