The 2021 Audi S6 has 4 electrical switch & relay parts with verified fitment on this page — 3 part types and 4 brands, covering the 2.9L V6 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2021 Audi S6, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. All 4 listed parts are A/C Refrigerant Pressure Switch (2 parts), A/C Thermo Switch (1 part) and Brake Light Switch (1 part).
The 2021 Audi S6 came with a single engine, the 2.9L V6 Turbocharged, and every part is verified against it.
4 brands supply electrical switch & relay parts for the 2021 Audi S6, led by FOUR SEASONS (1 part), UAC (1 part) and GPD (1 part), plus 1 more brand.
Each part number listed for the 2021 Audi S6 opens a page with every vehicle that part fits.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS | 37427 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Switch | View on Amazon |
| UAC | SW11103C | 🇺🇸 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.
2 A/C Refrigerant Pressure Switch parts are listed for the 2021 Audi S6, from FOUR SEASONS and UAC.
Part numbers include FOUR SEASONS 37427 and UAC SW11103C.
A/C Thermo Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD | 1713414 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Thermistor | View on Amazon |
This table covers the A/C Thermo 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: GPD 1713414.
Brake Light Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S10862 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
One part is listed for the 2021 Audi S6 — WELLS 1S10862.
Buying Electrical Switch & Relay Parts for a 2021 Audi S6
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 2.9L 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: A/C Refrigerant Pressure Switch and A/C Thermo Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2021 Audi S6?
Our catalog currently lists 4 electrical switch & relay parts for the 2021 Audi S6 across 3 subcategories and 4 brands, covering the 2.9L 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 Audi S6?
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 Audi S6 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 Audi S6?
Every part on this page is matched to the 2.9L 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 Audi S6
Electrical Switch & Relay Parts for Other Audi S6 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.