16 Electrical switch & relay parts are listed for the 2020 Audi S8, in 8 part types, covering the 4.0L V8 Turbocharged engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2020 Audi S8, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. 11 parts of the 16 listed are Oil Pressure Sender / Switch (7 parts), A/C Refrigerant Pressure Switch (2 parts) and Power Window Switch (2 parts). The other 5 part types cover the remaining 5 parts.
Every part on this page is matched to the 4.0L V8 Turbocharged — the only engine offered in the 2020 Audi S8.
The most listed brands for 2020 Audi S8 electrical switch & relay parts are WELLS (4 parts), VEMO (4 parts) and STANDARD MOTOR PRODUCTS (2 parts), plus 6 more brands. Quality grades include Standard Replacement and Economy.
2 parts on this 2020 Audi S8 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including STANDARD MOTOR PRODUCTS PS673 (Oil Pressure Sender / Switch) and WELLS 1S12104 (Oil Pressure Sender / Switch). Click any part number to see 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 for the 2020 Audi S8 come from 2 brands — 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.
One part is listed for the 2020 Audi S8 — GPD 1713414.
Brake Light Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S14224 | 🇺🇸 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.
This group shows a single part: WELLS 1S14224.
Horn Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1R2303 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mounting Hardware Included: No | View on Amazon |
This table covers the relays that control the Horn 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 2020 Audi S8 — WELLS 1R2303.
Multi-Function Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1R1007 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mounting Hardware Included: No | 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.
This group shows a single part: WELLS 1R1007.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS | 2561150 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | PS673 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Type: Socket | View on Amazon |
| WELLS Popular | 1S12104 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| HELLA | 003259971 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 1-Pin ConnectorColor: Black or Turquoise | View on Amazon |
| ROSTRA | 501409 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 1 TerminalsBlue Connector | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS669 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Finish: Chrome, Plastic | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730311 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 3 PINS | 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.
7 Oil Pressure Sender / Switch parts for the 2020 Audi S8 come from 6 brands — STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, WELLS and 3 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS PS673.
The Economy section lists 1 option from WALKER PRODUCTS — the catalog's value-priced group. WALKER PRODUCTS 2561150 is listed in this group.
In the Standard Replacement grade, STANDARD MOTOR PRODUCTS, WELLS, HELLA and 1 other brand supply 5 parts: built to original-equipment specification. A representative part number is STANDARD MOTOR PRODUCTS PS673.
1 further part sits outside the graded sections, with the same engine-level match.
Listed part numbers: STANDARD MOTOR PRODUCTS PS673, WALKER PRODUCTS 2561150 and WELLS 1S12104, plus the other parts above.
Power Window Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730719 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Front Right | View on Amazon |
| VEMO | V10730728 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front LeftSwitch Panel Assembly | View on Amazon |
This table covers the switches that command each window motor. 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 Power Window Switch parts for the 2020 Audi S8 come from VEMO.
Listed part numbers: VEMO V10730719 and VEMO V10730728.
Trunk Lid / Tailgate Release Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730458 | 🇺🇸 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.
One part is listed for the 2020 Audi S8 — VEMO V10730458.
Buying Electrical Switch & Relay Parts for a 2020 Audi S8
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 4.0L V8 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: Oil Pressure Sender / Switch and A/C Refrigerant Pressure Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2020 Audi S8?
Our catalog currently lists 16 electrical switch & relay parts for the 2020 Audi S8 across 8 subcategories and 9 brands, covering the 4.0L V8 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical switch & relay problems on a 2020 Audi S8?
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 2020 Audi S8 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 2020 Audi S8?
Every part on this page is matched to the 4.0L V8 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 2020 Audi S8
Electrical Switch & Relay Parts for Other Audi S8 Years
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