The 2018 Audi S7 has 46 electrical switch & relay parts with verified fitment on this page — 18 part types and 12 brands, covering the 4.0L V8 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2018 Audi S7, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. 15 parts of the 46 listed are Oil Pressure Sender / Switch (8 parts), Brake Light Switch (4 parts) and A/C Refrigerant Pressure Switch (3 parts). The other 15 part types cover the remaining 31 parts.
Every part on this page is matched to the 4.0L V8 Turbocharged — the only engine offered in the 2018 Audi S7.
The most listed brands for 2018 Audi S7 electrical switch & relay parts are WELLS (18 parts), STANDARD MOTOR PRODUCTS (9 parts) and VEMO (7 parts), plus 9 more brands. Quality grades include Standard Replacement and Economy.
2 parts on this 2018 Audi S7 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 | SW11224C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pressure Transducer | View on Amazon |
| VNE | 4016002 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
3 A/C Refrigerant Pressure Switch parts for the 2018 Audi S7 come from 3 brands — FOUR SEASONS, UAC and VNE.
Part numbers include FOUR SEASONS 37427, UAC SW11224C and VNE 4016002.
ABS Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | RY577 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Functions: Fuel Pump Relay | View on Amazon |
| WELLS | 1R2303 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mounting Hardware Included: No | View on Amazon |
This table covers the relays that control the ABS 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 ABS Relay parts for the 2018 Audi S7 come from 2 brands — STANDARD MOTOR PRODUCTS and WELLS.
Listed part numbers: STANDARD MOTOR PRODUCTS RY577 and WELLS 1R2303.
Accessory Power Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | RY577 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Functions: Fuel Pump Relay | View on Amazon |
| WELLS | 1R2303 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mounting Hardware Included: No | 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 are listed for the 2018 Audi S7, from STANDARD MOTOR PRODUCTS and WELLS.
This group includes STANDARD MOTOR PRODUCTS RY577 and WELLS 1R2303.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 920497 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA | 620127 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| STANDARD MOTOR PRODUCTS | SLS488 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WELLS | 1S10938 | 🇺🇸 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.
4 Brake Light Switch parts for the 2018 Audi S7 come from 4 brands — DORMAN, ROSTRA, STANDARD MOTOR PRODUCTS and 1 other brand.
The Economy section lists 1 option from DORMAN — the catalog's value-priced group. DORMAN 920497 is listed in this group.
In the Standard Replacement grade, ROSTRA, STANDARD MOTOR PRODUCTS and WELLS supply 3 parts: built to original-equipment specification. A representative part number is ROSTRA 620127.
This group includes DORMAN 920497, ROSTRA 620127 and STANDARD MOTOR PRODUCTS SLS488 and the remaining parts above.
Dimmer Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S14794 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Adaptive Cruise Controlwith Lane Departure Warning System | View on Amazon |
| WELLS | 1S14788 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Adaptive Cruise Controlwithout Lane Departure Warning System | 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.
WELLS supplies both parts for the 2018 Audi S7.
Part numbers include WELLS 1S14794 and WELLS 1S14788.
Fuel Pump / Circuit Opening Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | RY577 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Functions: Fuel Pump Relay | View on Amazon |
| VEMO | V15710070 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WELLS | 1R2303 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mounting Hardware Included: No | View on Amazon |
This table covers the relays that control the Fuel Pump / Circuit Opening 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.
3 Fuel Pump / Circuit Opening Relay parts for the 2018 Audi S7 come from 3 brands — STANDARD MOTOR PRODUCTS, VEMO and WELLS.
Listed part numbers: STANDARD MOTOR PRODUCTS RY577, VEMO V15710070 and WELLS 1R2303.
Hazard Warning Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730366 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Integrated Relay | 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.
One part is listed for the 2018 Audi S7 — VEMO V10730366.
Horn Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 965453801 | 🇺🇸 US | 5-pin connector | View on Amazon |
| 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.
2 Horn Relay parts are listed for the 2018 Audi S7, from HELLA and WELLS.
Listed part numbers: HELLA 965453801 and WELLS 1R2303.
Ignition Starter Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S17872 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
One part is listed for the 2018 Audi S7 — WELLS 1S17872.
Multi-Function Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH | 0986AH0307 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi-Purpose Relay | View on Amazon |
| ÜRO PARTS | 7M0951253A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| 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.
3 Multi-Function Relay parts for the 2018 Audi S7 come from 3 brands — BOSCH, ÜRO PARTS and WELLS.
Listed part numbers: BOSCH 0986AH0307, ÜRO PARTS 7M0951253A and WELLS 1R1007.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS | 2561150 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Color-Turquoise | View on Amazon |
| WALKER PRODUCTS | 2561112 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Light Blue | 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 | Light Blue | View on Amazon |
| HELLA | 003259971 | 🇺🇸 US | 1-Pin ConnectorColor: Black or Turquoise | View on Amazon |
| ROSTRA | 501409 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Light Blu | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS669 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Finish: Chrome, Plastic | View on Amazon |
| VEMO | V10720420 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | From 08/28/2017 | 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.
8 Oil Pressure Sender / Switch parts for the 2018 Audi S7 come from 6 brands — WALKER PRODUCTS, STANDARD MOTOR PRODUCTS, WELLS and 3 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS PS673.
The Economy section: 2 options from WALKER PRODUCTS. WALKER PRODUCTS 2561150 is listed in this group.
Standard Replacement: 6 parts, from STANDARD MOTOR PRODUCTS, WELLS, HELLA and 2 other brands. A representative part number is STANDARD MOTOR PRODUCTS PS673.
This group includes STANDARD MOTOR PRODUCTS PS673, WALKER PRODUCTS 2561150 and WALKER PRODUCTS 2561112 and the remaining parts above.
Power Seat Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730559 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LeftComfort front seats [Q2J] | 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.
One part is listed for the 2018 Audi S7 — VEMO V10730559.
Power Window Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | DWS2198 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Right | View on Amazon |
| WELLS | 1S13089 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits RearTo 05/2018 | View on Amazon |
| WELLS | 1S13072 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front LeftTo 05/2018 | 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.
3 Power Window Switch parts for the 2018 Audi S7 come from 2 brands — WELLS and STANDARD MOTOR PRODUCTS.
This group includes STANDARD MOTOR PRODUCTS DWS2198, WELLS 1S13089 and WELLS 1S13072.
Starter Motor Control Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | RY577 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Functions: Fuel Pump Relay | View on Amazon |
| WELLS | 1R2303 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mounting Hardware Included: No | View on Amazon |
This table covers the relays that control the Starter Motor Control 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 Starter Motor Control Relay parts are listed for the 2018 Audi S7, from STANDARD MOTOR PRODUCTS and WELLS.
Listed part numbers: STANDARD MOTOR PRODUCTS RY577 and WELLS 1R2303.
Trunk Lid / Tailgate Release Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730430 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| VEMO | V10730653 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear | 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.
VEMO supplies both parts for the 2018 Audi S7.
This group includes VEMO V10730430 and VEMO V10730653.
Turn Signal Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730428 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WELLS | 1S14794 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Adaptive Cruise Controlwith Lane Departure Warning System | View on Amazon |
| WELLS | 1S14788 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Adaptive Cruise Controlwithout Lane Departure Warning System | 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.
3 Turn Signal Switch parts for the 2018 Audi S7 come from 2 brands — WELLS and VEMO.
This group includes VEMO V10730428, WELLS 1S14794 and WELLS 1S14788.
Washer Pump Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | RY577 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Functions: Fuel Pump Relay | View on Amazon |
| WELLS | 1R2303 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mounting Hardware Included: No | View on Amazon |
This table covers the relays that control the Washer Pump 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 Washer Pump Relay parts for the 2018 Audi S7 come from 2 brands — STANDARD MOTOR PRODUCTS and WELLS.
Listed part numbers: STANDARD MOTOR PRODUCTS RY577 and WELLS 1R2303.
Wiper / Washer Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S14794 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Adaptive Cruise Controlwith Lane Departure Warning System | View on Amazon |
| WELLS | 1S14788 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Adaptive Cruise Controlwithout Lane Departure Warning System | 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.
WELLS supplies both parts for the 2018 Audi S7.
Part numbers include WELLS 1S14794 and WELLS 1S14788.
Buying Electrical Switch & Relay Parts for a 2018 Audi S7
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 Brake Light Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2018 Audi S7?
Our catalog currently lists 46 electrical switch & relay parts for the 2018 Audi S7 across 18 subcategories and 12 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 2018 Audi S7?
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 2018 Audi S7 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 2018 Audi S7?
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 2018 Audi S7
Electrical Switch & Relay Parts for Other Audi S7 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.