The 2018 Audi A7 has 30 electrical switch & relay parts with verified fitment on this page — 15 part types and 11 brands, covering both the 2.0L L4 Turbocharged and the 3.0L V6 Supercharged. Each part includes a manufacturer part number and application notes.
On the 2018 Audi A7, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. 12 parts of the 30 listed are Multi-Function Relay (5 parts), Brake Light Switch (4 parts) and A/C Refrigerant Pressure Switch (3 parts). The other 12 part types cover the remaining 18 parts.
The 2018 Audi A7 was sold with both the 2.0L L4 Turbocharged and the 3.0L V6 Supercharged. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2018 Audi A7 electrical switch & relay parts are WELLS (12 parts), HELLA (5 parts) and STANDARD MOTOR PRODUCTS (3 parts), plus 8 more brands. Quality grades include Standard Replacement and Economy.
1 part on this 2018 Audi A7 page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — WELLS 1R1007 (Multi-Function Relay). Click any part number to see every vehicle that part fits.
A/C Condenser Fan Motor Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.0L L4 Turbocharged | 933332451 | 🇲🇽 MX | 4-pin connector | View on Amazon |
This table covers the relays that control the A/C Condenser Fan Motor 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: HELLA 933332451.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS Fits: 2.0L L4 Turbocharged | 37427 | 🇲🇽 MX | Pressure Switch | View on Amazon |
| UAC Fits: 2.0L L4 Turbocharged | SW11224C | 🇲🇽 MX | Pressure Transducer | View on Amazon |
| VNE Fits: 2.0L L4 Turbocharged | 4016002 | 🇲🇽 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 A7 come from 3 brands — FOUR SEASONS, UAC and VNE.
Part numbers include FOUR SEASONS 37427, UAC SW11224C and VNE 4016002.
Accessory Power Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.0L L4 Turbocharged | 933332451 | 🇲🇽 MX | 4-pin connector | 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.
One part is listed for the 2018 Audi A7 — HELLA 933332451.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 2.0L L4 Turbocharged | 920497 | 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA Fits: 2.0L L4 Turbocharged | 620127 | 🇲🇽 MX | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 Turbocharged | SLS488 | 🇲🇽 MX | View on Amazon | |
| WELLS Fits: 2.0L L4 Turbocharged | 1S10938 | 🇲🇽 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 A7 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.
Listed part numbers: DORMAN 920497, ROSTRA 620127 and STANDARD MOTOR PRODUCTS SLS488, plus the other parts above.
Dimmer Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 2.0L L4 Turbocharged | 1S14794 | 🇲🇽 MX | without Adaptive Cruise Controlwith Lane Departure Warning System | View on Amazon |
| WELLS Fits: 2.0L L4 Turbocharged | 1S14788 | 🇲🇽 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 A7.
Listed part numbers: WELLS 1S14794 and WELLS 1S14788.
Fog / Driving Lamp Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.0L L4 Turbocharged | 933332451 | 🇲🇽 MX | 4-pin connector | View on Amazon |
This table covers the relays that control the Fog / Driving Lamp 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: HELLA 933332451.
Fuel Pump / Circuit Opening Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.0L L4 Turbocharged | 933332451 | 🇲🇽 MX | 4-pin connector | 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.
This group shows a single part: HELLA 933332451.
Horn Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 2.0L L4 Turbocharged | 1R2303 | 🇲🇽 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 2018 Audi A7 — WELLS 1R2303.
Ignition Starter Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 2.0L L4 Turbocharged | 1S17872 | 🇲🇽 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 A7 — WELLS 1S17872.
Multi-Function Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Popular Fits: 2.0L L4 Turbocharged | 1R1007 | 🇲🇽 MX | Mounting Hardware Included: No | View on Amazon |
| BOSCH Fits: 2.0L L4 Turbocharged | 0986AH0082 | 🇲🇽 MX | Multi-Purpose Relay | View on Amazon |
| BOSCH Fits: 2.0L L4 Turbocharged | 0986332209 | 🇲🇽 MX | Multi-Purpose Relay | View on Amazon |
| BOSCH Fits: 2.0L L4 Turbocharged | 0986AH0080 | 🇲🇽 MX | Multi-Purpose Relay | View on Amazon |
| ÜRO PARTS Fits: 2.0L L4 Turbocharged | 7M0951253A | 🇲🇽 MX | 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.
5 Multi-Function Relay parts for the 2018 Audi A7 come from 3 brands — BOSCH, WELLS and ÜRO PARTS. The "Popular" part is WELLS 1R1007.
This group includes WELLS 1R1007, BOSCH 0986AH0082 and BOSCH 0986332209 and the remaining parts above.
Oil Pressure Sender / Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 Turbocharged | PS662 | 🇲🇽 MX | View on Amazon | |
| VEMO Fits: 2.0L L4 Turbocharged | V10720420 | 🇲🇽 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.
2 Oil Pressure Sender / Switch parts for the 2018 Audi A7 come from 2 brands — STANDARD MOTOR PRODUCTS and VEMO.
Part numbers include STANDARD MOTOR PRODUCTS PS662 and VEMO V10720420.
Power Window Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 Turbocharged | DWS2198 | 🇲🇽 MX | Right | View on Amazon |
| WELLS Fits: 2.0L L4 Turbocharged | 1S13089 | 🇲🇽 MX | Fits RearTo 05/2018 | View on Amazon |
| WELLS Fits: 2.0L L4 Turbocharged | 1S13072 | 🇲🇽 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 A7 come from 2 brands — WELLS and STANDARD MOTOR PRODUCTS.
Part numbers include STANDARD MOTOR PRODUCTS DWS2198, WELLS 1S13089 and WELLS 1S13072.
Radiator Fan Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.0L L4 Turbocharged | 933332451 | 🇲🇽 MX | 4-pin connector | View on Amazon |
This table covers the relays that control the Radiator Fan 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 2018 Audi A7 — HELLA 933332451.
Turn Signal Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 2.0L L4 Turbocharged | 1S14794 | 🇲🇽 MX | without Adaptive Cruise Controlwith Lane Departure Warning System | View on Amazon |
| WELLS Fits: 2.0L L4 Turbocharged | 1S14788 | 🇲🇽 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.
2 Turn Signal Switch parts for the 2018 Audi A7 come from WELLS.
This group includes WELLS 1S14794 and WELLS 1S14788.
Wiper / Washer Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 2.0L L4 Turbocharged | 1S14794 | 🇲🇽 MX | without Adaptive Cruise Controlwith Lane Departure Warning System | View on Amazon |
| WELLS Fits: 2.0L L4 Turbocharged | 1S14788 | 🇲🇽 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 A7.
Listed part numbers: WELLS 1S14794 and WELLS 1S14788.
Buying Electrical Switch & Relay Parts for a 2018 Audi A7
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. Every electrical switch & relay part here is 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: Multi-Function Relay and Brake Light Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2018 Audi A7?
Our catalog currently lists 30 electrical switch & relay parts for the 2018 Audi A7 across 15 subcategories and 11 brands, covering both the 2.0L L4 Turbocharged and the 3.0L V6 Supercharged. Each part is matched to the engine(s) it fits.
Do electrical switch & relay parts differ between 2018 Audi A7 engines?
Yes. Every electrical switch & relay part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. 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 2018 Audi A7?
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 A7 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 A7?
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 2018 Audi A7
Electrical Switch & Relay Parts for Other Audi A7 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.