The 2020 Audi S3 has 31 electrical switch & relay parts with verified fitment on this page — 9 part types and 13 brands, covering the 2.0L L4 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2020 Audi S3, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. 24 parts of the 31 listed are Oil Pressure Sender / Switch (17 parts), Ignition Starter Switch (4 parts) and A/C Refrigerant Pressure Switch (3 parts). The other 6 part types cover the remaining 7 parts.
The 2020 Audi S3 came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
13 brands supply electrical switch & relay parts for the 2020 Audi S3, led by WELLS (6 parts), VEMO (6 parts) and HELLA (4 parts), plus 10 more brands. Quality grades include Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2020 Audi S3. 4 parts have it, including REIN ELP0078 (Oil Pressure Sender / Switch) and BECK/ARNLEY 2011754 (Oil Pressure Sender / Switch). Each part number 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 | 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 are listed for the 2020 Audi S3, from 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 |
|---|---|---|---|---|
| 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.
This group shows a single part: WELLS 1R2303.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ÜRO PARTS | 5G0698459 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| 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.
2 Brake Light Switch parts are listed for the 2020 Audi S3, from ÜRO PARTS and WELLS.
In the Economy grade, ÜRO PARTS supplies 1 part: the catalog's value-priced group. A representative part number is ÜRO PARTS 5G0698459.
The Standard Replacement section lists 1 option from WELLS — built to original-equipment specification. WELLS 1S10862 is listed in this group.
Listed part numbers: ÜRO PARTS 5G0698459 and WELLS 1S10862.
Ignition Starter Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V15803358 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V15803347 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Body measures for increased safety requirements [5C1],Hybrid propulsion system PHEV [0K3]or Central locking system "Keyless Entry" [4F2] or Central locking system "Keyless Entry" without deadlock [4I3]without alternative drive module [0K0] | View on Amazon |
| VEMO | V15803348 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Central locking system "Keyless Entry" [4F2] or Central locking system "Keyless Entry" without deadlock [4I3]without alternative drive module [0K0] | View on Amazon |
| WELLS | 1S17905 | 🇺🇸 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.
4 Ignition Starter Switch parts for the 2020 Audi S3 come from 2 brands — VEMO and WELLS.
The Economy section: 1 option from VEMO. VEMO V15803358 is listed in this group.
Standard Replacement: 3 parts, from VEMO and WELLS. A representative part number is VEMO V15803347.
Listed part numbers: VEMO V15803358, VEMO V15803347 and VEMO V15803348, plus the other parts above.
Multi-Function Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ÜRO PARTS | 7M0951253A | 🇺🇸 US 🇨🇦 CA 🇲🇽 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.
One part is listed for the 2020 Audi S3 — ÜRO PARTS 7M0951253A.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN Popular | ELP0078 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Brown, with .55-.85 Bar | View on Amazon |
| WALKER PRODUCTS | 2561061 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Brown | View on Amazon |
| WALKER PRODUCTS | 2561033 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 2.15-2.95 Barblue | View on Amazon |
| WALKER PRODUCTS | 2561102 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 0.30-0.60 BARGreen | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Popular | 2011754 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light0.55-0.85 BAR | View on Amazon |
| HELLA Popular | 008280001 | 🇺🇸 US | 1-Pin ConnectorColor: Green or Brown | View on Amazon |
| HELLA Popular | 008280031 | 🇺🇸 US | 1-Pin ConnectorColor: Brown | View on Amazon |
| BECK/ARNLEY | 2011983 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with Light2.15-2.95 BAR | View on Amazon |
| HELLA | 009600241 | 🇺🇸 US | 1-Pin ConnectorColor: Black or Color: Blue | View on Amazon |
| HELLA | 009600281 | 🇺🇸 US | 1-Pin ConnectorHousing Color: Green | View on Amazon |
| ROSTRA | 501269 | 🇺🇸 US | with Brown Connector | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS489 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Terminal Quantity: 2 | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS665 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | BlackColor: Green | View on Amazon |
| WELLS | 1S6875 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Gender: Female | View on Amazon |
| WELLS | 1S16087 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 0.3 - 0.6 Barwith 1 Pins | View on Amazon |
| WELLS | 1S12101 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 2.15 - 2.95 Barwith 1 Pins | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2OPS0303 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Dark Bluewith 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.
17 Oil Pressure Sender / Switch parts are listed for the 2020 Audi S3, from HELLA, WALKER PRODUCTS, WELLS and 5 other brands. REIN ELP0078 carries the "Popular" badge.
Economy: 4 parts, from WALKER PRODUCTS and REIN. A representative part number is REIN ELP0078.
The Standard Replacement section: 12 options from HELLA, WELLS, BECK/ARNLEY and 2 other brands. BECK/ARNLEY 2011754 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Power Seat Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730475 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Electric seat adjustment F | 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.
This group shows a single part: VEMO V10730475.
Trunk Lid / Tailgate Release Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| 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.
This group shows a single part: VEMO V10730653.
Turn Signal Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730551 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits drive select [2H6] or Drive select and magnetic damper [2H7]Air Bag For NAR [4UB] or AIB Airbag For driver and front passenger with knee airbag and front passenger airbag deactivation [4UP] | 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.
One part is listed for the 2020 Audi S3 — VEMO V10730551.
Buying Electrical Switch & Relay Parts for a 2020 Audi S3
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 2.0L L4 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 Ignition Starter Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2020 Audi S3?
Our catalog currently lists 31 electrical switch & relay parts for the 2020 Audi S3 across 9 subcategories and 13 brands, covering the 2.0L L4 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 S3?
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 S3 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 S3?
Every part on this page is matched to the 2.0L L4 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 S3
Electrical Switch & Relay Parts for Other Audi S3 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.