This page lists 30 electrical switch & relay parts for the 2020 Audi A5, across 12 part types, covering the 2.0L L4 Turbocharged engine. Every part shows its brand, manufacturer part number and fitment notes.
The switch and relay system on the 2020 Audi A5 covers the switches, relays and flashers that route power to everything the driver touches. The largest groups are Oil Pressure Sender / Switch (13 parts), Multi-Function Relay (4 parts) and A/C Refrigerant Pressure Switch (3 parts). The other 9 part types cover the remaining 10 parts.
The 2020 Audi A5 came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
12 brands supply electrical switch & relay parts for the 2020 Audi A5, led by HELLA (8 parts), WELLS (5 parts) and WALKER PRODUCTS (3 parts), plus 9 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 A5. 3 parts have it, including REIN ELP0078 (Oil Pressure Sender / Switch) and HELLA 008280001 (Oil Pressure Sender / Switch). Each part number opens a page with every vehicle that part fits.
A/C Condenser Fan Motor Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 933332451 | 🇺🇸 US 🇨🇦 CA | 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.
One part is listed for the 2020 Audi A5 — HELLA 933332451.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS | 37427 | 🇺🇸 US 🇨🇦 CA | Pressure Switch | View on Amazon |
| UAC | SW11224C | 🇺🇸 US 🇨🇦 CA | Pressure Transducer | View on Amazon |
| VNE | 4016002 | 🇺🇸 US 🇨🇦 CA | A5 Quattro | 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 A5, 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 |
|---|---|---|---|---|
| HELLA | 933332451 | 🇺🇸 US 🇨🇦 CA | 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.
This group shows a single part: HELLA 933332451.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ÜRO PARTS | 5G0698459 | 🇺🇸 US 🇨🇦 CA | A5 Sportback | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1S14224 | 🇺🇸 US 🇨🇦 CA | 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 A5, 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 1S14224 is listed in this group.
This group includes ÜRO PARTS 5G0698459 and WELLS 1S14224.
Fog / Driving Lamp Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 933332451 | 🇺🇸 US 🇨🇦 CA | 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.
One part is listed for the 2020 Audi A5 — HELLA 933332451.
Fuel Pump / Circuit Opening Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 933332451 | 🇺🇸 US 🇨🇦 CA | 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.
One part is listed for the 2020 Audi A5 — HELLA 933332451.
Horn Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1R2303 | 🇺🇸 US 🇨🇦 CA | 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.
This group shows a single part: WELLS 1R2303.
Multi-Function Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH | 0986AH0082 | 🇺🇸 US 🇨🇦 CA | Multi-Purpose Relay | View on Amazon |
| BOSCH | 0986332209 | 🇺🇸 US 🇨🇦 CA | Multi-Purpose Relay | View on Amazon |
| ÜRO PARTS | 7M0951253A | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS | 1R1007 | 🇺🇸 US 🇨🇦 CA | 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.
4 Multi-Function Relay parts are listed for the 2020 Audi A5, from BOSCH, ÜRO PARTS and WELLS.
This group includes BOSCH 0986AH0082, BOSCH 0986332209 and ÜRO PARTS 7M0951253A and the remaining parts above.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN Popular | ELP0078 | 🇺🇸 US 🇨🇦 CA | Brown, with .55-.85 Bar | View on Amazon |
| WALKER PRODUCTS | 2561148 | 🇺🇸 US 🇨🇦 CA | 2.15-2.95 Barblue | View on Amazon |
| WALKER PRODUCTS | 2561061 | 🇺🇸 US 🇨🇦 CA | Brown | View on Amazon |
| WALKER PRODUCTS | 2561102 | 🇺🇸 US 🇨🇦 CA | 0.30-0.60 BARGreen | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 008280001 | 🇺🇸 US | 1-Pin ConnectorColor: Green or Brown | View on Amazon |
| HELLA Popular | 008280031 | 🇺🇸 US | 1-Pin ConnectorColor: Brown | View on Amazon |
| HELLA | 009600281 | 🇺🇸 US | 1-Pin ConnectorHousing Color: Green | View on Amazon |
| ROSTRA | 501269 | 🇺🇸 US | View on Amazon | |
| STANDARD MOTOR PRODUCTS | PS665 | 🇺🇸 US 🇨🇦 CA | BlackColor: Green | View on Amazon |
| VEMO | V10720420 | 🇺🇸 US 🇨🇦 CA | From 08/28/2017To 07/31/2023 | View on Amazon |
| WELLS | 1S16087 | 🇺🇸 US 🇨🇦 CA | 0.3 - 0.6 BarGreen | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | PS776 | 🇺🇸 US 🇨🇦 CA | Fits A5 QuattroBlu | View on Amazon |
| WELLS | 1S17518 | 🇺🇸 US 🇨🇦 CA | 0.55 - 0.85 BarBrown | 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.
13 Oil Pressure Sender / Switch parts are listed for the 2020 Audi A5, from WALKER PRODUCTS, HELLA, STANDARD MOTOR PRODUCTS and 4 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: 7 options from HELLA, ROSTRA, STANDARD MOTOR PRODUCTS and 2 other brands. HELLA 008280001 is listed in this group.
2 ungrouped parts are not assigned to a grade, with the same engine-level match.
Power Window Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730721 | 🇺🇸 US | 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.
One part is listed for the 2020 Audi A5 — VEMO V10730721.
Radiator Fan Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 933332451 | 🇺🇸 US 🇨🇦 CA | 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.
This group shows a single part: HELLA 933332451.
Trunk Lid / Tailgate Release Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO | V10730458 | 🇺🇸 US 🇨🇦 CA | Coupe or Hatchback | 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 V10730458.
Buying Electrical Switch & Relay Parts for a 2020 Audi A5
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 Multi-Function Relay .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2020 Audi A5?
Our catalog currently lists 30 electrical switch & relay parts for the 2020 Audi A5 across 12 subcategories and 12 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 A5?
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 A5 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 A5?
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 A5
Electrical Switch & Relay Parts for Other Audi A5 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.