2020 Audi A3 Electrical Switch & Relay Parts

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. Read more

One part is listed for the 2020 Audi A3 — HELLA 933332451.

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. Read more

3 A/C Refrigerant Pressure Switch parts are listed for the 2020 Audi A3, from FOUR SEASONS, UAC and VNE. All of them fit every engine offered in the 2020 A3.

Part numbers include FOUR SEASONS 37427, UAC SW11224C and VNE 4016002.

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. Read more

One part is listed for the 2020 Audi A3 — STANDARD MOTOR PRODUCTS RY577.

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. Read more

2 Accessory Power Relay parts for the 2020 Audi A3 come from 2 brands — HELLA and STANDARD MOTOR PRODUCTS. Every part fits both the 1.4L L4 Turbocharged and the 2.0L L4 Turbocharged.

This group includes HELLA 933332451 and STANDARD MOTOR PRODUCTS RY577.

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. Read more

2 Brake Light Switch parts are listed for the 2020 Audi A3, from ÜRO PARTS and WELLS. All of them fit every engine offered in the 2020 A3.

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.

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. Read more

One part is listed for the 2020 Audi A3 — HELLA 933332451.

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. Read more

2 Fuel Pump / Circuit Opening Relay parts are listed for the 2020 Audi A3, from HELLA and STANDARD MOTOR PRODUCTS. All of them fit every engine offered in the 2020 A3.

This group includes HELLA 933332451 and STANDARD MOTOR PRODUCTS RY577.

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. Read more

2 Horn Relay parts for the 2020 Audi A3 come from 2 brands — HELLA and WELLS. 1 part fits every engine; the other 1 is engine-specific.

Part numbers include HELLA 965453801 and WELLS 1R2303.

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. Read more

7 Ignition Starter Switch parts for the 2020 Audi A3 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.

3 further parts sit outside the graded sections, with the same engine-level match.

This group includes VEMO V15803358, VEMO V15803347 and VEMO V15803348 and the remaining parts above.

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. Read more

3 Multi-Function Relay parts are listed for the 2020 Audi A3, from BOSCH, ÜRO PARTS and WELLS. All of them fit every engine offered in the 2020 A3.

Listed part numbers: BOSCH 0986AH0307, ÜRO PARTS 7M0951253A and WELLS 1R1007.

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. Read more

19 Oil Pressure Sender / Switch parts are listed for the 2020 Audi A3, from BECK/ARNLEY, HELLA, WALKER PRODUCTS and 5 other brands. REIN ELP0078 carries the "Popular" badge. 1 part fits every engine; the other 18 are engine-specific.

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.

3 ungrouped parts are not assigned to a grade, with the same engine-level match.

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. Read more

This group shows a single part: VEMO V10730475.

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. Read more

This group shows a single part: HELLA 933332451.

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. Read more

This group shows a single part: VEMO V10730653.

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. Read more

One part is listed for the 2020 Audi A3 — VEMO V10730551.

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. Read more

One part is listed for the 2020 Audi A3 — STANDARD MOTOR PRODUCTS RY577.