2020 Audi A4 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

This group shows a single part: 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 for the 2020 Audi A4 come from 3 brands — FOUR SEASONS, UAC and VNE.

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

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

One part is listed for the 2020 Audi A4 — HELLA 933332451.

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 for the 2020 Audi A4 come from 2 brands — ÜRO PARTS and WELLS.

The Economy section lists 1 option from ÜRO PARTS — the catalog's value-priced group. ÜRO PARTS 5G0698459 is listed in this group.

In the Standard Replacement grade, WELLS supplies 1 part: built to original-equipment specification. A representative part number is WELLS 1S14224.

Part numbers include ÜRO PARTS 5G0698459 and WELLS 1S14224.

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

This group shows a single part: 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

This group shows a single part: HELLA 933332451.

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

One part is listed for the 2020 Audi A4 — 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

One part is listed for the 2020 Audi A4 — WELLS 1S17494.

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

4 Multi-Function Relay parts for the 2020 Audi A4 come from 3 brands — BOSCH, ÜRO PARTS and WELLS.

Part numbers include BOSCH 0986332209, BOSCH 0986AH0080 and ÜRO PARTS 7M0951253A, among others listed above.

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

13 Oil Pressure Sender / Switch parts for the 2020 Audi A4 come from 7 brands — WALKER PRODUCTS, HELLA, STANDARD MOTOR PRODUCTS and 4 other brands. The "Popular" part is REIN ELP0078.

The Economy section: 4 options from WALKER PRODUCTS and REIN. REIN ELP0078 is listed in this group.

Standard Replacement: 7 parts, from HELLA, ROSTRA, STANDARD MOTOR PRODUCTS and 2 other brands. A representative part number is HELLA 008280001.

2 further parts sit outside the graded sections, 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

One part is listed for the 2020 Audi A4 — VEMO V10730561.

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. Read more

This group shows a single part: VEMO V10730721.

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

One part is listed for the 2020 Audi A4 — 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

One part is listed for the 2020 Audi A4 — VEMO V10730458.