2020 Audi A4 Allroad Electrical Bulb & Socket Parts

This table covers the bulbs in the reverse lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs. Read more

HELLA supplies the 5 Back Up / Reverse Lamp Bulb parts for the 2020 Audi A4 Allroad. HELLA 921 carries the "Popular" badge.

The Extended Life section lists 2 options from HELLA — grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. HELLA 921LL is listed in this group.

The Standard Replacement section lists 3 options from HELLA — built to original-equipment specification. HELLA 921 is listed in this group.

Listed part numbers: HELLA 921, HELLA 921LL and HELLA DE3175LL, plus the other parts above.

This table covers the bulbs in the fog and driving lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs. Read more

2 Fog / Driving Lamp Bulb parts for the 2020 Audi A4 Allroad come from 2 brands — HELLA and PHILIPS.

Listed part numbers: HELLA H21W, plus the other parts above.

This table covers the bulbs in the glove-box lamp. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs. Read more

3 Glove Box Light Bulb parts for the 2020 Audi A4 Allroad come from 2 brands — SYLVANIA and PHILIPS.

Extended Life: 1 part, from SYLVANIA. A representative part number is SYLVANIA 2821LL.

Standard Replacement: 2 parts, from PHILIPS and SYLVANIA. A representative part number is PHILIPS 12256.

This group includes SYLVANIA 2821LL, PHILIPS 12256 and SYLVANIA 2821.

This table covers the bulbs that light the headlamps. Typical signs include a dark lamp, a flicker over bumps, or a bulb that keeps failing on one side. Avoid touching a halogen capsule. Repeated failure in one socket is usually the socket or ground, not the bulb. Read more

5 Headlamp Bulb parts for the 2020 Audi A4 Allroad come from 5 brands — SYLVANIA, ÜRO PARTS, WAGNER and 2 other brands. The "Popular" part is PHILIPS H8.

In the HID (intense white light) grade, SYLVANIA, ÜRO PARTS and WAGNER supply 3 parts: grouped under the catalog's "HID (intense white light)" designation — the notes column spells out what sets them apart. A representative part number is SYLVANIA D5S.

Standard Replacement: 2 parts, from PHILIPS and HELLA. A representative part number is PHILIPS H8.

Part numbers include PHILIPS H8 and SYLVANIA D5S, among others listed above.

This table covers the sockets that hold a headlamp bulb in the housing. Typical signs include a flicker over bumps, melted plastic, or a bulb that will not stay seated. Dielectric grease on the contacts slows corrosion. Do not force a bulb into a heat-damaged socket. Read more

3 Headlamp Socket parts for the 2020 Audi A4 Allroad come from 2 brands — STANDARD MOTOR PRODUCTS and ACDELCO.

This group includes ACDELCO PT2298, STANDARD MOTOR PRODUCTS HP3835 and STANDARD MOTOR PRODUCTS S553.

This table covers the bulbs in the turn-signal lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs. Read more

4 Turn Signal Lamp Bulb parts are listed for the 2020 Audi A4 Allroad, from HELLA, PHILIPS and SYLVANIA.

The Extended Life section: 1 option from PHILIPS. PHILIPS PY21WLL is listed in this group.

The Standard Replacement section: 1 option from HELLA. HELLA 7507 is listed in this group.

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

This group includes PHILIPS PY21WLL, HELLA 7507 and HELLA PY21WTB and the remaining parts above.