The 2025 Audi A4 Allroad has 3 electrical bulb & socket parts with verified fitment on this page — 3 part types and 1 brand, covering the 2.0L L4 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2025 Audi A4 Allroad, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. All 3 listed parts are Fog / Driving Lamp Bulb (1 part), Headlamp Bulb (1 part) and Turn Signal Lamp Bulb (1 part).
The 2025 Audi A4 Allroad came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
Every electrical bulb & socket part listed for the 2025 Audi A4 Allroad comes from PHILIPS.
Each part number listed for the 2025 Audi A4 Allroad opens a page with every vehicle that part fits.
Fog / Driving Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS | H21W | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
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.
One part is listed for the 2025 Audi A4 Allroad — PHILIPS H21W.
Headlamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS | H8 | 🇺🇸 US 🇨🇦 CA | High Beam | View on Amazon |
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.
One part is listed for the 2025 Audi A4 Allroad — PHILIPS H8.
Turn Signal Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS | 12174NA | 🇺🇸 US 🇨🇦 CA | Natural Amber | View on Amazon |
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.
This group shows a single part: PHILIPS 12174NA.
Buying Electrical Bulb & Socket Parts for a 2025 Audi A4 Allroad
On this vehicle, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination.
- 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, replace bulbs in pairs so both sides age together, and put a smear of dielectric grease on the new socket contacts.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Fog / Driving Lamp Bulb and Headlamp Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2025 Audi A4 Allroad?
Our catalog currently lists 3 electrical bulb & socket parts for the 2025 Audi A4 Allroad across 3 subcategories and 1 brand, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical bulb & socket problems on a 2025 Audi A4 Allroad?
Common symptoms include a lamp that flickers over bumps, melted or discolored socket plastic, or bulbs that keep failing early on one side. 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, replace bulbs in pairs so both sides age together, and put a smear of dielectric grease on the new socket contacts.
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 2025 Audi A4 Allroad 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 2025 Audi A4 Allroad?
Every part on this page is matched to the 2.0L L4 Turbocharged engine. Then repeated bulb failure in one position usually means a socket or ground problem, not bad bulbs — replace the socket rather than chase it. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2025 Audi A4 Allroad
Electrical Bulb & Socket Parts for Other Audi A4 Allroad 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.