2017–2024 Audi A4
By Tom Becker ✓ Certified Mechanic · Published Sep 21, 2026 · Updated Nov 7, 2026
Save $135 by doing it yourself! Shop cost: $150
Quick answer: Replace Fog Light Bulb on a 2017–2024 Audi A4 is rated Moderate and takes about 30 minutes. You'll need 7 tools for this job, and parts cost about $15. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| H11 Halogen Fog Light Bulb | H11LLB1 | $15.00 | |
| H11 LED Fog Light Bulb Optional | H11LED1 | $30.00 |
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Follow these steps carefully
Park the 2017-2024 Audi A4 Premium on level ground, set the parking brake, and switch fog lights off. Access is often through a wheel-liner flap, under-tray opening, or by removing the fog-light bezel. Wear gloves — oils from skin shorten halogen bulb life.
Turn the plastic access cover counterclockwise or unclip it. On some 2017-2024 Audi A4 Premium models you must unbolt the fog-lamp housing from the bumper to reach the bulb.
Unplug the electrical connector. Release the wire retainer clip or twist the bulb socket counterclockwise per the 2017-2024 Audi A4 Premium design. Pull the old bulb straight out — do not force a stuck bulb sideways.
I pull the bulb straight out and never force it sideways — I've snapped a bulb base forcing one before, and fishing the pieces out is delicate work.
Compare base type (H8/H11/LED module, etc.) to the old bulb. Seat the new bulb fully in the 2017-2024 Audi A4 Premium housing and re-secure the retainer or twist-lock.
Plug the connector back in until it clicks. Switch on the ignition and fog lights to confirm both sides work on the 2017-2024 Audi A4 Premium. Aim should look level; adjust only if the housing was moved.
I confirm both fog lights work before final reassembly — I've closed up with one side dark before, and reopening the bumper is a job I avoid twice.
Refit the access cover, housing bolts, and wheel liner/under-tray fasteners. Confirm no loose liner near the 2017-2024 Audi A4 Premium tire. Recheck fog-light operation one final time.
I confirm no liner hangs near the tire before the final fog-light check — I've seen a loose liner rub through on the first drive, and the noise is unmistakable.
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
2017–2024
2017–2024
2017–2024
2004–2008
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