Audi A3 Parts & Spares
Fitment guides, buying advice and live UK eBay prices for the Audi A3 — always confirm against your reg or VIN.
The Audi A3 is a familiar sight on UK roads, which is good news when something needs replacing: parts are plentiful and prices stay competitive. Owners search most often for headlight, brake pads and timing belt — but the model spans different engines, trims and, on most generations, a mid-life facelift, so the same-looking part isn't always the right one.
Use the guides below to match a part to your exact Audi, then check live prices from trusted UK eBay sellers. Every part page lists what to confirm before you buy, so you avoid the classic wrong-part return.
Most-searched Audi A3 parts
Check halogen vs xenon AND left/right (driver/passenger). Pre-facelift and facelift lenses differ — match your reg.
Front and rear are different sizes; some trims (GTI/R/sport) run bigger brakes with their own pad. Match your caliper, not just the model.
Belt routing varies by engine code (1.6 TDI vs 2.0 TDI vs 1.4 TSI). Match your engine code, not just the model.
Diesel only. Match the engine code — plug length/voltage differs between 1.6 and 2.0 TDI.
Turbo part numbers are engine-code specific. Confirm the exact code stamped on your old unit where possible.
Front and rear differ; some have integrated ABS sensors in the hub — match the right type.
How to check a part fits your Audi A3
The same Audi can be sold with several engines and trims, and most generations get a mid-life facelift that changes lights, bumpers and trim. Before you buy:
- Enter your registration to filter out the obvious mismatches.
- Match your engine code for anything attached to the engine.
- Check your trim — sportier versions often use bigger brakes and specific parts.
- Confirm pre-facelift vs facelift if your car sits near the changeover year.
- Best of all, match the part number on the unit you’re replacing.
Full walkthrough: how to check a part fits your exact car.
Buying Audi A3 parts: genuine, aftermarket or used
Genuine and OEM parts are the safe pick for safety-critical or hard-to-reach components and cars you’re keeping long term. For routine wear items, a reputable aftermarket brand is usually as good for far less. And for pricey assemblies on an older Audi A3 — alternators, starters, lights, panels — a well-rated used or reconditioned part can be the sensible choice. See OEM vs aftermarket vs used for the full rundown.
All Audi A3 parts
Audi A3 parts — common questions
How do I know a part fits my Audi A3?
Start with your registration to filter obvious mismatches, then confirm the details that matter: your engine code (for anything attached to the engine), your trim level, and whether your car is pre-facelift or facelift. The surest check is to match the part number stamped on the unit you're replacing.
Where's the best place to buy Audi A3 parts?
For most owners, eBay's UK sellers offer the widest choice and the keenest prices, covering genuine, aftermarket and used parts. Buy through eBay's checkout so you're covered by the Money Back Guarantee, and favour sellers with strong feedback and a clear returns policy.
Should I buy genuine Audi parts or aftermarket?
It depends on the part. Genuine or OEM makes sense for safety-critical or hard-to-reach components and cars you're keeping long term. For routine wear items — brakes, filters, suspension arms — a reputable aftermarket brand is usually as good for far less.
Are used Audi A3 parts safe to buy?
They can be a smart choice for expensive assemblies like alternators, starters, lights and body panels, especially on an older Audi A3. Check the seller's feedback, confirm the part number matches, and prefer sellers who state condition and offer a returns window.