Audi A4 Thermostat
Replacement thermostat — fitment, symptoms & live UK prices.
Fits Audi A4 — check your reg/VIN to confirm
Thermostat
£10–£40; some come as a full housing assembly.
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Will it fit my Audi A4?
Increasingly sold as a full housing unit with an integrated sensor on newer engines — check whether yours is thermostat-only or housing-and-all.
Tip: filter by your reg on eBay's compatibility check, or match the part number stamped on your old unit.
Signs your Audi A4 thermostat needs replacing
- Temp gauge slow to rise or overheating
- Poor heater performance (stuck open)
- Overheating in traffic (stuck shut)
- Coolant warning light
Fitting it yourself
Usually a housing with 2–3 bolts and a coolant hose — straightforward, but refill and bleed the cooling system properly after.
See Thermostat prices on eBayMore Audi A4 parts
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Live prices£10–£40; some come as a full housing assembly.
View on eBay