AUDI A8 Thermostat replacement Cost
2003–2005 · Engine, Fuel & Emissions system
Typical range
$341–$2.7k
Parts + labour
Labour hours
1–4h
At a typical garage
The thermostat regulates engine temperature by controlling coolant flow to the radiator. A stuck-closed thermostat causes overheating; a stuck-open one keeps the engine running cold, increasing wear and reducing heater output. AUDI A8 thermostat replacement costs $341–$2655.
Typical parts included
- Thermostat housing
- Thermostat
What affects the price
- OEM vs aftermarket thermostat (OEM strongly recommended for reliability)
- Whether the housing and gasket are replaced too
- Coolant top-up cost after the job
Common questions
How long does this repair take?
Thermostat replacement on a AUDI A8 typically takes 1–4 hours at a garage.
How often does this need to be done?
For a AUDI A8, this is typically needed thermostats are replaced on failure; typical lifespan is 80,000–100,000 miles.
Other engine, fuel & emissions system repairs on the AUDI A8
- ABS hydraulic unit replacement$468–$842
- ABS sensor replacement$193–$347
- ABS system bleeding$154–$277
- AC compressor clutch replacement$385–$693
- AC compressor replacement$413–$743
Thermostat replacement cost on similar cars
- MERCEDES BENZ S-Klasse and predecessors$275–$495
- BMW 7 Series$275–$495
- JAGUAR XJ$275–$495
- VOLKSWAGEN Phaeton$275–$495
- MASERATI Quattroporte$300–$540
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