BMW 3 Series Coupe Engine thermostat replacement Cost
2003–2006 · Engine, Fuel & Emissions system
Typical range
$185–$333
Parts + labour
Labour hours
0.7–3h
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. BMW 3 Series Coupe thermostat replacement costs $185–$333.
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?
Engine thermostat replacement on a BMW 3 Series Coupe typically takes 0.7–3 hours at a garage.
How often does this need to be done?
For a BMW 3 Series Coupe, 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 BMW 3 Series Coupe
- ABS hydraulic unit replacement$425–$765
- ABS sensor replacement$175–$315
- ABS system bleeding$140–$252
- AC compressor clutch replacement$350–$630
- AC compressor replacement$375–$675
Engine thermostat replacement cost on similar cars
- MERCEDES BENZ E-Klasse Coupe and predecessors$185–$333
- AUDI A5$185–$333
- SAAB 9-3 Coupe$185–$333
- PORSCHE 911 Carrera 4$204–$366
- FORD Mustang$183–$336
Get the exact price for your BMW 3 Series Coupe
Prices vary by year, engine and location. Tell us about your specific car.
Get my price estimate →