BMW 3 Series Sedan Key fob battery replacement Cost
2002–2005 · Engine, Fuel & Emissions system
Typical range
$33–$89
Parts + labour
Labour hours
0.2–0.5h
At a typical garage
The 12 V battery starts the engine and powers electronics when the car is off. Most batteries last 3–5 years; warning signs include slow cranking, a battery warning light, and electrical gremlins. BMW 3 Series Sedan battery replacement typically costs $33–$89 including the new battery.
Typical parts included
- Key fob battery
What affects the price
- Battery group size and CCA (cold cranking amps) rating
- OEM vs aftermarket brand (Bosch, Varta, Optima)
- Whether the ECU requires a reset or recalibration after replacement
Common questions
How long does this repair take?
Key fob battery replacement on a BMW 3 Series Sedan typically takes 0.2–0.5 hours at a garage.
How often does this need to be done?
For a BMW 3 Series Sedan, this is typically needed every 3–5 years, or sooner in extreme hot or cold climates.
Other engine, fuel & emissions system repairs on the BMW 3 Series Sedan
- ABS hydraulic unit replacement$383–$701
- ABS sensor replacement$158–$289
- ABS system bleeding$126–$231
- AC compressor clutch replacement$315–$578
- AC compressor replacement$338–$619
Key fob battery replacement cost on similar cars
- MERCEDES BENZ C-Klasse and predecessors$32–$58
- AUDI A4$32–$58
- VOLVO S60$35–$64
- CADILLAC BLS Wagon$32–$58
- SAAB 9-3 Sport Sedan$32–$58
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