EGR coolerBMW
BMW B47 EGR Cooler
B47 EGR cooler condition matters before buying because coolant loss, recall history, and emissions faults can hide behind a normal-looking dashboard.
Repair difficulty
Medium
Estimated cost
Medium to high depending on access and whether associated parts are replaced.
Affected models and engines
- BMW B47 diesel models including 1 Series, 3 Series, 5 Series, X3, and related MINI models
Symptoms
- Coolant loss
- Exhaust smell
- Verminderd vermogen
- EGR or DPF warnings
Why it fails
- Thermal cycling stresses the cooler.
- Soot and condensation can contaminate the EGR path.
- Recall/campaign work may be incomplete or poorly documented.
Checks before buying
- Check BMW recall/campaign history.
- Inspect coolant level and EGR area.
- Scan EGR command, DPF load, and stored emissions faults.
- Ask for proof of cooler replacement where applicable.
Fault codes to investigate
Fault codes guide diagnosis; they do not confirm a part without live data, inspection, service history, and repeat testing.
Related research
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