BMW 3 Series Engine Problems

The BMW service intervals are set by engine time and indicated on the dash when you first turn the ignition on. If you choose not to follow that changing the engine oil and filter every 10,000 km would be fine; the transmission oil is normally drained at every Level 2 inspection and service, and that generally equates to around 80,000 km.

Your first port of call is to the mechanic. He fitted the part and it’s his responsibility to sort the problem out, including any damage the failed fan caused to other parts. If the part he fitted is determined to be faulty, he is the one who should make the claim against the manufacturer, not your daughter.