BMW X3 Service & Repair Manual > Oil pressure/oil temperature/oil gauge: Removing and installing/replacing oil pressure switch (N47 D20 O1)
IMPORTANT:
When working on the oil, coolant or fuel circuit, you must protect the alternator against dirt
contamination.
Cover alternator with suitable materials.
Failure to comply with this procedure may result in an alternator malfunction.
Necessary preliminary work:
Remove I ...