Tag: P0174 BMW M54

Diagnosing a 2005 BMW X5 E53 with fault codes P0171 P0174. This will also help with diagnostic BMW’s 1999 to 2006 E46, E39, E85 with a M52 or M54 engine. This is a common part that goes bad on the the BMW M54 and M52 engine, the part number is part #1727176. The part is know as the Engine Air Inlet Manifold System 7mm Vacuum Cap. Please share if this part was missing or cracked on your car, thanks.