FOR BMW 3 5 7 SERIES X3 X5 E90 E60 E53 3.0 D ENGINE CRANKCASE OIL BREATHER VALVE

X5 (E53): 3.0 d (2003 – 2007) | 211 hp, 218 hp. X SERIES (E53, E70, E83). 5 SERIES (E60 & E61). Maintenance Tip Symptoms of a failing breather valve include blue exhaust smoke, increased oil consumption, and a "whistling" sound from the engine bay.