Q: A BMW 318i sedan detected fault code as crankshaft and intake camshaft phase error. Is it better to replace the intake, VANOS solenoid valve or replace the intake camshaft sensor? What should be paid attention to when replacing?
A: The VANOS units on the intake and exhaust sides are different, and are distinguished by marking “EIN IN” and “AUS OUT”. When replacing parts, you must pay attention to the part number, because the VANOS unit used on the engine can only be distinguished by the part number. If the VANOS unit is installed incorrectly, it may cause serious damage to the engine. The specific location is shown in the figure below. Of course, replacing both at the same time is safer for troubleshooting.