VANOS cam-timing system
Changes when the engine valves open and close.
At the camshaft drive ends, with control hardware depending on engine.
Cam phasing changes valve events relative to the crankshaft to suit load and speed.
Shifting an appointment earlier or later without changing the door’s size.
Timing faults or weak response may involve oil supply, solenoids, sensors or mechanical timing.
Usually condition-based rather than a routine replacement. Lubrication, overheating and the exact engine affect wear.
Internal-engine work is usually labor-intensive. Diagnosis and the engine code determine the repair scope.
VANOS is BMW’s variable camshaft-timing system; it is not a turbocharger.
Equipped BMW petrol engines, including the B38 family documented in BMW technical training. The version and drive hardware vary.