Hella Camshaft Position Sensor - 009121011

As it turns, its lobes push the valves open, directly or through followers or rocker arms, then let the springs close them. Lift and duration determine how much air the engine can breathe.

A ticking or tapping from the top of the engine, loss of power, misfires, and visibly worn or pitted lobes when inspected. Metal particles in the oil can also point to cam or follower wear.

Often. More aggressive camshafts may need stronger valve springs, adjusted valve timing and an engine tune to run properly. Check the maker's requirements in the product details.

It requires removing the timing drive, locking the engine at the correct timing with engine-specific tools and setting the timing precisely. Mistakes can damage the valves and pistons, so it is best done by an experienced technician.

Compare the part numbers listed on this page with the number on your old part or in your vehicle's parts catalog, and check the fitment information. If you are unsure, contact us with your VIN before ordering.