![]() It’s basically a camshaft on top of the intake camshaft that controls how far open the valves move during one rotation of the intake camshaft. ![]() The motor itself is pretty reliable and does not fail too often. It is responsible for actuating an eccentric shaft that adjusts intake valve lift. The electric valvetronic motor was first on normally-aspirated engines but is now common on the turbocharged vehicles as well. The Valvetronic system on your bmw is a variable valve lift setup which, in combination with variable valve timing, allows the intake valve timing to be infinitely adjustable. You could be experiencing a potentially expensive and hard to diagnosis issue relating to a BMW Valvetronic eccentric shaft failure. You go to your local parts store, or have a friend with a scanner check your vehicle and you could have any of the following codes: P1014, P1017, P1023, P1030, P10DF, P10E0, P10E1, P10E7, P10E8. A service engine soon or check engine (CEL) appears on the dash. Shortly after, you get a light on you dash. You start the car and there feels to be a slightly rough idle, but other than that, all is ok. You go out to your vehicle unlock the doors, and before you even start the vehicle, you notice a terrible clicking/ binding noise coming from the engine bay. BMW Valvetronic eccentric shaft failure can happen suddenly.
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