BMW Valvetronic Eccentric Shaft Actuator Kit - 11377603979KT1

This electric actuator sits inside the cylinder head and controls the position of the intermediate shaft to control intake variable valve lift. This Valvetronic actuator is part of BMW's third generation of the system and works both as the actuator and the sensor which were previously separate parts.

When this actuator fails it will typically be at the minimal lift position which means the engine develops no more power than it can at idle speed. It is located in a recess in the cylinder head and involves the removal of the injectors, ignition coils, and recess wells in order to remove the actuator.

Please note: Because of the engine bay packaging of F8X S55 powered cars the carbon v brace and associated chassis reinforcement parts must be removed to gain access to the engine. Per BMW, the hardware that secures these parts in place is one-time use only. There are two different kits available for this hardware based on whether you have a 5-bolt M8 or 3-bolt M10 strut mount hardware:

For vehicles with x5 M8 strut mount please see KIT-31106854219KT
For vehicles with x3 M10 strut mount please see KIT-31106854219KT1