Bmw Valvetronic Eccentric Shaft Actuator Replacement
By the Editorial Staff
March 24, 2026
Everything You Need To Know About BMW N55 & S55 Valvetronic Eccentric Shaft Replacement Engineers have been looking for ways to improve the internal combustion engine since its creation. All high-mileage Valvetronic systems have trouble with their eccentric shaft actuators, so replacing it is more of a when not an if. Fear not, though, as the eccentric shaft replacement process.
The eccentric shaft is a vital part of your BMW's Valvetronic system, responsible for adjusting the lift of the intake valves without using a traditional throttle body. As the eccentric shaft rotates, it changes the position of intermediate rocker arms, controlling how much the intake valves open - which directly affects engine airflow, fuel economy, emissions, and throttle response. About this item Replace Part Numbers - Eccentric Shaft Actuator #11377603979, 11377599021, VDO A2C5328032080, VDO A2C53280320 Compatibility - for 2010-2019 BMW 135I 228I 320I 328I 335I 428I 528I X1 X3-X6 Z4 M3 435I 535I 640I 740I ActiveHybrid 3/5/7 M235I High Quality - Manufactured with the highest quality materials to create a strong, Longer service life due to high.
Understanding the BMW Eccentric Shaft Sensor/Actuator BMW's Valvetronic system is a key component of its efficient and high-performance engines, offering precise control over valve lift for improved fuel efficiency and performance. Central to this system is the eccentric shaft, eccentric shaft position sensors, and actuators. These components work together to fine-tune the engine's airflow.
The replacement valvetronic motor was covered, supposedly. Now they want to replace the valvetronic shaft and oil spray nozzle, which are separate parts (?) for $3568. When replacing the valvetronic motor it is often a good idea to replace the eccentric shaft as well but it requires some special tools.
STEP 1 - Review Installation Procedure Review online install videos by searching for, "Remove Replace Install Valvetronic Motor Actuator Eccentric Shaft BMW N20 N55 S55 N54 Torque Specs" to familiarize yourself with procedure and required tools. The N55 engine contains an eccentric shaft that controls the variable valve lift of the intake valves. This system is known as Valvetronic.
This shaft may require replacement due to needle bearing failure or wearing at the worm drive for the actuator due to poor lubrication. This kit includes everything you need to professionally replace your eccentric shaft. Kit Includes: - (1) Valvetronic.
How to replace Bmw N55 valvetronic eccentric shaft and motor. BMW N55 crank no start. How to fix a no crank no start problem on your 2011 BMW E70 X5, this will also work on most BMWs.