Key features

• •Part Number OE: This Runfider Valvetronic actuator is designed for BMW vehicles equipped with N20, N55, and S55 engines (2010-2016). It is a direct replacement for OE part numbers 11377603979, 11377599021, and VDO A2C5328032080, ensuring seamless integration with factory systems. Compatible with multiple models including X1, X3, X4, X5, 135i, 228i, 335i, 428i, 435i, 528i, 535i, 640i, and 740Li. Always verify your vehicle's year, model, and engine type before purchase to ensure correct fitment.
• •Construction:Manufactured with strict quality control, this actuator undergoes rigorous testing to meet performance standards. Each unit is pre-lubricated to reduce initial wear and enhance longevity. Note: Due to shipping conditions, lubricant may oxidize and darken—this does not affect functionality. Simply wipe off excess residue before installation. The durable internal components ensure reliable operation under normal driving conditions.
• •About the product: If your BMW vehicle experiences symptoms such as unstable idling, engine stalling, engine malfunction light (EML) illumination, or difficulty starting, this replacement part can restore the correct valve mechanism adjustment to help resolve the above issues. This product complies with original factory specifications and design to ensure stable performance without modifying other vehicle functions.
• •Installation: For optimal performance, we recommend professional installation by a qualified BMW technician. The Valvetronic system requires precise calibration, and improper installation may lead to operational issues. If you are unfamiliar with BMW engine components, consult a professional to avoid potential problems. Includes all necessary hardware for a secure fit.
• •1-Year Warranty & Reliable Support: We offer a 12-month warranty on our products. During this period, we provide product replacement or refund services for any issues that arise. Please carefully review the compatibility information for this product before purchase to ensure it is suitable for your vehicle model.