BMW Single VANOS Piston Bearing & Spacer Replacement Kit — M50TU, M52, S50 US & S52

When rebuilding the Single VANOS unit on your BMW, don't overlook the internal piston bearing hardware. Our Single VANOS Piston Bearing & Spacer Replacement Kit includes the internal spacer and washers used in the VANOS piston bearing assembly, allowing you to replace worn or damaged components while the VANOS unit is apart.

Over time, wear within the VANOS piston bearing assembly can create excessive internal movement and contribute to the familiar Single VANOS rattle. Replacing the bearing hardware along with the VANOS piston seals provides a more complete rebuild and addresses multiple common wear points inside the unit.

These internal components are not typically offered separately by BMW, making this kit an easy solution when rebuilding your original VANOS unit rather than replacing the complete assembly.

Package Includes

• 1 Single VANOS Piston Bearing Spacer
• 2 VANOS Piston Bearing Washers
• Services one complete Single VANOS piston assembly
• Direct replacement for the original internal bearing hardware

Complete Your VANOS Rebuild

When rebuilding a Single VANOS unit, we recommend inspecting and servicing both the piston seals and bearing assembly. Worn seals can reduce VANOS performance, while excessive clearance within the bearing assembly can contribute to VANOS rattle.

For a more complete repair, pair this kit with one of our Single VANOS seal kits or complete VANOS rebuild kits.

Common Symptoms of VANOS Wear

A worn or malfunctioning Single VANOS system may contribute to:

• Loss of low- and mid-range torque
• Reduced engine performance
• Uneven power delivery
• VANOS rattle or mechanical noise
• Rough or uneven idle
• Sluggish acceleration
• Increased fuel consumption
• VANOS-related fault codes

Depending on the vehicle and type of VANOS failure, a fault code may not always be stored.

BMW Single VANOS Fitment Guide

M50TU

M52

S50 US

S52 US

Engine Compatibility

Designed for BMW Single VANOS engines including:

M50TU • M52 • S50B30US • S52B32

Important Fitment Note

This kit is for Single VANOS engines only. It is not compatible with M52TU or M54 Dual VANOS engines.

BMW changed engines and VANOS systems during several model production runs, so fitment should always be verified by engine code and production date rather than chassis alone.

Whether you're eliminating VANOS rattle or completing a full Single VANOS overhaul, this Piston Bearing & Spacer Replacement Kit provides the internal hardware needed to properly refresh the original VANOS piston bearing assembly.