Genuine BMW 11-31-7-830-159 Timing Chain Tensioner Rail Upper Rear

The Genuine BMW 11-31-7-830-159 is an upper rear timing chain tensioner rail designed to guide and maintain proper timing chain alignment on the exhaust side of the engine. This OEM replacement component is essential for maintaining precise engine timing and preventing excessive timing chain wear.

Key Features:

• Upper rear timing chain guide rail for exhaust side camshaft
• Manufactured from high-quality composite material to exact OEM specifications
• Maintains proper timing chain tension and tracking
• Direct replacement for worn or damaged original equipment
• Genuine BMW part ensures precise fit and reliable performance

Over time, timing chain rails can wear down due to constant friction and heat exposure, leading to excessive chain slack and potential engine noise. Replacing worn guide rails with genuine BMW components helps restore proper chain operation and protects critical engine timing components from premature failure.

Cross-Reference Numbers: 11 31 7 830 159, 11.31.7.830.159, 11317830159