Genuine BMW 11-31-1-721-641 Upper Timing Chain Slide Rail

The Genuine BMW 11-31-1-721-641 is an OEM upper timing chain slide rail designed for precise fitment and reliable performance in BMW M42 and M44 engines. This critical timing system component guides the timing chain along its path, reducing friction and preventing chain slap while maintaining proper tension throughout the engine's operational range.

Key Features:

• Genuine BMW OEM part manufactured to factory specifications
• Upper slide rail design for optimal timing chain guidance
• Precision-engineered for M42 B18 (1.8L) and M44 B19 (1.9L) 4-cylinder engines
• Durable construction to withstand high temperatures and engine stress
• Direct replacement for worn or damaged timing chain rails
• Maintains proper timing chain alignment and reduces wear

This timing chain slide rail is a genuine BMW component, ensuring exact fit and optimal performance. Regular inspection and replacement of timing chain rails is essential for preventing timing chain failure and maintaining engine reliability. One rail required per vehicle.