INA ZC0021 Engine Timing Chain - Lower

Engine Timing Chain for BMW V8 Applications

INA ZC0021 is an engine timing chain for the lower timing drive, used in crank-to-cam synchronization on select BMW V8 models. It is built as part of a repair solution for timing drive components, with an emphasis on accurate gear ratio transfer, reliable operation, and lower maintenance demands.

• Engine timing chain for the lower timing drive
• Crank-to-cam application for precise valve timing control
• Fits 1997-2003 BMW 540i, lower
• Fits 2000-2003 BMW X5, lower
• Fits 1997-2001 BMW 740i, lower
• Fits 1996-2001 BMW 740iL, lower
• INA part number ZC0021 for timing drive service

Detailed Product Information

Built for timing drive repair work, this INA timing chain helps maintain the correct relationship between the crankshaft and camshaft in BMW applications that use a lower chain layout. It is a direct-fit service part for the listed BMW 540i, BMW X5, BMW 740i, and BMW 740iL applications, and it cross-references BMW 11 31 1 741 746 and INA Global Number 5530021100 for the same application. The INA ZC0021 is intended for technicians and buyers replacing worn timing components in vehicles where accurate valve timing is critical to engine operation.

Common Repair Uses

• Timing chain stretch or wear
• Noise from the lower timing drive
• Loss of cam timing accuracy
• Service replacement during engine timing repair
• Restoration of crank-to-cam synchronization

Installation Notes

Verify engine code and timing drive configuration before installation. This part is listed for the lower position only, so confirm the crank-to-cam routing matches the vehicle application. Timing drive service should be performed with proper locking and alignment procedures to preserve valve timing.

Quality Assurance

INA supplies timing drive components as repair-focused solutions for chain and belt systems, with an emphasis on correct gear ratios, dependable operation, and reduced maintenance requirements.