Original BMW Timing Chain Guide Bearing Bolt for N20, N26, N51, N52, N53, N54, N55, and S55 Engines in BMW 1–7 Series, M2, M3, M4, X1, X3, X4, X5, X6, and Z4 (2006–2021)

On the timing side of the engine, Original BMW bolt 11-31-7-592-878 is the bearing bolt that holds the timing chain guide and tensioner rail to the engine block on 2006–2021 BMW models with N20, N26, N51, N52, N54, N55, and S55 engines. With the rail held at its pivot, the guide can control the position and tension of the chain. BMW names it simply "bolt." It weighs 24 g (0.85 oz), is made in Germany, and is sold as a single piece.

Original BMW Parts carry a 24-month parts warranty.

This bolt secures the timing chain guide to the block, so it is part of the timing system. BMW began producing 11-31-7-592-878 in March 2010. It replaces the earlier 11-31-1-439-850 and is marked backward compatible, so it also fits engines built with the earlier number. BMW's parts data puts it on four-cylinder N20 and N26 engines, six-cylinder N51, N52, N53, N54, and N55 engines, and the S55 in the F80 M3, F82 M4, and F87 M2 Competition.

Technical Details

• Manufacturer: BMW (genuine)
• Part number: 11-31-7-592-878
• BMW part name: bolt, timing chain guide bearing
• Weight: 24 g (0.85 oz)
• Production start: March 2010
• Replaces: 11-31-1-439-850, backward compatible
• Sold individually, one piece
• Made in Germany
• Warranty: 24 months

Common Questions

Will this replace 11-31-1-439-850?
Yes. BMW supersedes that number with 11-31-7-592-878 and marks the change backward compatible.

What does this bolt hold?
It secures the timing chain guide or tensioner rail to the block.

Fitment & Compatibility

Use the table below to verify the year and submodel for your build. PMB Performance has spent over 20 years matching parts to vehicles and can verify this against your VIN.