Original BMW Timing Chain Guide Bolt for N62 V8 545i, 550i, 645Ci, 650i, 745i, 750i, Alpina B7, and X5 (2002–2010)

Inside the N62 V8, this Genuine BMW bolt, 11-31-1-439-551, holds a timing chain guide in place on the 2002–2010 545i, 550i, 645Ci, 650i, 745i, 750i, Alpina B7, and X5. BMW names it simply Bolt, and it is also sold as a bearing bolt. It anchors the guide as part of the timing chain system, keeping the guide stable so the chain does not move excessively. Each bolt weighs 33 g (1.16 oz). Chain guides set the path the timing chain follows between the crankshaft and camshafts. The bolts that mount them carry steady load from a running chain.

Original BMW Parts carry a 24-month parts warranty.

BMW began producing this bolt in July 2001, and it carries no superseded number. It applies to both the first N62 and the later N62N version of the engine, from the 4.4-liter cars through the 4.8-liter 550i, 650i, 750i, and X5 4.8i. It does not appear on BMW's six-cylinder or later twin-turbo V8 engines, so a car without an N62 needs a different part.

Technical Details

• Manufacturer: BMW (Genuine)
• Part number: 11-31-1-439-551
• BMW parts name: Bolt
• Application: timing chain guide bolt (bearing bolt)
• Weight: 33 g (1.16 oz)
• Production start: July 2001
• Engines: N62 and N62N V8
• Warranty: 24-month parts warranty

Common Questions

What does this bolt hold?
It mounts a timing chain guide inside the N62 and N62N V8 engines.

Will it fit an X5 3.0i?
No. On the X5, it applies only to the V8 models: the 4.4i, 4.8i, 4.8is, and xDrive48i.

Fitment & Compatibility

Use the fitment table below to confirm year, model, submodel, and application notes before ordering. With over 20 years of parts and fitment experience, PMB Performance can match this to your VIN.