Original BMW Timing Chain Slide Rail for BMW M3, Z3 M Coupe and Roadster, and Z4 M Coupe and Roadster (2001–2008)

On the S54 inline-six, Original BMW slide rail 11-31-7-836-344 guides the twin timing chain in the E46 M3, Z3 M Coupe and Roadster, and Z4 M Coupe and Roadster. A timing chain rail controls the path of the chain between the sprockets and limits slap and vibration, working with the tensioner to keep the chain under control. BMW calls this part the slide rail for the twin chain. It keeps the timing chain tracking properly, and after years of running the rail surface wears down. Worn tensioners and guide rails are the likely cause when rattling comes from the timing case. The rail weighs 44 g and is made in Germany.

Original BMW Parts carry a 24-month parts warranty.

This number entered production in October 2004 and supersedes the earlier 11-31-7-830-867. BMW rates the change as exchangeable retrospectively, so the current rail is the correct replacement for engines built with the earlier number as well. One part covers every S54 application, including the M3 CSL and the M3 Convertible, with no coupe or roadster split on the Z cars.

Technical Details

• Manufacturer: BMW (Original BMW Part)
• Part number: 11-31-7-836-344
• BMW part name: slide rail, twin chain
• Engine: S54
• Weight: 44 g (1.55 oz)
• Production start: October 2004
• Supersedes 11-31-7-830-867, exchangeable retrospectively
• Sold individually, made in Germany
• Warranty: 24 months on Original BMW Parts

Common Questions

What causes rattling from the timing case on an S54?
Rattling there is most likely from worn tensioners and guide rails.

Does this replace 11-31-7-830-867?
Yes. BMW supersedes that number with this rail and marks it exchangeable retrospectively.

Does it fit the M3 CSL?
Yes. BMW applies the same rail to the E46 M3 CSL.

S54 timing work is familiar territory for the PMB parts team.

Fitment & Compatibility

Use the fitment table below to confirm year, make, model, submodel, and any notes tied to your exact vehicle. Pay close attention to engine, chassis, position, and option-specific details before ordering. PMB Performance can confirm this against your VIN, backed by more than 20 years of parts and fitment work.