Original BMW Engine Cover Nut Cap, BMW 3 Series, 5 Series, M3, X5, Z3, and Z4 (1991–2008)

On the BMW models covered below, this Original BMW cap covers the nut that secures the engine cover to the valve cover. It keeps dust and other debris from working their way under the engine cover. BMW calls the part simply a cap, part number 11-12-1-726-089. Each one weighs 3 g. It is made in Germany. BMW's parts data shows this number in production since September 1989, which is why the same cap carries across several decades of M50, M52, M54, S50, and S52 engines.

Original BMW Parts carry a 24-month parts warranty.

This cap is easy to lose during an engine service. It is small and can easily go missing during an engine service. A missing cap leaves the cover nut exposed and gives dirt a path under the cover. The same cap is used on many chassis: E36 and E46 3 Series, E34 and E39 5 Series, E53 X5, the Z3, and the E85 Z4. Since one number covers all of them, you only need to know how many caps your engine cover uses.

Technical Details

• Manufacturer: BMW (Original BMW Part)
• Part number: 11-12-1-726-089
• BMW name: cap
• Function: covers the engine cover retaining nut on the valve cover
• Weight: 3 g (0.11 oz)
• Production start: September 1989
• Made in Germany
• Sold individually
• Warranty: 24 months

Common Questions

What does this cap actually cover?
It covers the nut that secures the engine cover to the valve cover.

Is it worth replacing a missing one?
Yes. Replacing it keeps the engine bay looking finished and stops dust and debris from working their way under the engine cover.

A few dollars in caps puts the finishing touch back on a freshly serviced engine bay.

Fitment & Compatibility

Compare your production year and trim against the table below. PMB Performance can confirm this against your VIN, backed by more than 20 years of parts and fitment work.