Original BMW Valve Cover Bolt M6x36.5 for N55 and S55 Engines, 1 Series through 7 Series, M2, M3, M4, and X Models (2010–2021)

Part 11-12-7-584-156 is the Original BMW M6x36.5 bolt that holds the valve cover to the cylinder head on N55 and S55 six-cylinder BMWs, from the 135i and 335i through the M2, M3, M4, and the 35i X models. BMW calls it an ASA-bolt, and each one weighs 26 grams. BMW began production of this number in September 2009. It is made in Germany and sold individually, so you can order the exact count your job needs. Valve cover bolts clamp the cover down on its gasket so the joint around the cylinder head stays oil-tight.

Original BMW Parts carry a 24-month parts warranty.

The M6x36.5 size code reads as a 6 mm thread with a 36.5 mm length, which is how this bolt is told apart from other valve cover hardware. BMW carries the same bolt over from the N55 in the standard cars to the S55 in the F80 M3, the F82 and F83 M4, and the M2 Competition, so the part does not change between those engines. BMW's parts data runs it from the E82 1 Series and E90-family facelift 3 Series through the F-chassis generation that followed, including the F07 5 Series GT, F06, F12, and F13 6 Series, the F01 and F02 facelift 7 Series, and the E70, F15, E71, and F16 X5 and X6.

Technical Details

• Manufacturer: BMW
• Part number: 11-12-7-584-156
• BMW name: ASA-bolt
• Size: M6x36.5
• Weight: 26 g (0.92 oz)
• Production start: September 2009
• Application: valve cover to cylinder head
• Made in Germany
• Priced and sold individually
• Warranty: 24-month parts warranty

Common Questions

Does the M3 or M4 use a different valve cover bolt?
No. BMW uses this same bolt on the S55 in the M2 Competition, M3, and M4 as on the N55.

When are these bolts usually replaced?
They are often replaced during a valve cover gasket job.

Is this a full set of valve cover bolts?
No. Each bolt is priced and sold individually.

Fitment & Compatibility

Use the table below to verify the year and submodel for your build. PMB Performance can confirm this against your VIN, backed by more than 20 years of parts and fitment work.