Original BMW Valve Cover Self-Locking Hex Bolt M7x46, BMW 128i, 328i, 528i, X3, X5, and Z4 (2006–2013)

For the N51 and N52 six-cylinder BMWs, Original BMW part 11-12-7-558-453 is the M7x46 self-locking hex bolt that holds down the valve cover on models from the 128i and 328i to the X5 and Z4. BMW names it Hex bolt and gives a weight of 16 g (0.56 oz), and the bolt has been in production since June 2006. It is made in Germany and sold by the piece. A self-locking bolt carries a thread feature that resists backing out, which matters on a cover that sees constant heat cycles and engine vibration.

Original BMW Parts carry a 24-month parts warranty.

BMW's parts data shows this bolt across a wide spread of chassis that share the N51, N52, and N52N engines. Those include the E82 and E88 1 Series, the E90, E91, E92, and E93 3 Series, the E60 and E61 facelift 5 Series, the E83 facelift X3, the E70 X5, and the E85, E86, and E89 Z4. The same number also appears on six-cylinder versions of the 6 Series, 7 Series, X1, and later X3 sold in other markets. No supersession appears against it.

Technical Details

• Manufacturer: BMW (genuine part)
• Part number: 11-12-7-558-453
• BMW part name: Hex bolt (self-locking)
• Thread and length: M7x46
• Weight: 16 g (0.56 oz)
• Production start: June 2006
• Country of manufacture: Germany
• Sold individually
• Warranty: 24-month Original BMW parts warranty

Common Questions

Which engines use this bolt?
BMW ties it to the N51, N52, and N52N six-cylinder engines across the models above.

What size is the bolt?
It is an M7x46 self-locking hex bolt weighing 16 g.

Is it sold as a set?
No. The bolt is sold individually, so order the count your job needs.

PMB ships Original BMW fasteners for N52 owners who want factory hardware back on the engine.

Fitment & Compatibility

Use the fitment table below to confirm the exact year, make, model, submodel, and any application notes before ordering. PMB Performance can confirm this against your VIN, backed by more than 20 years of parts and fitment work.