Original BMW M8 x 55 mm Hex Bolt for BMW 3 Series, 5 Series, 7 Series, 8 Series, and Z3 (1984–2000)

The Original BMW hex bolt 07-11-9-902-957 is an M8 x 55 mm, property class 8.8 fastener that BMW uses across 1980s and 1990s 3 Series, 5 Series, 7 Series, 8 Series, and Z3 models. BMW supplies it with a chrome-free finish, so the coating contains no hexavalent chromium (Cr VI). Each bolt weighs 24 g. The head takes a 13 mm wrench or socket. This number entered production in August 2007, and it is the current BMW version for older cars that were built with an earlier bolt.

Original BMW Parts carry a 24-month parts warranty.

A hex bolt clamps two parts together, and its property class tells you the strength grade. Class 8.8 is the common medium-strength rating for metric hardware. BMW marks this bolt as exchangeable retrospectively with the older part number 07-11-9-900-575, so it can go in wherever that earlier bolt was used. It also cross-references to 07-11-9-905-874 and 07-11-9-912-524, which helps when an older parts diagram or a bolt you removed shows one of those numbers. Each bolt is sold individually, so order the quantity your repair needs.

Technical Details

• Manufacturer: BMW (Original BMW Part)
• Part number: 07-11-9-902-957
• BMW part name: Hex bolt
• Thread and length: M8 x 55 mm
• Property class: 8.8
• Head size: 13 mm hex
• Finish: chrome-free, no hexavalent chromium
• Weight: 24 g (0.85 oz)
• Production start: August 2007
• Replaces 07-11-9-900-575 (exchangeable retrospectively)
• Sold individually, priced per bolt
• Warranty: 24 months

Common Questions

Does this bolt replace 07-11-9-900-575?
Yes. BMW rates the change as exchangeable retrospectively, so this newer bolt fits wherever the older number was used.

What size socket does it take?
The head is a 13 mm hex.

How many bolts come in one order?
Each bolt is sold on its own, so order the quantity your repair needs.

Fitment & Compatibility

Use the fitment table below to confirm the exact year, make, model, submodel, and any application notes before ordering. Send your VIN and PMB Performance will confirm the fit, drawing on more than 20 years in the trade.