Original BMW Convertible Top Roof Rail Mounting Kit for BMW 3 Series, 4 Series, M3, and M4 Convertible (2007–2020)

The Original BMW roof rail mounting kit, part number 54-37-7-187-747, is a plastic retaining piece that helps secure the top rails of the convertible roof on the E93 3 Series Convertible and the F33 4 Series and F83 M4 Convertible. BMW names it Mounting kit, roof rail, even though it comes as a single piece rather than a bag of hardware. Each piece weighs only 5 grams. BMW started production of this number in November 2006, and the same part carries across all three convertible chassis without a change in number. It is made in Germany.

Original BMW Parts carry a 24-month parts warranty.

With age, the plastic tabs on these pieces turn brittle and lose the strength they need to hold down their hinges, which is the usual reason owners come looking for a new one. Because BMW uses this piece only on convertible bodies, it has no place on a sedan, coupe, or Gran Coupe, even when the engine and year match. Owners of both an E93 and an F33 can stock one number for both cars.

Technical Details

• Manufacturer: BMW (genuine part)
• Part number: 54-37-7-187-747
• BMW name: Mounting kit, roof rail
• Weight: 5 g (0.18 oz)
• Production start: November 2006
• Made in Germany
• Sold as a single piece
• Warranty: 24 months on Original BMW Parts

Common Questions

Will this fit my 335i coupe or sedan?
No. BMW applies this piece only to the E93, F33, and F83 convertible bodies.

Why do these pieces need replacing?
The plastic tabs age and become brittle, and then they can no longer hold down their hinges with the strength they had when new.

Is it a kit with several parts?
BMW calls it a mounting kit, but it is sold as one 5-gram piece.

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.