Carbon Fiber Coolant Cap BMW M5 F90

BMW M5 F90 Carbon Coolant Cap — the engine bay refined down to the last detail

This BMW M5 F90 carbon coolant cap enhances every detail of your 600-horsepower sedan's engine compartment. This replacement part replaces the original black plastic cap with a carbon cover in the M Performance spirit, accentuating the premium finish of the 4.4-liter TwinPower Turbo V8. On an F90, everything has been designed for performance: it would be a shame for opening the hood to still reveal a BMW coolant reservoir with an entry-level cap.

A sporty and distinctive design

The cover faithfully replicates the geometry of the original cap, replacing the black plastic with genuine woven carbon. The aligned 2x2 twill weave and high-density gloss varnish reveal the depth of the material. Even this small detail matters: your engine bay now boasts absolute racing visual consistency, down to the smallest component accessible when opening the hood.

This is precisely what owners who have already invested in BMW carbon parts inside and out are looking for. An engine bay treated with the same care as the bodywork makes all the difference at a car meet, when reselling, or simply when checking fluid levels on a Saturday morning. Carbon catches the light differently than plastic: depending on the angle, the weave appears, disappears, and deepens.

Superior material & manufacturing quality

This part is molded from high-quality woven carbon fiber, heat-treated to withstand the engine compartment temperatures and heat transfer from the cooling system for the long term. The high-density UV varnish protects against thermal fluctuations, hydrocarbons, and high-pressure washing. Each part is visually inspected before shipping. It is this combination of material and varnish that prevents the yellowing and white haze seen on entry-level carbon covers after a few summers.

• BMW M5 F90 carbon cover — replicates the geometry of the original cap
• Genuine carbon fiber — premium material, not a film or print
• Aligned 2x2 twill weave — the uniform weave sought after on premium parts
• High-density gloss varnish — deep black and UV resistance
• 5-minute installation — screws directly onto the original reservoir's threads
• Sealing maintained — the original gasket remains in place and continues to function

Compatibility and installation

This cover is designed exclusively for the BMW M5 F90 coolant reservoir. Installation is a direct replacement, screwing onto the original reservoir's threads. Allow approximately 5 minutes for installation, with no special tools required. The reservoir's seal is fully maintained by the original gasket. Always work with a cold engine: the cooling system is under pressure when hot, and this precaution remains the first rule for any work in the engine bay.

A carbon part in the engine bay—can it withstand the heat?

This is a legitimate question before investing in a carbon engine compartment cover. The answer lies in the process: a part molded from woven carbon fiber and heat-treated behaves very differently from a simple carbon-look adhesive film, which peels and fades at the first sign of rising temperatures. Here, the material is structural, and the varnish acts as a barrier against both UV rays and hydrocarbon splashes. A second often-overlooked point: the cover dresses the cap without modifying either the threads or the gasket, therefore having no impact on the operation of the cooling system.

Why order your BMW M5 F90 carbon cover from Becquet Voiture?

Becquet Voiture selects carbon parts whose weave, alignment, and varnish hold their own against original BMW carbon accessories. On a part of this size, everything comes down to the details: a misaligned weave or a matte varnish is instantly noticeable with an open hood. Fast delivery from Europe, French-speaking support, and an expert catalog dedicated to BMW M Performance enthusiasts.

Order your carbon cover today and give your M5 F90's engine bay the finish it deserves. Discover our BMW performance accessories and our bestsellers as well.

Type: Coolant cap
Compatible make / model: BMW M5 F90
Years: Depending on version
Material: Woven carbon fiber
Finish: High-density gloss varnish
Weave: Aligned 2x2 twill
Position: Engine compartment
Installation: Direct replacement, screws onto the original reservoir
Sealing: Ensured by the original gasket
Condition: New
Main function: Carbon finish for the engine bay