Racingline Billet MQB Brake Fluid Reservoir Cap – VWR19G707
The Racingline Billet MQB Brake Fluid Reservoir Cap is a precision-machined upgrade that replaces the standard plastic cap found on MQB platform vehicles. It delivers a noticeable visual lift under the bonnet while also offering a genuine functional improvement to how your braking system manages pressure.
Better Pressure Equalisation for Consistent Braking
The brake fluid reservoir cap plays a more important role than most drivers realise. As brake pads wear, particularly under hard track use, the fluid level drops and the air space above it expands. If the cap cannot equalise pressure properly, a slight vacuum can form in the master cylinder, which may affect pedal feel and braking response.
Racingline have engineered this billet cap with an improved venting design that maintains a balanced pressure inside the reservoir at all times. The result is a master cylinder that operates exactly as intended, whether you are on a spirited road drive or pushing hard on a track day with an upgraded big brake kit.
Built From Aerospace-Grade Aluminium
Each cap is CNC-machined using 5-axis equipment from a solid billet of 6061 aerospace-quality aluminium. It is then hand-polished and finished in a gloss-anodised Midnight Black coating, which resists corrosion and keeps its appearance over the long term. The Racingline logo is laser-etched into the surface for a clean, factory-grade finish.
Unlike cheap slip-on covers that simply hide the original cap, this is a full direct replacement for the OEM plastic part. It threads in place of the standard cap and feels reassuringly solid in the hand.
Key Features
- Improved pressure equalisation for more consistent braking performance
- CNC-machined from solid 6061 aerospace-grade billet aluminium
- Gloss-anodised Midnight Black finish with laser-etched Racingline logo
- Full direct replacement for the factory plastic cap, not a cosmetic cover
- Premium weight and finish that lifts the appearance of any engine bay
Important Fitment Note
If your standard brake fluid cap has a fluid level sensor attachment, this cap is not compatible with your vehicle. Please check your existing cap before purchase.
This upgrade fits a wide range of MQB platform vehicles from the Volkswagen Group, including popular VW, Audi, SEAT, CUPRA and Skoda models. To confirm compatibility with your specific car, please use the vehicle lookup tool or check the Vehicle Fitment tab for full details.
As an authorised UK dealer for Racingline Performance, Progressive Parts supplies the full Racingline range with complete confidence in product authenticity and quality. Racingline develop their products in the toughest environment of all, motorsport, then refine them for reliable performance on the road.
Applications
Please note, customers are wholly responsible for checking fitment for their vehicle.



