ZERONINE Design Brake Fluid Cap – Ford Fiesta ST MK8/Puma ST/Focus RS Mk3

ZERONINE Design Brake Fluid Cap – Ford Fiesta ST MK8 / Puma ST / Focus RS Mk3

The ZERONINE Design Brake Fluid Cap is a direct replacement for the standard plastic brake fluid reservoir cap on a range of fast Ford models. It gives a neater under-bonnet look, with stronger materials and a more positive feel when you remove and refit it.

What This Brake Fluid Cap Does

This cap replaces the original plastic brake fluid cap with a precision-machined aluminium version. It screws straight onto the factory brake fluid reservoir, using a new internal seal to keep the system closed and leak-free.

Because it is made from billet aluminium, it is more resistant to heat and ageing than the stock plastic part. This helps keep the seal consistent over time and reduces the chances of the cap becoming brittle or marked.

Key Features

• Direct OEM-style replacement for the factory brake fluid reservoir cap
• Machined from aerospace-grade 6082-T6 billet aluminium for light weight and strength
• Hard anodised gloss black finish with etched ZERONINE detailing
• Knurled grip for easy removal and refitting by hand
• Supplied with a new internal seal for a secure, leak-free fit
• Compatible with the optional ZERONINE acetal key tool (sold separately) for easier access in tight bays

Why It Matters

The brake fluid reservoir sits in a hot, busy area of the engine bay. The original plastic cap can look tired over time and may not handle heat as well as metal. This ZERONINE Design cap:

Improves durability by using a tougher material that is less affected by heat and ageing. The new seal helps maintain a proper closure, which is important for keeping moisture and dirt away from your brake fluid.

Improves appearance by matching other ZERONINE under-bonnet parts. The gloss black anodised finish and etched logo give a clean, factory-plus look. The knurled outer edge is not just for style – it also makes the cap easier to grip, especially if your hands are cold or oily.

Important: This part does not increase brake performance on its own. Its main benefits are better durability and a higher quality look and feel in your engine bay.

Technical Details

The ZERONINE Design Brake Fluid Cap is CNC-machined (computer-controlled cutting for precise shaping) from 6082-T6 billet aluminium. The hard anodised coating protects the metal from corrosion and wear while giving a consistent black finish.

Vehicle Fitment

This brake fluid cap fits popular modern Ford performance models, including:

• Ford Fiesta ST Mk8 and Mk8.5
• Ford Puma ST 1.5
• Ford Focus RS Mk3

It is designed as a direct replacement for the original brake fluid reservoir cap on these vehicles. To be sure it fits your specific car, please use our vehicle lookup tool on the Progressive Parts website or check the “Vehicle Fitment” tab on this product page before ordering.

The ZERONINE Design Brake Fluid Cap is a neat choice if you want a cleaner, more purposeful engine bay, with better long-term durability than the stock plastic cap.