When master brake cylinder performance matters, the ATE 03.2123-0271.3 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Diameter [mm]: 23, Carbon mm, Thread Size: M10x1, Supplementary Article/Supplementary Info: Zinc, Number of connectors: Aluminium, Length 1 [mm]: Composite, Rubber mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Compatible with VW vehicles; use the vehicle selector above to confirm exact fitment for your make, model, and engine variant. Fitment data is sourced from TecDoc, the authoritative European parts catalogue. This part supersedes original equipment references: 0 204 123 029, 05-0203, 0 986 480 449, 0 986 481 160 and 25 more. Matching these numbers confirms a like-for-like replacement with no loss of function. ATE is a recognised supplier of automotive braking components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.

ATE (Alfred Teves), founded in 1906 in Frankfurt, Germany, is one of the most respected names in braking technology, now part of the Continental Corporation. ATE specialises in brake pads, brake discs, brake calipers, brake fluid, and hydraulic components. As the original equipment supplier to Volkswagen, Audi, BMW, Mercedes-Benz, and Porsche, ATE sets the standard for braking safety. With over a century of braking innovation, ATE parts provide the confidence of OE-quality stopping power in every driving situation.