When seal ring valve stem performance matters, the CORTECO 12015512 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Fitting Position: ES, Fitting Position: AS, Height 1 [mm]: Stainless Steel, Rubber mm, Material: 30, Outer Diameter 1 [mm]: Zinc mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Compatible with ALFA ROMEO, BMW, CITROËN, FIAT and 13 other makes 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: 01-28352-09, 03349, 04179944, 05626 and 67 more. Matching these numbers confirms a like-for-like replacement with no loss of function. CORTECO is a recognised supplier of automotive replacement 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.

Corteco, part of the Freudenberg Group founded in 1849 in Weinheim, Germany, is a specialist manufacturer of sealing and vibration control components. Corteco specialises in oil seals, gaskets, engine mounts, transmission mounts, and shaft seals for all vehicle systems. As an OE supplier through Freudenberg's partnerships with major car manufacturers, Corteco components maintain the same quality standards as original parts. With Freudenberg's 170+ years of materials science expertise, Corteco delivers precision-engineered sealing and damping solutions trusted in millions of vehicles worldwide.