When retaining strap starter battery motorcycle performance matters, the ELRING B40.900 delivers — built to the same dimensional and material standards as the original part it replaces. Compatible with BMW 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: 61 21 1 230 392, 61 21 1 243 562. Matching these numbers confirms a like-for-like replacement with no loss of function. ELRING 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.

Elring, founded in 1879 in Dettingen an der Erms, Germany, is a globally recognised specialist in engine sealing technology and gasket manufacturing. Elring specialises in cylinder head gaskets, valve cover gaskets, oil pan gaskets, exhaust manifold gaskets, and complete gasket sets. As an OE supplier to Mercedes-Benz, BMW, Volkswagen, and Audi, Elring gaskets deliver factory-precision sealing. With 140+ years of sealing innovation and state-of-the-art manufacturing, Elring is the professional's choice for leak-free engine assembly and repair.