When trumpet horn performance matters, the BOSCH 0 986 AH0 742 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Voltage [V]: Zinc V, Bore Diameter [mm]: Carbon, Cast Iron mm, Operating Mode: PN, Power Consumption [W]: 60 W, Signal: Aluminium. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Compatible with BMW, PORSCHE 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: 004 542 34 20, 004 542 36 20, 005 542 02 20, 005 542 03 20 and 148 more. Matching these numbers confirms a like-for-like replacement with no loss of function. BOSCH 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 with tracked delivery and a 14-day money-back guarantee with hassle-free returns.

Robert Bosch GmbH, founded in 1886 in Stuttgart, Germany, is one of the world's largest automotive parts suppliers. Bosch specialises in braking systems, fuel injection, spark plugs, alternators, and electronic engine management. As an OE supplier to virtually every major car manufacturer, Bosch parts meet or exceed original equipment specifications. With over 130 years of engineering innovation, choosing Bosch means choosing proven reliability backed by extensive research and development.