Haynes Manual - Manufacturers

Manufacturers

Haynes generally has the co-operation of the manufacturers to provide technical information such as mechanical tolerances and wiring diagrams. This may seem against their own interests since servicing can cost 40% of the cost of the vehicle over its lifetime, but manufacturers get loyalty by providing customers with information that lets them fix their vehicle, to their ability, or at least diagnose the fault before taking it to a garage. Over the lifetime of a vehicle, the aftermarket is worth perhaps as much as the new cost price of the vehicle, so the manufacturer still gets a significant revenue from the spare parts, and the longer a vehicle lasts, the more so.