17 11 1 436 381 : Expansion tank for BMW Series 5 E39 from 09/98

This expansion tank is intended as a replacement for a worn or faulty component on the BMW Series 5 E39, in saloon and Touring versions, equipped with M52 or M54 engines from September 1998. It covers the variants 520i (M52 and M54), 523i (M52), 525i (M54), 528i (M52) and 530i (M54). As part of the restoration or maintenance of a classic vehicle, the expansion tank plays an essential role in regulating the cooling circuit by absorbing volume variations of the coolant. Its replacement with a new part guarantees the integrity of the cooling system and helps preserve the reliability of the engine over the long term.