64 21 8 391 003 : Engine/auxiliary pump water hose for BMW Series 5 E39 M52 until 09/98

This water hose provides the connection between the engine and the auxiliary water pump on the BMW Series 5 E39 equipped with the M52 engine, in the 520i, 523i and 528i versions in Saloon or Touring bodywork, produced until September 1998. As part of the restoration or maintenance of a classic vehicle, replacing this hose helps maintain the seal and proper operation of the cooling circuit. A faulty hose can lead to coolant leaks and compromise engine reliability. As a new original part, it is an essential element for preserving the mechanical integrity of your BMW E39.