We have noted more M54 engine failures due to overheating than on any of BMW's previous engines. We believe this is due to a combination of factors including the electronic thermostat and high operating temperatures. Our M54 Competition Thermostat Plate Kit is designed to return the selection of normal engine operating temperature to the owner/builder and improve engine longevity by replacing the failure prone electronically-controlled thermostat with a mechanical unit. [See Full Description Below]

A direct aluminum replacement radiator for the BMW E53 X5; 2000-06 4.4i, 2002-03 4.6is, or 2004-06 4.8is

Radiators and shroud kits are built to order. Lead-time varies.