Rein OE Quality Haldex system filter and fluid kits are a direct OE replacements for the original parts and fluid. Our kits come complete with an oil filter, fluid, seal and cap. A clogged system filter may place additional strain on the motor potentially resulting in premature burn-out. Therefore, replacing the coupling oil and filter, as often as the driving conditions call for, will ensure maximum feeder pump and Haldex clutch pack life.