BMW K Type Differential Bearing Replacement Kit (1999-2006): E46, E39, E38... Product Description: Upgrade and ensure the longevity of your BMW's differential with Racing Diffs' K Type Differential Bearing Replacement Kit. Specifically designed for BMW models produced from 1999 to 2006, this kit is tailored to meet the unique needs of the K differential type. This differential type is prominently found in notable BMW models such as the E46, E39, and E38, to name a few. For complete fitment list, scroll to the bottom of the page.  Key Features: Bearing Identification: Designed for 6-cylinder (188K) and 8-cylinder (215/220K) BMW models. OEM Quality Components: Trust in the durability and quality of Racing Diffs components, tailored for optimal fit and function. Guided Support: Our video gallery is brimming with installation tutorials, ensuring a hassle-free repair process. Comprehensive Repair Kit: From crush sleeve shims to flange oil seals, our kit ensures a complete and thorough repair. How to tell if your differential needs bearings replacement? Characteristic noise from differential/transmission occurs during acceleration and coast (engine breaking). To distinguish differential bearing noise from the wheel bearing noise steer left-right like you are warming up tires for the race. If the noise changes its intensity than it is a wheel bearing. If intensity of the noise remains the same, that means differential bearings needs to be replaced. Racing Diffs Components are OEM quality. Repair kit includes: -1x Crush sleeve shim-1x Small pinion bearing-1x Large pinion bearing-1x Input flange oil seal-2x Output flange oil seal K type differential type was found in following BMW models: - 3 series: E46- 5 series: E39- 7 series: E38 (late models), E65, E66, E67- X3 series: E83- X5 series: E53- Z series: E85, E86