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BMW used K type differentials as a next generation after Millimeter differentials, so they were used in models produced from 1999 to 2006. Unlike mm diffs which had shims for backlash adjustment, K differentials use C-clips. However, they still use roller bearings.
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
You can choose 2 different options according to your differential size. Simplified, 6 cylinder are 188K while 8 cylinder models have 215/220K differential size. But to be 100% sure which option to order, please check this video instruction how to check using your VIN. It will show you how to use BMWFans.info.
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.
RacingDiffs 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
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