E36/E46Seller listing
Listed priceSee seller for current price
View listing at Racingdiffs; opens in a new tabBMW E36/E46 · Buyer's guide
BMW E36/E46 Differential Identification & LSD Paths
BMW E36 and non-M E46; differential family, ratio, input/output flanges, driveshaft, axles and market specification must be identified
Current seller options
WHERE TO BUY
Open an exact listing, then confirm fitment, stock, price, and shipping with the seller before ordering.
Seller links checked . Prices and availability can change.
E36/E46Seller listing
Listed priceSee seller for current price
View listing at Racingdiffs; opens in a new tabE36/E46Seller listing
Listed priceSee seller for current price
View listing at Racingdiffs; opens in a new tabE36/E46Seller listing
Listed priceSee seller for current price
View listing at Streetdrivenindustries; opens in a new tabWhat you need to know
Do not buy by S tag or ratio alone. Confirm chassis/body, case family, market, ratio, input flange, output flanges/axles, rear cover/mounts, driveshaft and ABS/gearing effects. Open the unit or test breakaway/condition where practical; a worn clutch LSD, welded carrier or moved tag can defeat a visual shortcut. Ring-and-pinion setup requires backlash, preload and contact-pattern measurement.
OEM numbers
E36 factory tag convention: an S before the ratio identifies a factory limited-slip tag (for example S3.15 or S3.23), but tags can be missing or moved and condition must be verified. E36 six-cylinder race references use the 188 mm medium casefour-cylinder/compact and Euro M3 large-case applications are separate. Non-M E46 commonly uses the later 188K familyE36/E30/E34 ZF cores require a purpose-built conversion and professional setup rather than a direct swap.Supersession
Identification/upgrade page, not a supersession chain. E36 medium-case assemblies, E46 188K housings, donor ZF cores and complete aftermarket carriers are distinct paths.
Fitment
Do not buy by S tag or ratio alone. Confirm chassis/body, case family, market, ratio, input flange, output flanges/axles, rear cover/mounts, driveshaft and ABS/gearing effects. Open the unit or test breakaway/condition where practical; a worn clutch LSD, welded carrier or moved tag can defeat a visual shortcut. Ring-and-pinion setup requires backlash, preload and contact-pattern measurement.
Aftermarket options
Checked RacingDiffs E46 188K donor-core conversion kit and complete forged 188K carrier/assembled options. All checked variants were sold out. A donor ZF core should be inspected/refreshed; this page does not recommend welded street differentials or claim a universal E36-to-E46 bolt-in swap.
Before you buy
E36 identification and non-M E46 188K upgrade paths are separate sections, not direct interchanges. Read the case/tag and verify ratio, input/output flanges, mounting, axle compatibility and required setup before ordering. Documented scarcity exception: seller-path count is four, but availability is zero at the dated checks. Differential case family, ratio, input/output flange, ABS/speed-signal implications, and installed unit must be verified.
Research and fitment sources
Supersede reviewed 8 unique research sources for this guide. 4 also appear above as a seller or official action and are not repeated here; 4 additional citations follow.
Research last verified .