BMW OE number, as listed in aftermarket supplier catalogues. Compare listings for this exact number, then confirm the part number and vehicle fitment before ordering.
Supplier articles whose catalogue lists 21 21 1 223 637. Check the supplier’s own restrictions before ordering. A fitment condition under a part number is one its supplier names for at least one of the vehicles the part is listed for, not for all of them: a vehicle’s page shows which apply to it.
What these parts’ suppliers state
Each value belongs to the part number beside it, not to the OE number: parts that list one OE number can differ. Where your vehicle manufacturer gives a value, it takes precedence.
KE-BM18Diameter: 228 mmNumber of Teeth: 10Fitment conditions:Engine Code: M50 B20 (206S1), M50 B20 (206S2)Vehicle Equipment: for vehicles with air conditioning, for vehicles without air conditioningBlock SeparationConstruction Year to: 06.1992+1 moreShow fewer
RYMEC
JT6159Multi-piece: three-pieceNumber of Teeth: 10Hub Profile: 23x29Supplementary Article/Supplementary Info: with clutch pressure plateSupplementary Article/Supplementary Info: with synthetic greaseSupplementary Article/Supplementary Info 2: with clutch discSupplementary Article/Supplementary Info 2: with clutch release bearingClutch Pressure Plate Outer Diameter: 228 mmFriction Lining Outer Diameter 1: 228 mm+6 moreShow fewerFitment conditions:Vehicle Equipment: for vehicles without air conditioning
SACHS
1878 005 611Parameter: 228TBDiameter [mm]: 228Hub Profile: 23x29-10NNumber of Teeth: 10Warranty: 3 years warranty+2 moreShow fewerFitment conditions:Vehicle Equipment: for vehicles without air conditioningEngine Code: M50Construction Year to: 1990093000 304 001Diameter [mm]: 228Number of Teeth: 10Warranty: 3 years warrantyFitment conditions:Vehicle Equipment: for vehicles without air conditioningEngine Code: M50replaced by SACHS 3000 305 0013000 305 001Diameter [mm]: 228Number of Teeth: 10Warranty: 3 years warrantyFitment conditions:Vehicle Equipment: for vehicles without air conditioningEngine Code: M50Construction Year to: 199009
STELLOX
07-00032-SXDiameter: 228 mmParameter: 228TBHub Profile: 23x29-10NNumber of Teeth: 10+1 moreShow fewerFitment conditions:Vehicle Equipment: for vehicles without air conditioningConstruction Year to: 09.1990
Related OE numbers
Numbers listed on the same aftermarket parts as 21 21 1 223 637, most shared first. A shared part is not a fitment guarantee.
Engine code and production dates decide fitment. Model name and year alone don’t.
6 vehicles in 2 model series, inferred
Aftermarket parts that list 21 21 1 223 637 fit these vehicles according to their supplier catalogues. That does not prove 21 21 1 223 637 itself fits every one: check the engine code, production dates and the supplier’s restrictions on the model series’ vehicle pages.