Thermostat Housing O-Ring (33x3.5), BMW - G42, G20, G22, G30, X3, X4, Z4, Supra (B46D)

This part is listed by BMW as BMW part number 11539468021 (11 53 9 468 021) and is described as the o-ring seal between the thermostat engine block on the B46D turbo 4-cylinder in 2020+ G42 230i, G20 330i, G22/G26 430i, G30 530i, G01 X3 30i, G02 X4 30i, G29 Z4 30i, and A90 Supra. This o-ring measures 33x3.5mm. There is a smaller o-ring in the same location, see Related Items below.

This is a Genuine BMW B46 coolant hose with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.