Water Pump Neck (6.4mm), BMW - G2X, G30, G01, G02, G29, Supra, (B46D)

This part is listed by BMW as BMW part number 11518482253 (11 51 8 482 253) and is described as the radiator hose neck connector on the water pump of B46D engine used in 2020+ G42 230i, G20 330i, G22/G26 430i, G30 530i, G01 X3 30i, G02 X4 30i, G29 Z4 30i, and A90 Supra.

Size note: BMW lists two neck connectors (flange supports), based on the thickness of the casting of the water pump support. This is for the 6.4mm casting (the other is 7.5mm). BMW assumes you have everything apart to measure before ordering. There is a QR code label on the bottom edge of the water pump support. If "02" "03" or "04" is next to the QR code you likely have the 6.4mm flange (no guarantee this is a reliable indicator).

This is a Genuine BMW B46 water pump neck 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.