Aux Water Pump for Turbochargers, BMW - B46, B58, S58

This part is listed by BMW as BMW part number 11518651287 (11 51 8 651 287) and is described as the small auxiliary water pump used to cool the turbocharger(s) on the B46, B58, and S58 engines. This pump is used on G42, G87, G20, G80, G22, G82, G30, F90 M5, F48 X1, G01 X3, F97 X3M, G02 X4, F98 X4M, G05 X5 40i, G06 X6 40i, and Z4 30i/M40i.

This temp sensor is used to send coolant temp data back to the engine computer. The ECU uses this data to set cooling system performance, as well as fuel and ignition mapping. A bad sensor will send incorrect data back to the ECU and will result in poor engine performance and worse fuel economy. There should also be a corresponding fault code and check engine light or you might notice erratic gauge readings.

This is a Genuine BMW temp sensor 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.