The water pump used in the 2012-2017 F22 M235i, F30 335i, F32 435i, F10 535i, F13 640i, F15 X5 35i, F16 X6 35i, and 2016-2018 F87 M2 models is electric and plays a vital role in managing temperatures for multiple systems throughout the car. However, because it's electric, when it fails it does so completely and without warning. We strongly recommend replacing the water pump before 80,000 miles.
BMW changed to an electric pump to reduce emissions and make the engine more efficient. Pumps driven from the engine accessories used up fuel which made for more emissions. Electric pumps only work when they are needed and only require the alternator to supply power. Because the engine computer regulates engine temperatures, the water pump only needs to work when it has to (including after the car has been turned off). In theory this should make the pump last longer. But it's the electronics inside that fail and will force a replacement, often without warning. Although if you are religious about oil changes and checking/clearing fault codes you may get a soft (hidden) code for low water pump output ahead of time.
The three (3) mounting bolts for the pump are required
. In an effort to reduce weight BMW uses a very light weight bolt that can only be used once. You can order the bolts separately from the link below.
This is an OEM N55 electric water pump manufactured by Pierburg - the original supplier to BMW for this part, as well as many other engine and transmission mounts. As the OEM it meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM parts are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.
F22 / F23 (2014-2021) > M235i
F22 / F23 (2014-2021) > M235i xDrive
F22 / F23 (2014-2021) > M235i-Racing
F22 / F23 (2014-2021) > M240i-Racing
F87 (2016-2021) > M2 N55 (2016-2018)
F30 / F31 / F34 (2012-2019) > 335i
F30 / F31 / F34 (2012-2019) > 335i xDrive
F30 / F31 / F34 (2012-2019) > Hybrid 3
F32 / F33 / F36 (14-20) > 435i
F32 / F33 / F36 (14-20) > 435i xDrive
F15 X5 (2014-2018) > X5 sDrive35i
F15 X5 (2014-2018) > X5 xDrive35i
F16 X6 (2015-2019) > X6 sDrive35i
F16 X6 (2015-2019) > X6 xDrive35i