Included in our Water Pump/Thermostat/Hose Package for N54 135i/335i/535i/Z4 35i is -
- Genuine BMW Water Pump (#11517632426)
- Replacement water pump screws (not re-usable) (#11517602123)
- OEM Wahler Thermostat (#11537549476)
- Genuine BMW connecting hose (#11537545665)
Replace your twin-turbo BMW's electric water pump BEFORE it experiences catastrophic failure!
BMW changed to an electric pump to reduce emissions and make the engine more efficient. Pumps driven from the main drive belt 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. Depending on operating conditions the engine may go into limp mode and require a tow! 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.Please note: This kit is NOT for the N55 "TwinPower" single turbo models, found from 2011 forward. If your car is a 2011 or newer model, please make sure it has the N54 engine, which is a tru twin turbo configuration. Models like the 1M Coupe, 335is and Z3 35is used the N54 engine after 2010, while models like the 335i and 335xi stopped using the N54 engine after the 2010 model year. Please be sure your car has an N54 before ordering.
This package is made up of all OE or OEM replacement water pump and thermostat parts for the 2007+ models with the N54 twin-turbo engine. This kit includes the water hose connecting the pump to the thermostat. It may be best to replace the hose to avoid leaks after the install. We favor OEM parts to cheaper alternatives because of better build quality and a two year warranty (most aftermarket brands only give one year).
Engine coolant may also be ordered using the options below.
E82 / E88 (08-10) > 135i3 Series
E90 / E91 / E92 / E93 (07-10) > 335i
E90 / E91 / E92 / E93 (11-13) > 335is
E90 / E91 / E92 / E93 (07-10) > 335xi5 Series
E60 / E61 (07-10) > 535i
E60 / E61 (07-10) > 535xi