Genuine BMW N55 Engine Coolant Thermostat - Part Number 11537601158
Restore precise temperature control on your BMW N55 engine with the Genuine BMW Engine Coolant Thermostat. This OEM BMW thermostat 11537601158 is the direct fit replacement for N55-powered models including 135i and 335i, plus X1 35iX, X5 35iX and 40iX, and X6 35iX and 40iX. Perfect for E82, E88, E90, E91, E92, E93, E84, E70 and E71 chassis. If you are seeing slow warm up, overheating, fluctuating coolant temperature or thermostat fault codes, this genuine part is the reliable fix.
Choose genuine BMW over aftermarket for your N55 thermostat to get exact calibration, correct fitment and long term reliability. We supply and fit this part regularly and customer feedback has been consistently excellent. Ideal for routine maintenance, preventative care and performance-focused builds where stable coolant temps matter.
Why this Genuine BMW N55 thermostat
- OEM BMW thermostat for N55 engines - engineered for accurate temperature regulation
- Direct replacement for a worn or failed thermostat - no modifications required
- Restores fast warm up and stable coolant temperatures under road and spirited driving
- Prevents common N55 thermostat issues - fluctuating temps and overheating
- Trusted fitment and performance - supplied and fitted by us with excellent customer feedback
- Genuine BMW quality for durability and peace of mind
- Part number: 11537601158
Compatible BMW models - N55 applications
This Genuine BMW thermostat fits the following BMW N55 models and E chassis:
1 Series
- 1' E88 09/2009 to 10/2013
- 135i
- 1' E82 09/2009 to 10/2013
- 135i
3 Series
- 3' E90 LCI 09/2009 to 12/2011
- 335i and 335xi
- 3' E91 LCI 09/2009 to 05/2012
- 335i and 335xi
- 3' E92 LCI 11/2008 to 06/2013
- 335i
- 3' E93 LCI 11/2008 to 10/2013
- 335i
X Series
- X1 E84 04/2009 to 04/2015
- X1 35iX
- X5 E70 LCI 04/2009 to 06/2013
- X5 35iX and X5 40iX
- X6 E71 07/2009 to 06/2014
- X6 35iX and X6 40iX
Common symptoms that point to a failing thermostat
- Slow engine warm up or never reaching normal temperature
- Overheating or temperature fluctuations under load
- Thermostat related fault codes on diagnostics
- Poor heater performance due to incorrect coolant temperature
Compatibility check before dispatch
We verify fitment before shipping to make sure you receive the correct Genuine BMW thermostat for your N55. Enter your UK registration or the last 7 of your VIN at checkout and we will confirm part 11537601158 suits your vehicle.
Installation and professional fitting
Professional fitting is recommended. Nforcd offers supply and fitting in Warwickshire. For a quote or to book, email Sales@nforcd.com.
Manufacturer
BMW
Warranty
Two years manufacturer warranty for UK customers and one year manufacturer warranty for international customers when VIN is provided at checkout on compatible vehicles.
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