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BMW

Genuine BMW N55 Engine Coolant Pipe O-Ring/O Ring Gasket OEM Water Pipe Seal 11537584829 Fits 135i M135i, 235i M235i, 335i, 435i, 535i, 640i, 740i, X1 X3 X4 X5 X6 35i

Genuine BMW N55 Engine Coolant Pipe O-Ring/O Ring Gasket OEM Water Pipe Seal 11537584829 Fits 135i M135i, 235i M235i, 335i, 435i, 535i, 640i, 740i, X1 X3 X4 X5 X6 35i

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BMW N55 Cooling System Sealing Ring - Part No. 11537584829

Stop annoying coolant loss on your turbocharged six with this original BMW sealing ring for the N55 cooling line. This factory-spec seal is the direct replacement for the water tube connection on N55 engines and is a simple, low-cost fix for seepage at the coolant pipe joint. Perfect for routine cooling system refreshes, water pump or thermostat jobs, or when diagnosing a minor coolant smell or dampness around the front of the engine.

We have fitted this part on our own N55 builds and for many MJ Modifications customers with excellent results. Expect an exact fit, dependable sealing and long-term reliability you can trust on daily-driven cars and tuned applications alike.

Why this N55 sealing ring is the right choice

  • Original BMW component for the N55 platform for precise fitment and proper sealing
  • Targets leaks at the cooling pipe interface to help cure slow coolant loss
  • Engineered for heat and pressure in the N55 cooling circuit
  • Ideal to replace alongside water pump, thermostat, radiator hoses or coolant pipe work
  • Proven in-house with consistently positive feedback from owners

Part details

BMW part number: 11537584829

Engine: N55 3.0 turbo petrol

Item: Cooling pipe sealing ring - water tube O ring

Vehicle applications

Fits N55-powered models including the following BMW series and years:

  • 1 Series: E82 E88 135i 09/2009-10/2013. F20 M135i M135ix 04/2011-06/2016. F21 M135i M135ix 12/2011-06/2016.
  • 2 Series: F22 F23 M235i M235ix 10/2012-06/2016. F87 M2 11/2014-06/2018.
  • 3 Series: E90 E91 E92 E93 LCI 335i 11/2008-12/2013. F30 F31 335i 04/2011-06/2015. F34 GT 335i 07/2012-06/2016. Hybrid 3 where fitted with N55.
  • 4 Series: F32 F33 F36 435i 11/2012-06/2016.
  • 5 Series: F07 GT 535i 09/2008-02/2017. F10 F11 535i 01/2009-10/2016. Hybrid 5 where fitted with N55.
  • 6 Series: F06 Gran Coupe, F12 Convertible, F13 Coupe 640i 10/2009-10/2018.
  • 7 Series: F01 F02 LCI 740i 05/2011-05/2015. Hybrid 7 where fitted with N55.
  • X Models: E84 X1 35ix 04/2009-04/2015. F25 X3 35ix 07/2009-08/2017. F26 X4 35ix M40ix 06/2013-03/2018. E70 LCI X5 35ix 40ix 04/2009-06/2013. F15 X5 35i 08/2012-06/2018. E71 X6 35ix 40ix 07/2009-06/2014. F16 X6 35i 09/2013-05/2019.

Fitting service

Need installation? MJ Modifications in Warwickshire can fit this part and carry out a full N55 cooling system health check. Request a quote at info@mjmodifications.co.uk.

Compatibility check before dispatch

We can validate fitment before shipping. Add your UK registration or the last 7 of your VIN at checkout to ensure you receive the correct item for your N55.

Manufacturer and warranty

Manufacturer: BMW

Two-year manufacturer warranty for UK customers and one-year manufacturer warranty for international customers when a valid VIN is supplied and the vehicle is confirmed compatible.

Helpful search terms

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