Masata BMW N55 Lambda Spacer Fooler O2 Oxygen Sensor Boss Stainless Steel (M2, M135i, M235i, 335i & 435i)



The N55 spacer is designed to move the lambda sensor after the catalytic converter away from the flow of exhaust gases when a car has a sports cat or Decat to keep the engine light off.

It can also be used in some applications to move the lambda sensor away if it’s touching something and the space is there to fit and use this.


Height when fitted: 45mm

Total height without fitting: 50mm

Length: 45mm

M18 x 1.5mm thread.

We cannot guarantee this will work on every vehicle as each one can be completely different.


    Compatibility Check

    To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number(UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout. 



    BMW M135i 
    • 2012+ F20/F21 M135i/iX

    BMW M235i 
    • 2013+ F22 M235i
    • 2016+ F87 M2

    BMW 3 Series
    • 2012+ F30 335i/iX Sedan
    • 2012+ F31 335i/iX Touring
    • 2013+ F34 335i/iX Gran Turismo

    BMW 4 Series
    • 2014+ F32 435i/iX
    • 2014+ F33 435i/iX Conv.
    • 2014+ F36 435i/iX Gran Coupe


    Manufactured by



    Part Number


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