In this video I show you how to replace injector nylon seals on BMW VW AUDI direct injection engines without using special tools. I was getting code P0171 System Too Lean Bank 1 cylinders 1,2,3 (Mixture Control) on my 2010 BMW 335i. Performed bunch of air leak tests before concluding that the seals are leaking. If you get P0171 it is bank 1 cylinders 1,2,3 and P0174 is bank 2 cylinders 4,5,6.

BMW
335i
135i
535i
E90
E92
E93
N54

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