Aren't the windshield washer fluid bottle and related parts shared between the 135i and 128i?
A few other things to note: N55 has Valvetronic, N54 does not. N54 uses problematic piezo injectors (which have been revised more than 10 times) and the N55 uses lower cost solenoid injectors.
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2012 BMW 135i Space Grey Metallic M-Sport DCT Dinan S2
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