Fuel Injector Seals For BMW N54 N63 135 335 535 550 650i 740i 750i X5 X6
• N63 (550i, 750i, 750Li, X5). • N54 (135i, 135iS, 1M, 335i, 335is, 335xi, 535i, 535xi, X6, Z4). Almost problems of the injectors are due to the leak of the seals. So you only need replace the seals will solve the problem.