BMW Genuine Fuel Injection Injector With Seal Ring - Index 11 Or Higher 535i 535xi 535xi X5 M X5 50iX X6 35iX X6 50iX X6 M Hybrid X6 135i M Coup&eacute; 135i Z4 35i Z4 35is 335i 335xi 335i 335xi 335i 335xi 335is 335i 335is 740i 750i 750iX ALPINA B7 ALPINA B7X 740Li 750Li 750LiX 760Li ALPINA B7L ALPINA B7LX 760Li ALPINA B7L ALPINA B7 BMW Genuine Fuel Injection Injector With Seal Ring - Index 11 Or Higher Also use: 1 x 13 53 7 564 751 fuel injector decoupler. IMPORTANT: Injectors with index 10 and lower have a different calibration & construction than injectors with index 11 and higher. Due to this difference. the injectors with index 10 & lower & injectors with index 11 & higher cannot be mixed in the same engine bank (i.e. cylinders 1-3 or 4-6). The index number can be found on the head of the injector after the BMW part number. Example: 13 53 8 616 079-11 (11) is the index number. This part is used in High-pressure rail/injector/line -- Manufacturer Warranty: 24000 miles or 2 years Please see Product Description below for vehicle compatibility