Index 12 Fuel Injector

The Genuine BMW fuel injector, Index 12 (part number 13538616079), represents the latest revision for BMW's direct fuel injection systems found in turbocharged engines. This design is critical as direct injection operates at significantly higher pressures than conventional port injection, making the fuel system vital for engine performance. Symptoms like misfires or rough idle can indicate faulty fuel injectors. BMW has undergone several redesigns for this injector to enhance reliability, and it's imperative to ensure compatibility by checking the index number on existing injectors. Injectors with index 10 and lower have different calibrations and construction than those with index 11 or higher, and they cannot be mixed within the same cylinder bank. For optimal performance, especially on modified vehicles, replacing all fuel injectors simultaneously is highly recommended. Installation requires a calibration procedure where the injector's adjustment value must be recorded before installation and used during the calibration process. Each new injector comes with a protective cap to maintain cleanliness and keep the viton seal compressed. This cap should remain in place until just before installation, as the seal will expand, making installation difficult without specialized tools to compress it. This Index 12 injector is imprinted with "13537585261-12" on its body. This fuel injector is compatible with a wide range of BMW models, including the 1 Series M, 135i, 335i, 335i xDrive, 335is, 535i, 535xi, and X6 (specifically models like xDrive35i, xDrive50i, M, and ActiveHybrid from 2007 through 2014). It is essential to verify fitment for your specific vehicle year, engine, and drivetrain configuration.