BMW 728i Ignition Coil 12131703227 Direct Installation OEM Replacement

BMW 728i dedicated ignition coil, OEM 12131703227, using factory-replacement design. Mounted above the engine cylinder head, directly connected to the spark plug, converting low voltage to high voltage to ignite the mixture; core to proper engine operation. If rough idle, weak acceleration, higher fuel consumption, or check engine light is on, ignition coil aging is likely. Part can be installed directly, no modification required; recommended work time 1–1.5 hours; when removing, avoid damaging the high-voltage harness.