BMW Ignition Coil 11787558055/58073/45074/45075 Set of 4 Original Quality

If your BMW shows obvious idle jitter, weak acceleration, or MIL with misfire codes P0301-P0306, ignition coil aging or breakdown suspected; coil converts low to high voltage to ignite mixture. Compatible OEM numbers: 11787558055, 11787558073, 11787545074, 11787545075; for E82, E88, E89, E90, E92, Z4 and 135i, 335i. Disconnect battery negative, replace coils one by one, avoid mixing old with new; simultaneously replace spark plugs and ensure coil connectors are fully seated to prevent misfires.