Mazda 3 Ignition Coil ZJ0118100A / ZJ01-18-100 Direct Replacement

For 2006–2012 Mazda3 (1.6L 4-cylinder) and also compatible with Mazda2, Mazda6 and Ford Focus on the same platform. Ignition coil converts low voltage to high voltage to ensure precise spark plug ignition, improving combustion efficiency and power. OEM ZJ0118100A (ZJ01-18-100 and 0986221091); cross-reference with OEM system. Replacement difficulty relatively low; use a 10mm socket to remove mounting bolts; pay attention to plug orientation to avoid wiring obstruction.