Jaguar Ford Shared Ignition Coil 2W4Z12029BC 4.0L/4.2L Engine

If your Jaguar or Ford 4.0L/4.2L engine experiences rough idle, weak acceleration, higher fuel consumption, or misfire with MIL indicating cylinder loss, the factory ignition coil may be aged or breached. This coil converts low voltage to high voltage to ignite the mixture in each cylinder, ensuring smooth operation and power output. Compatible with OEM numbers 2W4Z12029BC, XR827823, XW4U12A366BB, XW4X12029BA; fits Jaguar S-Type, XJ8 and Ford Mustang with 4.0L/4.2L V8 engines. Installation must use factory-spec fasteners; ensure coil contact surface with spark plug is clean and free of oil to prevent high-voltage leakage.