Subaru Ignition Coil 22433AA600 UF665 Replaces UF738

When Subaru vehicles show rough idle, sluggish acceleration, abnormally high fuel consumption, or engine fault light with misfire symptoms, it usually indicates aged ignition coils or internal insulation failure, preventing high-voltage spark. The ignition coil converts battery low voltage to the high voltage needed to spark each spark plug at the correct time to maintain smooth operation. This product fits many Subaru four-cylinder engines, OEM numbers including 22433AA600, 22433AA601, 22433AA602, and also compatible with UF738 and UF665 specs. Installation requires using a torque wrench to tighten bolts to standard torque; avoid over-tightening to prevent housing cracking; ensure the coil-to-spark plug connections are clean and dry to prevent secondary faults.