Subaru Ignition Coil 22433AA421/22433AA560/22433AA561, FK0140 Specification Direct Installation

When your Subaru vehicle experiences idle jitter, weak acceleration, noticeably higher fuel consumption, or the engine fault light (P0300-P0304) is on, it typically indicates ignition coil aging or internal breakdown, failing to provide sufficient high voltage to spark plugs. The ignition coil raises 12V to tens of thousands of volts to ignite the air-fuel mixture, ensuring smooth engine operation and stable power. This product fits multiple 4-cylinder Subaru models such as Forester, Outback, Liberty; OEM numbers 22433AA421/22433AA560/22433AA561, also compatible with FK0140 specification for direct replacement. Installation: must be done with engine cold; disconnect the battery negative; ensure insulation sleeve on each coil is intact; tighten bolts with a torque wrench to the standard torque to avoid loosening and secondary faults.