Ignition Coil and Iridium Spark Plugs for Subaru Outback (2001-2009) 3.0L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2001-2009 Subaru Outback

What it Does: Replaces fatigued factory ignition coils and eroded spark plugs with high-dielectric coil packs and fine-wire iridium plugs to eliminate misfires and restore factory ignition timing under load.

The Stock Outback EZ30 Ignition Failure Points

The horizontally opposed layout of the 3.0L EZ30 engine positions ignition coils directly adjacent to exhaust runners and cylinder head heat zones. Over time, thermal cycling degrades the factory coil epoxy insulation and embrittles the rubber spark plug boots. This leads to secondary voltage leakage, carbon tracking, and intermittent misfires under load, while worn factory electrodes increase ignition burden on aging primary windings.

The Engineering Solution

This kit matches six high-output coil-on-plug units with six precision iridium spark plugs (ILFR6B specification). The ignition coils feature heat-resistant thermoplastic housings, copper secondary windings, and high-temp silicone boots designed to withstand prolonged engine bay heat soak. The laser-welded iridium electrode center minimizes required firing voltage, providing consistent flame propagation and complete fuel atomization across all six cylinders.

Technical Specifications

Compatibility

• 2001-2004 Subaru Outback (BH Chassis) 3.0L H6 (EZ30D)
• 2005-2009 Subaru Outback (BP Chassis) 3.0L H6 (EZ30R / 3.0 R / 3.0 R VDC)

The Subaru Boxer Standard

Engineered to meet the precise electronic demands of Subaru's naturally aspirated 6-cylinder Boxer platform, ensuring balanced cylinder-to-cylinder ignition, smooth power delivery, and reliable cold-weather starting without triggering check engine codes.