Ignition Coil and Iridium Spark Plugs for Mitsubishi Lancer (2009-2017) 2.4L

Direct-Replacement Ignition Kit for 2009-2017 Mitsubishi Lancer

What it Does: Restores factory ignition energy, stabilizes erratic idle, and eliminates high-load misfires across all four cylinders in the 2.4L 4B12 engine.

The Stock Lancer Dielectric Degradation and Gap Erosion

Over extended thermal cycling within the compact 4B12 cylinder head, factory ignition coil boots harden and develop micro-fractures, allowing high-voltage secondary current to arc to the cylinder head rather than across the spark plug gap. Concurrently, factory spark plugs suffer from electrode erosion and gap widening, placing increased electrical resistance on aging internal coil windings. This degradation leads to weak spark output, unburned fuel entering the exhaust tract, rough cold starts, and intermittent P0300–P0304 diagnostic trouble codes.

The Engineering Solution

This complete ignition kit features four heavy-duty ignition coils paired with fine-wire iridium spark plugs. The coils utilize high-grade internal copper windings and specialized epoxy potting to resist thermal breakdown and provide consistent kilovolt output under high load. The matched iridium plugs provide superior thermal conductivity and a minimal electrode surface area, lowering the required ionization voltage while offering extreme resistance to spark erosion and carbon fouling.

Technical Specifications

Compatibility

• 2009-2017 Mitsubishi Lancer GTS (2.4L L4 4B12)
• 2011-2017 Mitsubishi Lancer SE / SEL (2.4L L4 4B12)
• 2010-2011 Mitsubishi Lancer Sportback GTS (2.4L L4 4B12)

The Mitsubishi JDM Performance Standard

Engineered to withstand aggressive cam profiles and continuous MIVEC variable valve operation, this kit delivers sharp throttle response and complete fuel combustion across the entire rev band.