Parts for your 2015 Mitsubishi Lancer-Ignition leads

2015 Mitsubishi Lancer ignition leads — what’s actually fitted

For the 2015 Mitsubishi Lancer (CJ series), ignition leads aren’t used. Mitsubishi moved these cars to a coil-on-plug (COP) direct ignition system across the 2.0L 4B11, 2.4L 4B12, and turbo variants (Ralliart/Evo X 4B11T). That means each spark plug has its own ignition coil sitting directly on top, doing away with traditional high-tension leads. This layout is documented in the Mitsubishi CJ Lancer Service Manual (Group 16: Engine Electrical – Ignition, 2014–2016 editions) and reflected in the MMC ASA electronic parts catalogue for 2015 VINs, which lists individual ignition coils and spark plugs, but no ignition wire set. Major ignition component catalogues (e.g., NGK and Denso application data for CJ Lancer) likewise specify coil-on-plug coils and plugs only.

Why the change? Coil-on-plug improves spark accuracy, reduces electrical losses and radio interference, and slims down the number of wear items under the bonnet. With no long high-tension leads, there’s nothing to arc to earth or degrade from heat in the same way old-style leads did.

What should owners service instead? Focus on spark plugs and the coils themselves. Replace plugs at the interval in the owner’s handbook—often around 90,000–100,000 km for long-life iridium—but adjust sooner if there’s rough running. During plug changes, check each coil’s rubber boot for cracks, hardening, or carbon tracking. If there’s oil in the plug tubes, the rocker cover gasket or tube seals likely need attention, oil contamination can damage coils over time.

Chasing a misfire on a COP Lancer typically involves scanning for codes (P0300–P0304 are common), inspecting plugs, and swap-testing coils between cylinders to see if the fault follows the coil. When refitting, use the correct plug gap and torque, keep the plug wells clean and dry, and apply a small smear of dielectric grease inside the coil boots if recommended by the service literature. Be wary of aftermarket listings that advertise “ignition leads” for a 2015 Lancer—those usually suit earlier 4G-series engines or different platforms. For the CJ Lancer, the right parts are individual ignition coils and the correct spark plugs.

• Service focus: spark plugs, individual coil boots, plug tube seals
• Typical symptoms: misfire under load, rough idle, MIL on (P0300–P0304)
• Tools: scan tool, torque wrench, plug socket with extension, compressed air

FAQs

Does a 2015 Mitsubishi Lancer have ignition leads?
No. The 2015 CJ Lancer uses a coil-on-plug direct ignition setup, so there are no traditional high-tension leads between a coil pack and the plugs. This configuration is detailed in the Mitsubishi CJ Service Manual (Engine Electrical – Ignition) and confirmed by the OEM parts catalogue, which lists four individual coils and no lead set.

What do I replace instead of ignition leads on a 2015 Lancer?
Replace the spark plugs at the scheduled interval and inspect each ignition coil and its rubber boot for wear, cracking, or carbon tracking. If you find oil in the plug wells, plan on a rocker cover gasket/tube seal repair. These checks cover the maintenance role that ignition leads used to play on older systems.

My parts search shows “ignition leads” for a 2015 Lancer—will they fit?
They won’t fit a CJ-series 2015 model. Those listings usually relate to earlier Mitsubishi engines that used a distributor or remote coil pack. For a 2015 CJ Lancer, you’ll be choosing individual ignition coils and the correct spark plug set instead.