Parts for your 2015 Mitsubishi Lancer-Ignition coils

2015 Mitsubishi Lancer Ignition Coils — What They Do and How to Look After Them

Based on Mitsubishi Motors’ CF Lancer workshop manual, the Mitsubishi ASA parts catalogue, and application guides from OE suppliers like Denso and NGK, the 2015 Mitsubishi Lancer petrol models (2.0L 4B11, 2.4L 4B12, and the 4B11T in performance variants) use individual coil-on-plug ignition coils. These sit directly atop each spark plug. Only diesel variants (where fitted in some markets) don’t use ignition coils, as compression ignition engines rely on glow plugs instead.

For petrol 2015 Lancers, the ignition coils are the heart of the spark system. Each coil transforms the 12-volt supply into the high voltage needed to fire its spark plug precisely when the ECU commands it. Coil-on-plug keeps the spark strong and consistent, improves cold starts, trims emissions, and helps the Lancer run smoothly whether it’s the daily commute or a weekend squirt.

Ignition coils aren’t typically a scheduled replacement item on the Lancer, they’re replaced when symptoms appear. Common signs a coil is on the way out include a rough idle, hesitation under load, poorer fuel economy, a flashing or steady check engine light, and misfire codes (often P0300–P0304). Because coils fail intermittently before they die completely, a scan and a simple “swap test” (moving a suspect coil to another cylinder and seeing if the fault follows) is a practical workshop step.

Good servicing habits will keep the 2015 Mitsubishi Lancer ignition coils happy:

• Replace spark plugs at the recommended interval and use the correct spec, tired plugs overwork coils.
• Inspect coil boots for cracks, tracking, or oil. Oil in the plug wells points to a cam cover gasket leak that should be fixed promptly.
• Keep moisture out of the plug tubes and apply a small amount of dielectric grease to the inside of the boot during refit.
• When removing coils, unplug the connector carefully and avoid pulling on the wiring. Refit the coil retaining bolts snugly to factory spec.

Whether it’s a stock 2.0/2.4 or a hotter turbo model, sticking with quality OE-style coils (commonly Denso or NGK for this platform) is the go. If one coil fails on a high‑kilometre car, replacing the remaining set can be sensible insurance, but on lower‑km cars it’s fine to change only the faulty unit after confirming the diagnosis.

FAQs

Does a 2015 Mitsubishi Lancer have ignition coils?
Yes—if it’s a petrol model. The 2.0L, 2.4L and turbo variants all use individual coil-on-plug ignition coils. Diesel Lancers (where sold) don’t use ignition coils, they use glow plugs and compression ignition.

How often should ignition coils be replaced on a 2015 Lancer?
There’s no set interval. Coils are replaced when they fail testing or show symptoms such as misfires or rough running. Check them whenever you replace spark plugs, and address any oil or moisture in the plug wells to prevent premature coil damage.

Should all four coils be replaced at once?
Not always. If the car has modest kilometres and testing isolates a single faulty coil, replacing just that unit is fine. On higher‑km cars, or where multiple coils are weak, fitting a matched set can save repeat labour and keep performance consistent.