Parts for your 2020 Mitsubishi Eclipse cross-Ignition coils

2020 Mitsubishi Eclipse Cross ignition coils

Ignition coils are relevant to most 2020 Mitsubishi Eclipse Cross models. Technical sources including the Mitsubishi Motors Service Manual for Eclipse Cross (2018–2020, Engine Electrical/ Ignition), the Mitsubishi ASA parts catalogue, and AU/NZ application guides from NGK/NTK show the 1.5L MIVEC Turbo petrol (engine code 4B40) uses a coil-on-plug system with one ignition coil per cylinder. Note that some markets also offered a 2.2L DI‑D diesel, that engine is compression ignition and uses glow plugs rather than ignition coils, so coils do not apply to the diesel variant.

For petrol 2020 Eclipse Cross models, the ignition coils are the spark-makers’ best mates. Each coil sits directly on top of a spark plug, transforming the 12‑volt supply into the tens of thousands of volts needed to fire the plug and light off the air–fuel mix. Coil-on-plug improves spark accuracy, reduces high‑tension leads, and helps deliver smoother starts, better fuel economy and lower emissions, which is why Mitsubishi specifies it for the 4B40 in the factory manual and parts listings.

There’s no set replacement interval for coils on this model, they’re a “replace-on-condition” item. During regular servicing, a good workshop will scan for misfire codes (like P0301–P0304), check for rough idle or stumble under load, and inspect the coil boots and plug wells for moisture or oil. Keeping the correct spec iridium spark plugs fresh at their recommended interval helps coils live longer, as weak or worn plugs make coils work harder and run hotter.

Typical signs a coil is on the way out include:

• Rough idle or hesitation, especially under load
• Check Engine light with cylinder‑specific misfire codes
• Hard starts, higher fuel use, or sulphurous exhaust smell

If one cylinder is misfiring and testing points to the coil, it’s fine to replace just the faulty unit. On higher‑kilometre cars, some owners choose to replace the full set proactively when doing plugs, but it’s not mandatory. When fitting, ensure the plug gap and torque are correct, seat the coil fully, and keep the plug tubes clean and dry. Avoid blasting the engine bay with high‑pressure water, trapped moisture in the plug wells can arc out a coil. Quality OE‑equivalent coils from recognised brands match the factory specification, and a brief road test plus a post‑repair scan will confirm the fix.

Popular questions about 2020 Mitsubishi Eclipse Cross ignition coils

How long do ignition coils last on a 2020 Eclipse Cross?
There’s no fixed lifespan, but many last well past 150,000 km. Heat, vibration, and worn spark plugs are the usual coil killers. Sticking to the correct plug type and interval, and keeping moisture out of the plug wells, gives the coils an easier life.

What are the symptoms of a failing coil on the Eclipse Cross?
Look for a rough idle, hesitation under load, higher fuel use, and a Check Engine light. A scan tool will often show P0301–P0304 misfire codes pointing at the affected cylinder. If a coil fails completely, the engine will feel flat and shaky.

Can coils be replaced individually, and is DIY okay?
Yes, it’s a coil-on-plug setup, so each cylinder has its own coil and they can be swapped individually. Competent DIYers with basic tools can handle it: disconnect the battery, remove the engine cover, lift the coil, and refit carefully. If under warranty or unsure, a licensed technician is the safe bet.