Parts for your 2017 Mitsubishi Eclipse cross-Ignition coils

2017 Mitsubishi Eclipse Cross ignition coils

Ignition coils are fitted to the 2017 Mitsubishi Eclipse Cross petrol models. Technical sources that document this include the Mitsubishi Motors Eclipse Cross workshop manual (Engine Electrical — Ignition System for the 1.5L MIVEC turbo/4B40) and major ignition component catalogues from OE suppliers such as NGK and Denso, all of which specify a coil‑on‑plug setup with one coil per cylinder. Only diesel variants (which rely on compression ignition) do not use ignition coils, but the 2017 petrol Eclipse Cross absolutely does.

On the 2017 Eclipse Cross petrol, the ignition coils sit directly on top of the spark plugs. Their job is to step the 12‑volt battery supply up to the thousands of volts needed to fire the spark across the plug gap, reliably and repeatedly under boost and across all temperatures. Strong, consistent spark is vital on this direct‑injected turbo engine for smooth idle, good fuel economy and low emissions.

There’s no fixed replacement interval for coils, they’re generally replaced on condition. Typical warning signs include hard starting, rough idle, hesitation under load, reduced power, higher fuel use, and a flashing or steady check‑engine light with misfire codes (P0300–P0304). Because heat and vibration live right above the plugs, coils can age faster if spark plugs are overdue or if oil or moisture gets into the plug wells.

As part of regular servicing of a 2017 Eclipse Cross, a mechanic will usually:

• Scan for misfire codes and live misfire counters, and road‑test under load.
• Inspect coil connectors, boots and plug wells for heat damage, moisture or oil intrusion from the rocker cover gasket.
• Replace spark plugs at the recommended interval (around the 90,000–100,000 km mark, per service literature), as tired plugs make coils work harder.
• Refit coils carefully, keeping the boots clean and dry, use only coils that meet Mitsubishi OE specification.

If one coil fails, many techs will replace just the faulty unit after confirming the fault by swapping coils between cylinders. On higher‑kilometre cars or where multiple coils test weak, replacing the set can prevent repeat visits. Avoid pressure‑washing the engine bay, and if the vehicle has been through deep water, have the plug wells checked. Keeping the ignition system healthy helps the Eclipse Cross run crisply and protects the catalytic converter from raw‑fuel misfire damage.

Popular questions about 2017 Mitsubishi Eclipse Cross ignition coils

How long do ignition coils last on a 2017 Eclipse Cross?
Many last well past 120,000 km, but lifespan varies with heat, driving style and spark‑plug maintenance. Coils tend to live longer when plugs are replaced on time and the plug wells stay clean and dry. Replace a coil when diagnostics confirm a misfire traced to that cylinder.

Should all coils be replaced at once?
Not always. If a single coil has failed and the others test strong, replacing just the faulty one is fine. If the vehicle has high kilometres or multiple intermittent misfires, replacing the full set can be more cost‑effective and reduce future downtime.

Can a bad coil damage other parts?
Yes. Persistent misfire can overheat the catalytic converter and foul the spark plug. It can also cause rough running that stresses engine mounts. It’s best to diagnose and repair coil‑related misfires promptly.