Parts for your 2015 Mitsubishi Asx-Ignition coils

2015 Mitsubishi ASX Ignition Coils — What They Do and When To Replace

Technical sources including the Mitsubishi Motors Workshop Manual for ASX/RVR/Outlander Sport (MY2015), the Mitsubishi ASA electronic parts catalogue, and NGK/NTK vehicle application data confirm that 2015 Mitsubishi ASX petrol variants use individual coil-on-plug ignition coils. Diesel variants (where fitted in some markets) don’t use ignition coils, they rely on compression ignition and glow plugs instead, so ignition coils are not relevant to those models.

For petrol models, each cylinder gets its own coil mounted directly on the spark plug. That coil-on-plug setup delivers a strong, precisely timed spark, helping the 2.0-litre MIVEC engine start cleanly, idle smoothly, and pull well through the revs. It’s a simple, reliable design with fewer moving parts than old-school distributor systems.

Ignition coils aren’t a scheduled replacement item in the ASX, they’re typically changed when faulty. Still, they benefit from a quick check whenever spark plugs are serviced. Common signs a coil is on the way out include rough idle, hesitation under load, harder starting, a noticeable drop in fuel economy, and a glowing check engine light with misfire codes (often P0300–P0304). If one coil fails on a higher‑kilometre car, it can be smart to test all four and replace any weak units together to avoid repeat visits.

When servicing the 2015 ASX ignition coils, a few workshop-friendly tips keep things tidy:

• Inspect coil boots for cracking, carbon tracking, or oil contamination, oil in the plug wells points to a rocker cover gasket leak that should be fixed.
• Use quality iridium plugs at the correct gap, and apply a tiny smear of dielectric grease inside the boot to aid sealing and future removal.
• Seat the coil squarely on the plug, tighten the retaining bolt to spec, and clip the connector until it clicks—loose plugs or connectors can mimic coil faults.
• If chasing a misfire, swap a suspect coil to another cylinder and see if the fault follows before replacing parts.

Owners can expect long service life from genuine or reputable-brand coils. For peace of mind on Aussie and Kiwi roads—especially before long trips—pair fresh plugs with a quick coil inspection as part of routine servicing. And if your ASX is the diesel variant, skip the coils altogether and have the glow plugs and intake system checked instead.

Popular questions about 2015 Mitsubishi ASX ignition coils

Do all 2015 Mitsubishi ASX models have ignition coils?
Petrol models do—each cylinder has its own coil-on-plug unit. Diesel variants don’t use ignition coils at all, they use glow plugs and compression ignition, so coils aren’t fitted or required.

How long do ignition coils last on a 2015 ASX?
They’re not a routine replacement item and often last well past 150,000 km. Heat, oil contamination, and worn spark plugs can shorten their life. If misfires or starting issues appear, test before replacing.

Can a bad ignition coil damage the catalytic converter?
Yes. A persistent misfire from a failing coil can send unburnt fuel into the exhaust, overheating and damaging the catalyst. Address misfires promptly to protect the converter and maintain fuel economy.