Parts for your 2020 Mitsubishi Eclipse cross-Spark plugs

2020 Mitsubishi Eclipse Cross spark plugs: what they do and when to replace

Yes, spark plugs are absolutely relevant to the 2020 Mitsubishi Eclipse Cross. The model runs petrol spark-ignition engines (the 1.5L MIVEC turbo, and in some markets a 2.0L petrol), which require spark plugs to ignite the air–fuel mix. This is confirmed in Mitsubishi Motors’ 2020 Eclipse Cross Owner’s Manual and Service/Warranty Schedule, and by major parts catalogues from NGK and Denso that list long-life iridium plugs for this vehicle.

In day-to-day driving, the spark plugs are the quiet achievers that kick off every combustion event. Each plug delivers a precisely timed spark so the turbocharged MIVEC engine fires cleanly, pulls smoothly, and keeps fuel use in check. Modern iridium plugs specified for the Eclipse Cross are designed to last far longer than old copper types, holding a sharp centre electrode that resists wear and helps the engine start crisply on cold Kiwi mornings or hot Aussie afternoons.

For servicing, Mitsubishi sets replacement under its maintenance schedule, many owners in Australia and New Zealand find the practical interval sits around the 90,000–100,000 km mark for iridium plugs in normal use. If the vehicle does lots of short trips, towing, idling, or sees dusty roads, bring that forward. Waiting too long can lead to rough idle, flat spots under load, higher fuel consumption, and misfire fault codes that can stress the catalytic converter.

When it’s time, it’s best practice to replace all four plugs as a set with OEM-spec iridium plugs, check the coil boots, and install to the workshop torque in the service manual. Iridium gaps come pre-set, don’t force-gap them. Work on a warm (not hot) engine, keep debris out of the plug wells, and use a quality thin-wall spark plug socket. Anti-seize is generally not recommended on modern nickel-plated plug threads unless the plug maker specifically instructs it.

• Tell-tale signs it’s due: harder starting, rough idle, sluggish acceleration, increased fuel use, and a flashing or steady check engine light for misfire.
• Good habits: follow the Mitsubishi schedule, use quality fuel, and pair plug replacement with an air filter check for a smoother, more efficient drive.

Technical references: Mitsubishi Motors 2020 Eclipse Cross Owner’s Manual and Service/Warranty Schedule, NGK and Denso application catalogues, Mitsubishi workshop procedures for coil-on-plug ignition and spark plug service.

Popular questions

What spark plug type does a 2020 Eclipse Cross use?
It uses long-life iridium spark plugs matched to Mitsubishi’s heat range and reach for the 1.5L MIVEC turbo (and 2.0L petrol where fitted). The gap is factory set and shouldn’t be adjusted. Always choose OEM-spec plugs listed in the owner’s manual or reputable catalogues from brands like NGK or Denso.

How often should the spark plugs be replaced?
Follow Mitsubishi’s schedule shown in the Service/Warranty book. For most Aussie and Kiwi drivers, a practical target is around 90,000–100,000 km for iridium plugs. If the car does lots of short trips, towing, or drives in dusty conditions, consider replacing earlier to keep performance and economy spot-on.

Can a home mechanic replace them?
Yes, if comfortable with coil-on-plug ignition and using a torque wrench. You’ll need a thin-wall spark plug socket, extensions, and care routing the coils. If any plug feels stuck, don’t force it—seek a technician to avoid thread damage in the alloy head.