Parts for your 2017 Mitsubishi Eclipse cross-Spark plugs

2017 Mitsubishi Eclipse Cross Spark Plugs

Yes, spark plugs are used on the 2017 Mitsubishi Eclipse Cross. The model launched with a 1.5‑litre MIVEC turbocharged petrol engine, which relies on spark plugs for ignition. This is confirmed by Mitsubishi’s Eclipse Cross Owner’s Manual and service schedule for the 2017 model, as well as NGK and Denso application catalogues that list iridium plugs for the 1.5T engine. While some markets later offered a 2.2‑litre diesel (which uses glow plugs, not spark plugs), the 2017 petrol variant sold in Australia and New Zealand is fitted with four spark plugs.

Spark plugs do the hard yards of igniting the air–fuel mix inside the cylinders. In a modern direct‑injection turbo like the Eclipse Cross, they’re critical for clean starts, smooth idle, strong mid‑range punch, good fuel economy, and keeping emissions in check. Fine‑wire iridium plugs are specified because they deliver a strong spark with less voltage, resist fouling better, and last longer under the higher pressures and temperatures of a turbo engine.

As part of regular servicing, the plugs should be inspected periodically and replaced at the interval specified in the handbook. In typical Aussie and Kiwi driving, iridium plugs often run out to around 90,000–100,000 km, but shorter intervals may apply with frequent short trips, heavy towing, or dusty conditions. Always fit OE‑equivalent iridium plugs with the correct heat range. They come pre‑gapped, don’t force the gap on fine‑wire tips. Replace all four at once, and tighten to the workshop manual torque on a cool engine.

• Signs it’s time: hard starting, rough idle, misfires under load, sluggish acceleration, and higher fuel use.
• Service tips: blow debris from plug wells before removal, check coil boots for cracks, apply a tiny amount of dielectric grease inside boots, avoid anti‑seize unless the plug maker specifies it.
• Fuel quality helps: quality 95 RON petrol and regular servicing keep plugs cleaner in GDI turbos.

A technician will remove the engine cover, unplug the coil‑on‑plug units, and swap the plugs with care. Following Mitsubishi’s service data and reputable plug maker guidance (e.g., NGK and Denso technical bulletins) helps ensure reliable ignition and protects the alloy cylinder head threads.

Q: What spark plug type and gap does a 2017 Eclipse Cross use?

It uses long‑life iridium fine‑wire spark plugs to the Mitsubishi spec. The plugs are supplied pre‑gapped (typically around 1.0–1.1 mm). Don’t force the gap on iridium tips, confirm the exact spec on the under‑bonnet label or in the owner’s manual.

Q: How often should the spark plugs be replaced?

Under normal conditions, expect replacement roughly every 90,000–100,000 km or when inspection shows wear. In harsher use—lots of stop‑start, short hops, or dusty roads—bring that forward and have them checked more frequently during scheduled services.

Q: Can worn spark plugs harm other components?

Yes. Persistent misfires send unburnt fuel into the exhaust, which can overheat the catalytic converter and stress the turbo. Fresh, correctly specified plugs help protect these components and keep performance and economy on song.