Parts for your 2017 Mitsubishi Asx-Ignition leads

2017 Mitsubishi ASX ignition leads — are they used?

Short answer: no, the 2017 Mitsubishi ASX doesn’t use traditional ignition leads (spark plug leads). Technical sources show it runs a coil-on-plug (COP) ignition system on its petrol engines, and diesel variants have no spark system at all. The Mitsubishi Motors workshop manual for ASX/RVR/Outlander Sport (Ignition System section) specifies an individual pencil-type ignition coil directly on each spark plug. The Mitsubishi electronic parts catalogue (ASA/EPC) lists coils and plugs but no high‑tension lead set. Independent catalogues from ignition specialists (e.g., NGK and Denso) also list individual ignition coils for these engines rather than a lead kit. That combination confirms ignition leads are not relevant to this model year ASX.

Why no ignition leads? With coil-on-plug, each cylinder gets its own coil mounted straight onto the spark plug under the engine cover. That design ditches the old-school high-voltage leads, improving spark energy, reliability and timing control, while cutting electrical losses and interference. It’s lighter, neater and far less prone to the moisture tracking, cracking and resistance build-up that used to plague lead sets.

What does that mean for servicing in Australia and New Zealand? Owners and workshops won’t be chasing “lead” problems because there aren’t any. Instead, the focus is on:

• Replacing spark plugs at the logbook interval (often around 90,000–100,000 km for iridium types, check the ASX service schedule).
• Inspecting coil boots and seals for hardening, tracking marks or oil contamination from the rocker cover gasket.
• Checking coil electrical connectors for secure fit and corrosion, especially if the vehicle sees a lot of water crossings or engine bay washing.
• Scanning for misfire fault codes and confirming plug gap and torque if a rough idle or hesitation pops up.

If the 2017 ASX is misfiring, it’s far more likely to be a worn plug, a tired individual coil, a split coil boot, or oil/water in a plug well rather than anything to do with leads. Under the bonnet you’ll find four individual coils sitting over the plugs—no distributor, no lead set to route, and nothing to “upgrade” in that area.

FAQs

Does a 2017 Mitsubishi ASX have ignition leads?
No. Petrol ASX models use a coil-on-plug setup with an individual coil per cylinder, so there are no high-tension leads. Diesel variants don’t use spark ignition at all.

What should be serviced instead of ignition leads?
Follow the logbook for spark plug replacement, inspect the coil boots and seals, and check for oil or moisture in the plug wells. If there’s a misfire, test the individual coil on the affected cylinder and verify plug condition and gap.

Can ignition leads be fitted as an upgrade?
There’s no practical or reliable way to “retrofit” leads. The ECU, wiring and packaging are designed for coil-on-plug. If better performance or smoother running is the goal, use the correct iridium plugs, ensure the coils are healthy and keep up with scheduled servicing.