Mitsubishi ASX Spark Plugs: Intervals, Fitment & Warning Signs
On the ASX, swapping plugs between two cylinders genuinely helps isolate whether a misfire is caused by the plug or something else entirely.
Illustration for editorial purposes
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Mitsubishi ASX Spark Plugs: OEM Part Number
Mitsubishi ASX Spark Plugs: A Cheap Part That Causes Expensive-Feeling Problems
The Mitsubishi ASX's spark plugs rarely fail dramatically; they just quietly degrade, showing up as a rougher idle or slightly blunted acceleration that gets blamed on other things. The part costs next to nothing, which paradoxically makes it one of the most commonly neglected items under the bonnet.
Mitsubishi ASX Spark Plugs: What They Do
On the Mitsubishi ASX, the compressed fuel-air mixture in each cylinder is ignited by the spark plugs, and their condition feeds directly into combustion efficiency, fuel economy and how smoothly the engine runs. Only petrol engines use them; diesels rely on compression alone.
Mitsubishi ASX Spark Plugs: Generations & Spark Plug Count
| Diesel variants, where fitted | Not applicable — diesel engines use compression ignition and have no spark plugs at all |
|---|---|
| Petrol variants (all trims) | 4 spark plugs — one per cylinder |
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A Genuinely Useful, Real Diagnostic Technique Worth Trying — Mitsubishi ASX Spark Plugs
If you're chasing a single-cylinder misfire after a plug replacement, this is genuinely worth trying: swapping the plugs between two cylinders and seeing whether the misfire follows the plug to its new cylinder is a genuinely useful, classic diagnostic technique. If the misfire moves with the swapped plug, the plug itself is likely the culprit; if it stays on the original cylinder, it points toward the coil, wiring, or an injector instead.
It's also genuinely worth knowing an honest warning worth taking seriously: the relationship between Mitsubishi's electronics and aftermarket ignition components can be genuinely unpredictable, worth bearing in mind when choosing replacement coils specifically.
Mitsubishi ASX Spark Plugs: Warning Signs, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Spark Plugs Guide for symptoms of worn plugs, why matching your exact plug specification matters, and trusted brands to buy from.
More Mitsubishi Spark Plugs
The same part, covered across other Mitsubishi models.