Parts for your 2014 Mitsubishi Asx-Spark plugs

2014 Mitsubishi ASX Spark Plugs: What They Do and When to Replace Them

Based on Mitsubishi’s 2014 ASX Owner’s Manual and Service Schedule for AU/NZ markets, plus NGK and Denso fitment catalogues, spark plugs are fitted to 2014 ASX petrol models (commonly the 2.0‑litre MIVEC 4B11). Diesel variants (such as the 2.2‑litre Di‑D 4N14) don’t use spark plugs, they use glow plugs for cold starts. So if the vehicle is a petrol ASX, spark plugs are absolutely relevant, if it’s a diesel, they’re not part of the ignition system.

For the petrol 2014 ASX, spark plugs are the little heroes that ignite the air–fuel mix in each cylinder, keeping the engine smooth, punchy, and efficient. Modern ASX petrol models typically run long‑life iridium or platinum plugs, chosen by Mitsubishi for strong spark performance and durability. When spark plugs are in good nick, the engine starts quickly, idles cleanly, and uses less fuel.

As part of regular servicing, the logbook calls for inspection and periodic replacement of the plugs at long intervals (often around 90,000–100,000 kilometres or time‑based, whichever comes first—always follow the vehicle’s service handbook). Short trips, dusty conditions, or a misfire history can justify earlier checks. Sticking with the correct plug type and heat range specified for the ASX petrol engine is the safest bet, reputable OE‑equivalent options from major brands match Mitsubishi’s requirements.

Signs the ASX might want fresh spark plugs include rough idle, sluggish take‑off, increased fuel use, or a check‑engine light for misfires. During a service, a good technician will:

• Inspect plug condition and the coil boots for tracking or cracks
• Replace plugs per the schedule, fitting only the specified type
• Avoid anti‑seize unless the plug maker explicitly allows it
• Torque to spec and keep the plug gap as supplied for iridium/platinum types

DIY‑inclined owners should always start with a stone‑cold engine, blow out debris around the plug wells, and use the correct spark plug socket. If in doubt, leave it to a trusted workshop—incorrect torque or the wrong heat range can cause headaches.

If the 2014 ASX is a diesel, there are no spark plugs to service. Instead, attention turns to glow plugs and the fuel system—different parts, different maintenance.

Popular questions about 2014 Mitsubishi ASX spark plugs

How often should spark plugs be replaced on a 2014 ASX petrol?
Most petrol ASX models use long‑life plugs that typically last around 90,000–100,000 kilometres or a set number of years as per the logbook. Heavy city driving, lots of short trips, or rough running can justify earlier inspection. Always follow the service schedule printed for the exact VIN and engine.

What type of spark plug is best for the 2014 ASX petrol?
Stick with the OEM‑specified iridium or platinum heat range and thread size for the 2.0‑litre MIVEC engine. Using the correct spec from a recognised brand keeps performance, economy, and emissions on target. Avoid mixing heat ranges or “universal” plugs.

Does the 2014 ASX diesel have spark plugs?
No. Diesel variants don’t use spark plugs, they use glow plugs to help with cold starts. If the ASX is a Di‑D diesel, spark‑plug maintenance doesn’t apply—check glow plugs and diesel‑specific service items instead.