Parts for your 2007 Mitsubishi Lancer-Ignition coils

2007 Mitsubishi Lancer ignition coils

Ignition coils are definitely used on the 2007 Mitsubishi Lancer. Factory service information for the CH and early CJ series, plus common parts catalogues from Mitsubishi ASA, NGK and Bosch, list ignition coils for the 2007 Lancer’s petrol engines. Depending on the exact engine, the car runs either coil-on-plug units (e.g., 4B11 in late-2007 CJ) or paired coil packs with leads (common on CH models with 4G94/4G69). Diesel Lancers don’t use ignition coils, but a diesel option wasn’t typically sold in AU/NZ for 2007.

On this model, the ignition coil’s job is to step up the 12-volt battery supply into the high voltage needed to fire the spark plugs. Healthy coils mean clean starts, smooth idle, decent fuel economy and lower emissions. When a coil weakens or fails, the engine can misfire, run rough and light the check engine lamp. Keep driving like that and the catalytic converter can cop it.

Coils aren’t a scheduled replacement item, but they should be inspected whenever spark plugs are serviced. A sensible practice on a 2007 Lancer is to check coils during plug changes (often around 90,000–100,000 km, per plug brand and engine spec). Look for cracks in the housing, swollen or carbon-tracked boots, corrosion on terminals, oil in the plug tubes (a rocker cover gasket issue), and scan for misfire codes (P0300–P0304). Many original coils last well past 150,000 km, but heat and age eventually take their toll.

• Common symptoms of a failing coil: rough idle, hesitation under load, hard starting, poor fuel economy, and a flashing or steady check engine light.
• If the car has a twin coil-pack and leads, check lead condition and routing, replace brittle or oil-soaked leads.

When replacing, choose quality OEM-equivalent coils. For coil-on-plug units, replace any perished boots and use a small smear of dielectric grease inside the boot. Torque the coil hold-down bolts carefully (around 8–10 Nm is typical, confirm in the service manual for the specific engine), keep connectors clean and seated, and clear any stored fault codes after the repair. If oil is found in the plug wells, sort the rocker cover gasket at the same time to avoid repeat failures. On twin-pack systems, route leads exactly by cylinder number and clip them away from heat.

Done properly under the bonnet with the right parts, coil service keeps the Lancer perky, efficient and easy to live with around town and on the open road.

FAQs

What are the symptoms of a failing ignition coil on a 2007 Mitsubishi Lancer?
Expect a rough or lumpy idle, hesitation under load, sluggish take-off, harder cold starts and worse fuel use. The check engine light often appears, and a scan may show P0300–P0304 misfire codes. Prolonged misfire can damage the catalytic converter, so it’s best sorted quickly.

Should all ignition coils be replaced at once?
Not always. If testing and fault codes point to a single weak coil, it’s fine to replace just that one. That said, on higher-kilometre cars with the original set, many owners choose to replace the full set to avoid repeat workshops visits.

How long do ignition coils last on a 2007 Lancer?
There’s no fixed interval. Many last 150,000–250,000 km, but heat, vibration and oil contamination shorten life. Inspect at each spark plug service, keep plug gaps to spec, fix any rocker cover leaks, and coils tend to go the distance.