Parts for your 2006 Mitsubishi Pajero-Spark plugs

2006 Mitsubishi Pajero spark plugs

Based on technical sources – including the Mitsubishi Pajero NS/NT Factory Service Manual for the 6G75/6G74 petrol V6 engines, the Mitsubishi 4M41 diesel engine manual, and the 2006 Pajero Owner’s Manual service schedule – spark plugs are fitted to 2006 Pajero petrol V6 models, while diesel (3.2 DI‑D/4M41) variants do not use spark plugs at all. Diesels rely on compression ignition and glow plugs for cold starts, so spark plugs aren’t relevant on those engines.

For 2006 Pajero petrol owners, spark plugs do an essential job: they ignite the air–fuel mix in each cylinder, keeping the big V6 smooth, punchy and efficient. Fresh, correctly gapped plugs help cold starts, throttle response and fuel economy, and they reduce misfires that can stress coils and catalytic converters. Mitsubishi specifies long‑life plugs on the V6, so while they don’t need attention at every service, they shouldn’t be ignored. As a rule of thumb, expect inspection around regular major services and replacement roughly every 90,000–100,000 kilometres or about six years, depending on plug type and your Owner’s Manual. High‑kilometre or dusty/outback use can justify earlier checks.

The V6 uses coil‑on‑plug ignition. The front bank is straightforward, but the rear bank typically requires removal of the upper intake plenum to access the plugs properly. That’s why many owners roll this job into a major service: new plenum gaskets are inexpensive, and a workshop can torque everything back to spec. When fitting new plugs, use quality iridium or platinum units specified for the engine, set to the book gap (do not force‑gap delicate iridium tips), and tighten to the factory torque with a torque wrench. Avoid anti‑seize on modern, nickel‑plated threads, a light smear of dielectric grease on the coil boots helps future removal and keeps moisture at bay.

• Signs it’s time: rough idle, harder starts, sluggish acceleration, pinging under load, poorer fuel economy, or a flashing/misfire warning.
• Good habits: check plug condition during major services, inspect coil boots for cracking, clear debris before removal, and replace all plugs as a set.

If the Pajero is the diesel DI‑D, spark plugs aren’t used at all, glow plugs handle cold starts, and any starting or misfire dramas should be diagnosed with diesel‑specific checks.

Popular questions

Do 2006 Pajero diesels have spark plugs?
No. The 3.2 DI‑D (4M41) diesel uses compression ignition and glow plugs for cold starts, so there are no spark plugs. Spark plugs apply only to the petrol V6 models of this year.

How often should spark plugs be replaced on a 2006 Pajero petrol V6?
For the 6G75/6G74 petrol V6, long‑life plugs typically go around 90,000–100,000 kilometres or about six years. Always follow the Owner’s Manual and adjust for harsh conditions or noticeable symptoms like misfires or poor economy.

Is intake plenum removal needed to change all the plugs on the V6?
Usually, yes. The rear bank is tucked under the upper intake plenum, so removal is common practice. It’s wise to replace the plenum gaskets and use correct torque procedures when refitting.