Parts for your 2002 Nissan Navara-Ignition coils

2002 Nissan Navara ignition coils — what’s fitted and how to look after them

Ignition coils are relevant on the 2002 Nissan Navara if it’s a petrol model. According to the Nissan Navara D22 Factory Service Manual (EC/IG sections for the KA24DE), the 2.4‑litre petrol uses a distributor‑type ignition system with a separate ignition coil and an ignition power transistor (ignitor). Industry catalogues from brands commonly supplying Australia and New Zealand also list an ignition coil for the D22 2.4 petrol. By contrast, Nissan’s diesel technical literature (ZD30DDT and QD32) shows no ignition coils because those engines use compression ignition and glow plugs for cold starts, not spark plugs or coils.

For owners of the 2.4 petrol KA24DE, the ignition coil’s job is to step battery voltage up to a high voltage so the spark can jump the plug gap and ignite the air‑fuel mix. On the D22 petrol, that single coil feeds the distributor, which sends spark to each cylinder at the right time. When the coil weakens, the spark gets lazy, and the ute can feel gutless, misfire under load, or be hard to start.

Good servicing keeps the coil happy. He’ll want to check the coil’s primary and secondary resistance against the Nissan spec during scheduled services, inspect the coil tower and HT lead for cracking or carbon tracking, and make sure the power and earth connections are clean and tight. Because the KA24DE uses a distributor, condition of the cap, rotor and leads matters just as much as the coil. If the leads are old or the cap is worn, the coil works harder and can give up sooner.

• Common symptoms of a failing coil: rough idle, stumble on hills, misfire when hot or in the wet, poor fuel economy, occasional backfire, or a no‑start. The check‑engine light may log random or cylinder‑specific misfire codes.
• Replacement approach: disconnect the battery, label and remove the HT lead, unbolt the coil bracket, swap in a quality coil matching the KA24DE spec, and refit. It’s a straightforward driveway job for most home mechanics.
• Service cadence: inspect at every major service, replace the coil only if out of spec or showing symptoms. Spark plugs and leads typically deserve replacement far more often than the coil.

If yours is a 2002 Navara diesel (ZD30DDT or QD32), there’s no ignition coil to service. Diesels ignite fuel from heat generated by compression, and only use glow plugs to help cold starting, so coils aren’t part of the system.

Popular questions

Does a 2002 Navara diesel have ignition coils?
No. The 2002 diesel Navara uses compression ignition and glow plugs, not spark plugs or coils. There’s nothing to replace or service in terms of ignition coils on the diesel.

What are the signs the ignition coil is failing on a 2.4 petrol?
Look for hard starting, rough idle, loss of power under load, misfires in the wet or when hot, and poorer fuel economy. You might also see a check‑engine light for misfire. Always inspect the leads, cap and rotor too, as they commonly mimic coil faults.

How often should the coil be replaced on the KA24DE?
There’s no fixed interval. Test and inspect it during major services and replace only if out of spec or showing symptoms. Prioritise fresh plugs at the correct gap and quality leads, they protect the coil and keep the spark strong.