Parts for your 2008 Nissan Navara-Ignition coils

2008 Nissan Navara ignition coils: what they do, and when to sort them out

First things first: do 2008 Nissan Navaras even use ignition coils? According to the Nissan Navara D40 Factory Service Manual (EC sections for QR25DE and VQ40DE) and Nissan’s FAST parts catalogue, the petrol models (2.5 QR25DE and 4.0 V6 VQ40DE) run individual coil-on-plug ignition coils. The YD25DDTi diesel, covered in the D40 diesel Engine Control and Engine Mechanical sections, doesn’t use ignition coils at all—it relies on compression ignition and glow plugs. So, if the ute’s petrol, ignition coils are relevant, if it’s the popular YD25 diesel, they’re not part of the vehicle.

For 2008 Navara petrol models, those coil-on-plug units are the spark-makers. Each coil transforms the battery’s 12 volts into the high voltage needed to jump the spark plug gap, lighting off the air–fuel charge at the right moment. Being mounted directly on the plugs cuts losses, sharpens timing control, and helps with smoother running and better fuel economy.

Over time, heat cycling under the bonnet, oil mist, and moisture can tire coils out. Common signs include a rough idle, flat spots under load, increased fuel use, and a flashing or steady check engine light—often with P0300–P030X misfire codes. If it’s been through deep water or there’s a leaky rocker cover gasket, coil boots can carbon-track and start arcing.

• When to replace: coils aren’t a fixed-interval item, but many owners see failures between 120,000–200,000 km. If one fails on a high‑kilometre Navara, it’s worth assessing the others.
• Best practice: fit new spark plugs when replacing a coil, inspect coil boots for cracks, and use a dab of dielectric grease on the inside of the boots to keep moisture at bay.
• Diagnosis tip: swap the suspect coil to another cylinder and see if the misfire code follows—handy for isolating a single dud unit.
• Quality matters: choose OE or reputable aftermarket coils with proper heat resistance for Aussie and Kiwi conditions.

During routine servicing, a quick visual once-over of the coils and loom, checking for oil in the plug wells and brittle wiring, goes a long way. Keep the plug gaps within spec and fix any gasket leaks early—coils hate swimming. Treated right, a fresh set will keep the petrol Navara lighting up cleanly for many more kilometres.

If the 2008 Navara is a YD25 diesel, ignition coils aren’t used because a diesel ignites fuel by compressing air until it’s hot enough to burn injected diesel—no spark required. The diesel’s starting aid is the glow plug system, not an ignition system, which is why the D40 diesel manuals and parts listings omit coils entirely.

Popular questions about 2008 Nissan Navara ignition coils

How many ignition coils does a 2008 Navara have?
Petrol models use one coil per cylinder—four on the 2.5 QR25DE and six on the 4.0 VQ40DE. Diesel YD25DDTi models don’t have ignition coils at all, they use glow plugs and compression ignition.

What are the common symptoms of a failing ignition coil on a 2008 Navara?
Expect a rough idle, hesitation under load, higher fuel use, and a check engine light with misfire codes (P0300–P030X). You might notice a raw fuel smell from the exhaust and a clear loss of power, especially climbing hills or towing.

Should ignition coils be replaced individually or as a set?
It’s fine to replace a single failed coil if the vehicle’s lower mileage and the others test well. On higher‑kilometre petrol Navaras, many workshops recommend replacing coils in sets (and fitting new plugs) to avoid repeat visits, especially if multiple coils test weak or boots are perished.