Parts for your 2010 Nissan Navara-Ignition coils

2010 Nissan Navara ignition coils — what’s fitted, what they do, and when to replace

Whether a 2010 Nissan Navara uses ignition coils depends on the engine. The petrol V6 (VQ40DE) is factory‑fitted with coil‑on‑plug ignition coils. The common diesel variants (YD25DDTi 2.5 and V9X 3.0 V6) do not use ignition coils because they are compression‑ignition engines. This is confirmed by the Nissan Navara D40 Service Manual: the EC section for VQ40DE shows individual coil‑on‑plug ignition, while the EC/EM sections for YD25DDTi and V9X outline diesel combustion with glow plugs and no spark system. Nissan parts catalogues likewise list ignition coils for VQ40DE only.

For VQ40DE petrol models, the ignition coil’s job is to step battery voltage up and fire the spark plug directly at each cylinder. Being coil‑on‑plug, there are no traditional leads — each coil sits over its spark plug, with the ECU controlling dwell and timing for a clean burn, smooth idle, and decent fuel economy.

They aren’t a routine “change by date” item, but coils can fail with age, heat, or oil contamination. Signs include a rough idle, loss of power under load, higher fuel use, a flashing check‑engine light, and OBD‑II misfire codes (P0300–P0306). A quick test is to swap a suspect coil to another cylinder and see if the misfire follows. It’s also smart to check for oil in the plug tubes from a rocker cover gasket leak, which can cook a coil and its rubber boot.

Replacement is straight‑forward: disconnect the battery, lift the engine cover, unplug the coil connector, undo the hold‑down bolt, and draw the coil straight up. Fit the new unit (or a new boot if only the boot is perished), apply a small dab of dielectric grease on the inside of the boot, reconnect, and tighten to the manufacturer’s torque spec. Quality coils from reputable brands (or genuine) are worth it to avoid repeat faults. If the vehicle has done big kilometres or multiple coils are the same age, replacing them as a set can save time later, otherwise, replacing only the failed coil is fine.

• Keep water away from the top of the engine when washing under‑bonnet.
• Stick to the spark plug interval (often 100,000 km for iridium). Old plugs stress coils.
• Fix any oil leaks into plug wells promptly.

For YD25DDTi and V9X diesels, ignition coils aren’t used at all — diesel fuel ignites from high compression, so these engines use glow plugs for cold starts and high‑pressure injection for combustion, with no spark system fitted or required.

Popular questions about 2010 Nissan Navara ignition coils

Does a 2010 Navara have ignition coils?
Petrol V6 (VQ40DE) models do — they use a coil‑on‑plug setup. Diesel YD25DDTi and V9X models don’t have ignition coils, as they rely on compression ignition and glow plugs. This layout is detailed in the D40 service manual and reflected in OEM parts listings.

What are the symptoms of a bad ignition coil on a Navara V6?
Common signs are a shaky idle, hesitation under load, poor fuel economy, and a check‑engine light with misfire codes. If the misfire shifts when swapping coils between cylinders, the coil is likely the culprit. Inspect plug boots and look for oil in the plug tubes too.

Should coils be replaced with the spark plugs?
Coils don’t have a fixed expiry like plugs. If the Navara is high‑kilometre or several coils are weak, doing coils when you do plugs can be efficient. Otherwise, replace only any failed coil and always use new plugs of the correct spec to reduce coil stress.