Parts for your 2012 Nissan Pathfinder-Ignition coils

2012 Nissan Pathfinder ignition coils

Ignition coils are relevant to many 2012 Nissan Pathfinders, but not all. Technical sources including the Nissan Pathfinder R51 Factory Service Manual (EC section, VQ40DE) describe a coil-on-plug ignition system with one coil per cylinder on the 4.0L V6 petrol. The same manuals for the YD25DDTi diesel show compression ignition with glow plugs and no ignition coils. Nissan’s FAST parts catalogue likewise lists six individual coils for VQ40DE variants and none for the diesel. So: petrol V6 models use ignition coils, diesel models do not.

For 2012 Pathfinder owners with the VQ40DE petrol V6, the ignition coils are the unsung heroes that turn the battery’s 12 volts into the serious high voltage needed to fire the spark plugs. Each cylinder gets its own coil (coil-on-plug), which keeps spark strong, emissions in check, and fuel economy on point. When they’re healthy, the engine idles smoothly, pulls cleanly under load, and the check engine light stays off.

There’s no strict “change-by” interval for coils, but they deserve attention whenever the spark plugs are serviced (typically around 160,000 km on the VQ40DE—always confirm with the service schedule for your market). During servicing, a tech should check for cracked boots, oil or moisture in the plug tubes, heat damage, or green/white corrosion on connectors. If the rocker cover gaskets seep oil into the plug wells, sort that early—it’s a coil killer.

• Common symptoms of a failing coil: rough idle, hesitation, poor fuel economy, hard starting, and a flashing or steady check engine light (often misfire codes like P030X).
• Diagnosis tips: scan for codes, perform a coil swap test between cylinders, and inspect plugs. Resistance tests aren’t very conclusive on modern coils—live data and swaps are more telling.

Replacement is straightforward on the V6: disconnect the battery, remove the engine cover, unplug the coil connector, and lift the coil out after undoing its retaining bolt. Fit quality OE-spec coils and new spark plugs if they’re due, torque plugs to the service manual spec, and apply a dab of dielectric grease to the boot. It’s fine to replace just the failed coil, however, on high-kilometre vehicles experiencing multiple intermittent misfires, many workshops recommend replacing the set to avoid repeat visits.

Diesel owners can relax on this front—there are no ignition coils on the YD25DDTi, so misfire-like symptoms are more likely related to glow plugs, injectors, air leaks, or fuel delivery.

Popular questions

How many ignition coils are on a 2012 Nissan Pathfinder?
VQ40DE petrol models have six—one coil per cylinder in a coil-on-plug setup. The YD25DDTi diesel doesn’t use ignition coils at all, as it relies on compression ignition and glow plugs for cold starts.

Should all coils be replaced at once?
It isn’t mandatory. Replacing the single faulty coil is acceptable if the others test fine. If the vehicle has high kilometres and shows recurring misfires across different cylinders, replacing the full set can be cost-effective and reduce downtime.

What are the tell-tale signs a coil is failing?
A shaky idle, hesitation on hills, higher fuel use, and a check engine light are common. A scan tool will often show a cylinder-specific misfire code. Wet or oily plug tubes and cracked boots are visual clues that a coil has had a hard time and may not be far off failing.