Parts for your 2009 Nissan Pathfinder-Ignition coils

2009 Nissan Pathfinder Ignition Coils

Ignition coils are fitted to 2009 Nissan Pathfinder models with the 4.0‑litre V6 petrol (VQ40DE) engine, which uses a coil‑on‑plug setup with six individual coils. Technical sources confirming this include the Nissan R51 Pathfinder Factory Service Manual (EC section for VQ40DE: Ignition System), Nissan’s electronic parts catalogue (FAST) listing six COP coils for VQ40DE, and major ignition component catalogues from OE suppliers such as Hitachi, Denso and NGK that specify direct‑fit coils for the 4.0 V6. By contrast, 2009 Pathfinders with the 2.5‑litre YD25DDTi turbo‑diesel do not use ignition coils at all, diesel engines rely on compression ignition and a glow plug system for cold starts, as detailed in the R51 FSM EC section for YD25 (Glow Plug/Starting Aid). So coils are relevant for the petrol V6, and not used on the diesel.

On V6 petrol Pathfinders, each ignition coil sits directly over its spark plug under the plastic engine cover, turning the 12‑volt battery supply into the high voltage needed to fire the plug. This coil‑on‑plug design keeps the spark strong and consistent, helping cold starts, smooth idle and decent fuel economy on long Kiwi and Aussie road trips.

Coils generally aren’t a scheduled “every X kilometres” item, but they do wear with heat and age. Drivers might notice a rough idle, a hesitation under load, a drop in fuel economy, or a flashing check‑engine light. Common scan codes include P030X (cylinder misfire) or P035X (ignition coil circuit). Under the bonnet, oil in the plug tubes from a rocker cover gasket leak or moisture after a vigorous engine wash can shorten coil life.

Good practice during servicing:

• Inspect coil boots and connectors whenever spark plugs are checked or replaced (often around 100,000 km for iridium plugs, depending on service schedule).
• If a single coil fails, it can be replaced on its own, however, on high‑kilometre vehicles, replacing the affected coil and any others showing similar wear can save repeat labour.
• Use OE‑quality coils and ensure plugs are the correct heat range and gap, mismatched or worn plugs can overwork new coils.
• Keep plug wells clean and dry, fix any cam cover gasket leaks promptly.
• When fitting, seat the boot fully on the plug, click the connector home, and tighten the small coil bolt to the light torque specified in the service manual (don’t overdo it).

Look after the coils and plugs and the VQ40DE will usually start first turn, tow confidently, and cruise smoothly for years.

Popular questions about 2009 Nissan Pathfinder ignition coils

How many ignition coils does a 2009 Pathfinder have?
The V6 petrol has six individual coil‑on‑plug units, one per cylinder. The 2.5‑litre turbo‑diesel uses no ignition coils at all, relying on compression ignition and glow plugs for cold starts.

What are the signs of a failing coil on a V6 Pathfinder?
Expect a rough idle, misfire under load, sluggish acceleration, or worse fuel economy. The check‑engine light may pop up with codes like P0301–P0306 or P0351–P0356. If the misfire is persistent or the light flashes, reduce load and have it scanned promptly to avoid catalyst damage.

Should all coils be replaced at once?
It’s fine to replace just the faulty coil. If the vehicle has high kilometres and more than one coil is weak, replacing the affected coil plus any others showing similar symptoms can be cost‑effective. Always check spark plugs and plug tube seals at the same time.