Parts for your 2008 Nissan Pathfinder-Spark plugs

2008 Nissan Pathfinder spark plugs — what they’re for and when to swap them

According to Nissan’s technical literature for the R51 Pathfinder (Owner’s Handbook and Service Manual EM/MA sections) and major application catalogues from NGK and Denso, the 2008 Nissan Pathfinder uses spark plugs only when fitted with the 4.0‑litre VQ40DE petrol V6 (six plugs, coil‑on‑plug). The 2.5‑litre YD25DDTi turbo‑diesel variant doesn’t use spark plugs at all, it relies on compression ignition and glow plugs for cold starts, so conventional spark plugs aren’t applicable to that engine.

For V6 petrol Pathfinders, spark plugs do the heavy lifting every time the key’s turned — they ignite the air–fuel mix so the VQ40DE fires cleanly, pulls hard and keeps fuel use in check. Good plugs help with smooth idle, punchy throttle response and lower emissions, which is why Nissan and plug makers specify long‑life platinum/iridium types for this engine.

Service-wise, the replacement interval depends on the exact plug type and local schedule, but long‑life plugs typically last around 100,000–160,000 km (or up to 6–10 years). Always confirm the interval, part number and gap in the Pathfinder handbook or the under‑bonnet label, and stick with plugs that meet Nissan’s spec for the VQ40DE. If there’s any misfire, rough idle, sluggish take‑off or a noticeable jump in fuel use, bring the change forward and scan for fault codes (P0300–P0306).

The VQ40DE runs coil‑on‑plug, and one bank’s plugs sit under the upper intake plenum, so many techs replace the plenum gaskets at the same time. It’s smart to do all six plugs in one go and inspect coil boots for tracking or cracking. Work on a cold engine, blow out the plug wells before removal, and torque the new plugs to factory spec — most iridium/platinum plugs come pre‑gapped and their plated threads generally don’t need anti‑seize (plug makers advise against it as it alters torque).

• Common signs it’s time: hard starts, rough idle, flat spots, pinging under load, higher fuel use, or stored misfire codes.
• Good practice: use OE‑equivalent long‑life plugs, fit new plenum gaskets if removed, apply a touch of dielectric grease inside boots, and verify gap/torque to the Nissan spec.

If the Pathfinder is the YD25 diesel, spark plugs don’t feature at all — that engine uses glow plugs purely for cold starting, while combustion is triggered by high compression rather than a spark.

Popular questions about 2008 Nissan Pathfinder spark plugs

Do all 2008 Pathfinders have spark plugs?
Not all of them. The 4.0‑litre VQ40DE petrol V6 has six spark plugs. The 2.5‑litre YD25DDTi turbo‑diesel doesn’t use spark plugs, it uses glow plugs and compression ignition. Checking the compliance plate or engine code will confirm which type is fitted.

How often should spark plugs be changed on the V6?
With long‑life iridium/platinum plugs, many schedules land around 100,000–160,000 km, but always follow the Nissan handbook for your market. If there are signs of misfire, rough running or poor economy, inspect and replace sooner and rule out coil or intake issues at the same time.

What gap and torque should be used?
Use the Nissan specification shown in the Owner’s Handbook or under‑bonnet label for the VQ40DE. Many VQ40DE plugs are pre‑gapped around 1.1 mm and should be torqued to the factory value. Avoid anti‑seize on plated, long‑life plugs unless the plug maker explicitly calls for it, it can lead to over‑tightening.