Parts for your 2004 Nissan Serena-Spark plugs

2004 Nissan Serena spark plugs — what’s fitted and how to look after them

Technical reference check: Nissan’s C24 Serena factory service manual and global parts catalogues list spark plugs for the petrol QR-series engines (QR20DE/QR25DE, coil‑on‑plug), while the YD22DDTi 2.2 turbo‑diesel variant lists glow plugs only. So, on a 2004 Nissan Serena, spark plugs are used on petrol models and are not used on the diesel.

For owners of a 2004 Nissan Serena with the petrol QR engine, spark plugs are the small heroes under the bonnet. They ignite the air–fuel mix to kick off combustion, and when they’re in good nick the van starts crisply, idles smoothly, and sips less petrol. The Serena’s coil‑on‑plug setup keeps things tidy and reliable, but plugs still wear over time from heat, pressure, and deposits.

As a rule of thumb, stick with OEM‑spec iridium or platinum plugs listed in the owner’s manual. Iridium designs last longer and hold their gap better, which matters on school runs and long Kiwi or Aussie road trips alike. Many Serena petrol models run iridium plugs with replacement intervals around 100,000 km (or 5–6 years), while basic copper types may need swapping closer to 30,000–40,000 km. Always follow the schedule in the service book and adjust for harsh use like lots of short trips or heavy loads.

Common signs it’s time to sort the plugs include sluggish starts, a rough idle, misfires under load, higher fuel use, or a check‑engine light. If any of that pops up, a quick inspection is smart. Under each coil sits a plug