Parts for your 2015 Nissan Pulsar-Spark plugs

2015 Nissan Pulsar spark plugs: what they do and when to replace them

Spark plugs are absolutely relevant and fitted to the 2015 Nissan Pulsar (C12) with its petrol engines, including the 1.8‑litre MR18DE and the 1.6‑litre turbo MR16DDT. This is confirmed in Nissan’s 2015 Pulsar Owner’s Manual and Maintenance Schedule for AU/NZ, the Nissan Electronic Service Manual (ESM) for the MR-series engines, and major spark plug manufacturer catalogues that list specific iridium plugs for this model.

On this Pulsar, each cylinder has a coil-on-plug ignition setup. The spark plug sits under the engine cover, threaded into the head, where it creates the spark that ignites the air–fuel mix. Good plugs help the engine start crisply on cold mornings, idle smoothly in city traffic, pull strongly on the highway, and keep fuel use and emissions in check. Worn plugs can cause hard starting, misfires, rough running under load, higher fuel consumption, and that annoying check engine light.

For routine servicing, owners should plan on iridium spark plugs and a long replacement interval. As a rule of thumb for AU/NZ conditions, the 1.8‑litre naturally aspirated Pulsar is typically on a 90,000–120,000 km interval, while the 1.6‑litre turbo may need them a bit sooner (around 60,000–80,000 km), especially if it sees lots of short trips, stop–start commuting, or spirited driving. Always confirm the exact interval and spec in the vehicle’s service schedule and under-bonnet emission/ignition labels.

When replacing, stick with the correct iridium grade and heat range called up by Nissan for the specific engine. Modern iridium plugs are usually pre‑gapped, avoid forcing the gap wider or narrower. Fit them to the proper torque with a torque wrench to protect the alloy head, and replace all plugs as a full set. While you’re there, inspect the coil boots and seals, and clear any debris from the plug wells so nothing falls into the cylinder.

Drivers can keep an eye out for these tell‑tales between services:

• Rough idle, sluggish acceleration, or a stumble under load
• Higher fuel use and a richer exhaust smell
• Hard starting, especially cold, or a flashing MIL for misfire

Technical sources: Nissan Pulsar (C12) Owner’s Manual and Maintenance Schedule (2015 AU/NZ), Nissan Electronic Service Manual for MR18DE/MR16DDT, NGK and Denso application catalogues listing iridium spark plugs for the 2015 Pulsar.

Popular questions about 2015 Nissan Pulsar spark plugs

What spark plugs does a 2015 Nissan Pulsar use?
The 2015 Pulsar specifies iridium spark plugs matched to the engine variant. The 1.8‑litre MR18DE and 1.6‑litre MR16DDT turbo each require a specific heat range and design. Check the owner’s handbook or a reputable parts catalogue using the VIN to ensure the correct part number, and avoid “universal” copper substitutes.

How often should spark plugs be replaced on this model?
For typical Australian and New Zealand driving, expect about 90,000–120,000 km for the 1.8‑litre and roughly 60,000–80,000 km for the 1.6‑litre turbo. High‑load or short‑trip use can shorten those intervals. If in doubt, follow the Nissan maintenance schedule for your VIN and driving conditions.

What are the signs the plugs need attention?
Tell‑tales include rough idle, misfires under load, harder cold starts, lower fuel economy, or a check engine light with misfire codes. If any of these pop up, a plug and coil inspection under the bonnet is a smart first step.