Parts for your 2017 Nissan Navara-Spark plugs

2017 Nissan Navara spark-plugs — are they used?

For the 2017 Nissan Navara sold in Australia and New Zealand (D23/NP300 series), spark plugs aren’t fitted or required. This model year is powered primarily by Nissan’s 2.3‑litre common‑rail turbo‑diesel engines (YS23DDT and YS23DDTT). Diesel engines use compression ignition rather than spark ignition, so there are no spark plugs to service. This is confirmed by Nissan’s D23 Navara Service Manual for diesel models and Nissan Australia’s 2017 NP300 specifications, both of which list glow plugs but no spark plugs. General diesel engine references such as the Bosch Automotive Handbook also explain that diesel combustion is initiated by high compression and heat, not a timed spark.

Instead of spark plugs, these Navaras use glow plugs to assist cold starts. Glow plugs preheat the combustion chamber so the fuel ignites cleanly when the engine is cold, particularly on frosty mornings. Once the engine is warm, they’re largely out of the picture. If the Navara is cranking normally but struggles to start from cold, idles roughly for a short period after start-up, or puffs white smoke initially, the workshop will typically test the glow plugs, the glow plug control module, and battery/charging health rather than going hunting for non-existent spark plugs.

For owners, that means there’s no spark-plug replacement interval to plan for on a 2017 diesel Navara. Routine servicing focuses on diesel essentials: high-quality fuel, timely fuel filter changes, correct engine oil spec and intervals, and keeping the intake/EGR/DPF systems healthy. Glow plugs are usually “inspect/replace on condition” items—many last well past 150,000 km—but they can fail individually. A technician can check resistance and current draw to confirm. If a 2017 Navara in this market happens to be a rare petrol variant (uncommon locally), that engine would use spark plugs and follow its own replacement schedule outlined in its petrol-specific service documentation, however, for the mainstream AU/NZ diesel models, spark plugs simply aren’t part of the vehicle.

• Technical references: Nissan D23 Navara Service Manual (Diesel), Nissan Australia 2017 NP300 specifications, Bosch Automotive Handbook (Diesel ignition principles).

FAQs

Does a 2017 Nissan Navara have spark plugs?
No. The 2017 Navara in Australia and New Zealand is a diesel (D23/NP300), which uses compression ignition and glow plugs, not spark plugs. Glow plugs preheat the chambers for easier cold starts and aren’t a routine replacement like spark plugs in a petrol engine.

What replaces spark plugs on a diesel Navara?
Glow plugs do the cold-start assisting. If cold starts are rough or there’s white smoke on start-up, a workshop will test the glow plugs and their control system. There’s no fixed interval—replace on condition if testing shows a fault.

My 2017 Navara is hard to start—could it be the spark plugs?
It won’t be spark plugs, because there aren’t any. Common culprits on these diesels are weak glow plugs, a tired battery, low cranking speed, or fuel system issues. A quick diagnostic check of glow plugs, battery/charging and fuel filter condition usually pinpoints the cause.