Parts for your 2004 Nissan Navara-Ignition coils

2004 Nissan Navara ignition coils: are they used?

Based on Nissan technical literature, ignition coils are not used on most 2004 Nissan Navara models sold in Australia and New Zealand because they’re predominantly diesel. The Nissan D22 Factory Service Manuals for the YD25DDTi and ZD30DDTi engines (EC and EM sections) outline compression-ignition systems with glow plugs, rail pressure control and injectors, and no spark-ignition components. Likewise, Nissan’s parts cataloguing for these diesel engines lists glow plugs but no ignition coils. By contrast, the D22 petrol KA24DE manual (EC – Ignition System) details an electronic ignition system with an ignition coil/coil pack, confirming coils are fitted to petrol variants offered in some markets.

So for a 2004 Navara in AU/NZ spec, ignition coils generally aren’t relevant because the engines are diesel. Diesel engines ignite the air–fuel charge through high compression and heat, not a spark. That’s why they use glow plugs for cold starts and high-pressure fuel injection to manage combustion. If the ute is hard to start, idles roughly, or smokes under load, the usual checks are glow plugs, injector condition, fuel filter restriction, air leaks in the fuel lines, or low rail pressure—not ignition coils.

If you’re unsure which engine is under the bonnet, check the build plate or the engine code stamped on the block. YD25 and ZD30 indicate diesel (no ignition coils), KA24 indicates petrol (uses an ignition coil/coil pack). A workshop can also confirm by scanning the ECU—diesel EC sections in the FSM expose no ignition control diagnostics, whereas the petrol manual shows ignition-related DTCs.

• Diesel (YD25DDTi/ZD30DDTi): no ignition coils, uses glow plugs and high-pressure injection.
• Petrol (KA24DE, in some markets): has ignition coil/coil pack and leads as part of the spark-ignition system.

Technical sources referenced: Nissan Navara D22 Factory Service Manuals (2004) for YD25DDTi and ZD30DDTi, EC/EM sections, Nissan D22 KA24DE EC – Ignition System, Nissan FAST parts catalog for D22 engine families.

FAQs

Does my 2004 Nissan Navara have ignition coils?
Most AU/NZ 2004 Navaras are diesel (YD25 or ZD30), which don’t use ignition coils. If yours is the petrol KA24DE variant, it will have an ignition coil/coil pack. Check your engine code on the build plate or registration paperwork to be sure.

What should I check instead of ignition coils on a diesel Navara?
On the diesel, look to glow plugs, injector condition, fuel filter, air leaks in fuel lines, and rail pressure issues. These are the common culprits behind hard starting, rough idle, or loss of power—not ignition components.

Which 2004 Navara engines use ignition coils?
The petrol KA24DE engine (sold in select markets) uses an ignition coil/coil pack per the Nissan D22 petrol service manual. The YD25DDTi and ZD30DDTi diesels do not use coils, as confirmed by their EC/EM sections and parts listings.