Parts for your 2004 Nissan Navara-Knock sensor

2004 Nissan Navara knock sensor — does it have one, what it does, and when to replace it

Based on technical references, whether a 2004 Nissan Navara uses a knock sensor depends on the engine fitted. The Nissan D22 Workshop Manual (Engine Control sections) details a knock sensor and related DTC P0325 for the petrol KA24DE 2.4 and VG33E 3.3 engines, and the Nissan FAST electronic parts catalogue lists a knock sensor (commonly under P/N family 22060-30P0x) for those petrol variants. The same factory references for the 2004 YD25DDTi diesel do not list or diagram a knock sensor, nor a knock-control strategy, confirming it isn’t used on that diesel. Independent data sources (dealer diagnostics/CONSULT and Autodata) also show knock-sensor monitoring for the petrol ECUs and no such circuit for the YD25DDTi.

Why no knock sensor on the diesel? The YD25DDTi is a compression-ignition engine, it manages combustion via injection timing, rail pressure and mapped strategies rather than spark timing. Traditional piezo knock sensing (used to pull back ignition timing on petrol engines) isn’t required on this 2004 diesel layout, so Nissan didn’t fit one.

For 2004 Navara petrol models that do have a knock sensor, it’s a small piezo unit bolted to the engine block that “listens” for detonation (pinging). The ECU uses that signal to gently trim ignition timing so the ute runs sweet as in Aussie and Kiwi conditions, giving better driveability, decent fuel economy and protecting the pistons and bearings from knock damage. On the KA24DE it’s mounted on the block below the intake side, on the VG33E it sits in the valley under the upper intake—harder to reach but vital for keeping the V6 happy.

It’s not a routine replacement item, but it deserves attention during major servicing—especially if the intake is off on a VG33E. Typical clues it’s crook include a check engine light with code P0325, sluggish performance, higher fuel use, or the ECU feeling “flat” because it’s playing it safe with timing. Before swapping it, a good tech will check the sub-harness and connector (they can go brittle or oil-soaked), ensure correct routing away from exhaust heat, and verify the circuit against the workshop manual. If replacement’s needed, use quality OEM-spec parts, fit it to a clean, dry mating surface, and torque it to spec—over-tightening can make it deaf, under-tightening can make it chatty. Once fitted, clear the code and perform an idle/ECU relearn so timing control comes back online. For best results, run decent fuel and keep on top of carbon build-up—less knock to manage means the ECU can keep timing optimised and the Navara feels perky on the open road.

Where is the knock sensor on a 2004 Navara petrol?

On the KA24DE 2.4, it’s bolted to the block on the intake side, roughly mid-block. On the VG33E 3.3 V6, it’s tucked in the valley below the upper intake manifold. Access on the V6 usually means removing the upper manifold, so many owners tackle it during other intake or cooling jobs.

What are the symptoms of a faulty knock sensor?

Common signs are a check engine light (often P0325), flat or hesitant acceleration, and higher fuel use. The ECU may pull timing to protect the engine, so it can feel down on power even without obvious pinging. Always check the wiring and connector, as they’re frequent culprits.

Do 2004 Navara diesels have a knock sensor?

No. The YD25DDTi diesel doesn’t use a traditional knock sensor. It controls combustion via injection timing and fuel pressure mapping, so there’s no knock-sensor circuit or corresponding fault code on that engine family for this model year.