Parts for your 2015 Nissan Navara-Knock sensor

2015 Nissan Navara knock sensor — is it actually a thing?

Short answer: on most 2015 Nissan Navara models sold in Australia and New Zealand (D23/NP300 with the 2.3‑litre YS23DDT or YS23DDTT turbo‑diesel), there isn’t a traditional knock sensor fitted. This isn’t a guess — it lines up with the Nissan D23 Series Service Manual for the YS23 engines (Engine Control “EC” section: component list and ECM inputs/outputs show no knock sensor), as well as common parts catalogues for the diesel NP300 that don’t list a knock sensor for YS23 variants. By contrast, the QR25DE 2.5‑litre petrol Navara (offered in some markets) does use a knock sensor, which is documented in the same D23 Service Manual EC section for QR25DE and its diagnostic trouble codes (e.g., P0325/P0327).

Why the difference? Diesel combustion is controlled by injection timing and pressure rather than spark. The characteristic “diesel knock” is part of normal operation, so a spark‑ignition style knock sensor isn’t required for the YS23. The diesel ECM manages combustion using inputs like crank and cam sensors, MAF/MAP, coolant and intake air temperature, fuel rail pressure and exhaust‑aftertreatment sensors, not a block‑mounted knock sensor. That’s why you won’t find one on the YS23 engine diagrams in the Nissan manual or in diesel parts listings.

If someone’s chasing a “knock sensor” fault on a 2015 diesel Navara, odds are a generic scan tool has translated a code using a petrol lookup. Double‑check the engine type first. For the YS23 diesel, rough running or rattle complaints are more commonly tied to injector calibration, fuel quality, timing chain noise, dual‑mass flywheel chatter or accessory pulleys — not a missing knock sensor.

• Have a 2015 Navara petrol (QR25DE)? That one does have a knock sensor on the block, and the ECM uses it to trim ignition timing under load.
• Have a 2015 Navara diesel (YS23)? No knock sensor by design, look to fuel, air and timing systems for drivability or noise diagnostics.

Technical sources referenced: Nissan Navara D23/NP300 Series Service Manual — Engine Control (EC) sections for YS23DDT/YS23DDTT and QR25DE, Nissan parts catalogues for D23 diesel vs petrol component listings, professional data services (e.g., workshop information systems) that enumerate ECM inputs and component locations for the YS23.

FAQs

Does a 2015 diesel Navara have a knock sensor?
For the YS23DDT/DDTT 2.3‑litre turbo‑diesel, no. The factory service manual’s engine control component list and ECM input mapping do not include a knock sensor. Combustion control is managed via injection timing, rail pressure, boost and EGR.

Where is the knock sensor on a 2015 Navara petrol?
On QR25DE petrol models, the knock sensor is mounted to the engine block and monitored by the ECM to adjust ignition timing under load and prevent detonation. If you’re not certain which engine you have, check the VIN/engine label or your build plate.

My scan tool shows a knock sensor code on a 2015 diesel Navara — what gives?
Generic scan tools sometimes map petrol‑only codes to diesel models. If your YS23 diesel flags a “knock sensor” code, confirm the engine type and use manufacturer‑specific data. Investigate diesel‑relevant causes like injector performance, air leaks, fuel pressure issues or timing chain noise instead.