Parts for your 2013 Nissan Pathfinder-Knock sensor

2013 Nissan Pathfinder knock sensor — what it does and when to replace it

Yes, the 2013 Nissan Pathfinder uses a knock sensor. Technical documentation backs this up: the 2013 Pathfinder (R52) Factory Service Manual, Engine Control (EC) section, details the Knock Sensor (KS) circuit and related diagnostic trouble codes P0325, P0326, P0327 and P0328. Nissan’s OBD-II diagnostic charts for the VQ35DE V6 used in 2013 also reference these knock sensor codes. So, it’s very much a fitted and active part on this model.

The knock sensor’s job is to “listen” for engine knock (pinging/detonation) and tell the ECU to adjust ignition timing before damage occurs. That means better protection for the alloy V6 under load, smoother performance, cleaner emissions, and improved fuel efficiency across Aussie and Kiwi conditions, whether it’s running regular 91 RON or premium fuel. When the sensor hears knock, timing is pulled back, when things are quiet, the ECU lets timing advance for more pep.

It isn’t a scheduled-service item, but age, heat and vibration can take a toll. Common signs of trouble are a Check Engine Light with one of the KS codes above, noticeable loss of power (the ECU goes conservative), rough running, or increased fuel use. Wiring issues in the valley under the intake, connector corrosion, or an internal sensor fault are typical culprits.

On the 2013 Pathfinder VQ35DE, the knock sensor lives on the engine block in the “V” under the intake manifold. Replacement is a bit of a mission compared with a basic service because the upper intake has to come off. A competent tech will typically:

• Disconnect the battery and relieve fuel system pressure.
• Remove the engine cover and upper intake/collector, replacing gaskets on reassembly.
• Inspect the harness, fit a quality OEM or OE-equivalent sensor, and torque to factory spec.
• Reassemble, clear fault codes, and road test under load to confirm no pinging and stable timing.

Tips for owners: don’t ignore a CEL for knock sensor codes, prolonged timing retard will make it feel gutless and drink more fuel. Use reputable fuel, keep up with cooling system maintenance to avoid heat stress, and if the plenum is off for other work, it’s smart to inspect the KS harness while access is easy.

Popular questions

Where is the knock sensor on a 2013 Pathfinder?
It’s mounted on the engine block in the valley beneath the intake manifold on the VQ35DE V6. Access requires removing the upper intake/collector, so it’s not a quick driveway job for most people.

Is it safe to drive with a bad knock sensor?
The ECU will usually pull timing to protect the engine, so it can be driven short-term, but performance and economy suffer. If real detonation occurs and the sensor can’t report it correctly, engine damage is possible. Best to sort it promptly.

How much does replacement cost in Australia or New Zealand?
Expect roughly 1.5–3.0 hours labour depending on workshop and access, plus parts. A quality sensor is often $100–$250, with intake gaskets extra. All up, many owners see $350–$800, varying by region and parts choice.