Parts for your 2017 Nissan Serena-Knock sensor

2017 Nissan Serena Knock Sensor

Based on Nissan’s technical literature, the 2017 Nissan Serena (C27) is fitted with a knock sensor. The Electronic Service Manual for the C27 (Engine Control/EC section) lists diagnostic items P0327 and P0328 for “Knock Sensor 1 Bank 1,” the CONSULT-III Plus diagnostic guide shows live data for knock sensing, and the Nissan FAST parts catalogue identifies a knock sensor (group 22060) for the MR20DD S-HYBRID and the e-POWER’s HR12 series engine. Those factory sources confirm the knock sensor is relevant and used on this model.

On the 2017 Serena, the knock sensor is the quiet achiever bolted to the engine block under the intake side. Its job is to “listen” for knock (detonation) and let the ECU tweak ignition timing to keep the engine smooth and protect it from damage. Whether it’s the 2.0‑litre MR20DD S‑HYBRID or the e‑POWER range extender engine, that little sensor helps the ECU squeeze good performance and economy out of regular unleaded without risking a rattly, knock-prone burn.

Day to day, the knock sensor is maintenance‑free. During servicing, a quick scan for stored codes (P0327/P0328) and a look at the wiring and connector is plenty. If there’s a fault, the Serena may feel a bit flat because the ECU will play it safe with retarded timing. It can also log a check engine light. Before replacing the sensor, techs should check the harness routing and the block mating surface for corrosion or oil film.

Replacement is straightforward but precise: the sensor needs to be torqued correctly so it “hears” the engine properly. Nissan’s ESM specifies a light torque (around 20 N·m) on a clean, dry mounting pad—no thread tape, sealant, or grease. Over‑tighten it and you can skew readings, under‑tighten and it may miss real knock. Always refit the harness clip so it doesn’t chafe under the bonnet, clear codes with CONSULT, and verify with a short road test under light load hills.

• Common signs to investigate: reduced power under load, pinging sounds not corrected by the ECU, or DTC P0327/P0328.
• Good practice: use quality fuel, keep the cooling system healthy, and don’t ignore a check engine light—knock control is your engine’s insurance policy.

FAQs

Where is the knock sensor on a 2017 Nissan Serena?
It’s mounted on the engine block beneath the intake side, roughly central to the cylinders. Access typically requires removing intake ducting and working from above, on some trims, lifting the intake manifold gives the cleanest access. The wiring pigtail points upward to a clipped harness.

Can the Serena be driven with a bad knock sensor?
It will usually still run, but the ECU dials back ignition advance to protect the engine, which means lazier performance and higher fuel use. Prolonged driving isn’t wise—get the fault scanned, confirm it’s not wiring-related, and replace the sensor if it’s failed.

Does the knock sensor need regular servicing?
No scheduled service is needed. During routine maintenance, a scan for codes and a visual check of the connector and harness is enough. If removal is required for other work, refit with the correct torque on a clean surface to maintain proper sensitivity.