Parts for your 2007 Honda Stream-Knock sensor

2007 Honda Stream knock sensor – what it does and when to replace it

Yes, the 2007 Honda Stream is fitted with a knock sensor. Honda factory service information for the RN6–RN9 Stream (R18A 1.8 and R20A 2.0 engines) lists a knock sensor threaded into the cylinder block beneath the intake manifold, and Honda’s OBD-II diagnostics include knock-sensor fault codes (P0325 range) for these engines. Honda’s parts catalogues also show a dedicated knock sensor and harness for these models. So it’s very much a relevant component on this vehicle.

The knock sensor’s job is to “listen” for knock (detonation) and let the engine control unit trim ignition timing and fuelling on the fly. That protects the alloy engine from damage under load, helps it run happily on everyday 91–95 RON petrol found across Australia and New Zealand, and keeps emissions and fuel use in check. On the Stream’s R-series engines, that fine control is a big part of their smooth, low-down torque and reliability.

There’s no scheduled maintenance for the knock sensor, but it’s smart to check its connector and loom for oil contamination, heat hardening, or chafing during regular servicing. If replacement is needed, use an OEM-spec sensor and a new sealing washer. Access is typically under the intake manifold on the block near cylinders 2–3. Disconnect the battery, unplug the sensor, remove it with a deep socket, then install and tighten to the correct torque. For Honda R-series engines, the common spec is 22 N·m (about 16 lb·ft). Overtightening can crush the piezo element, undertightening can cause poor signal and false knock readings. Clear any fault codes and road-test with a scan tool to confirm knock counts and timing advance look healthy.

• Typical symptoms of a failing sensor: Check Engine light (P0325 etc.), rattly “ping” under load, lazy acceleration, and increased fuel use.
• Before condemning the sensor, rule out poor-quality fuel, intake leaks, or wiring faults, these can trigger the same codes.

If the Stream’s showing those signs, fitting a quality replacement and setting the correct torque usually restores crisp performance and keeps the engine safe under the bonnet for the long run.

Popular questions about the 2007 Honda Stream knock sensor

Where is the knock sensor located on a 2007 Honda Stream?
It’s screwed into the engine block beneath the intake manifold, generally around cylinders two and three. Most techs access it from above with the intake ducting removed, or from the wheel well with the liner out for extra room. A deep socket helps reach it cleanly.

What fault codes point to a bad knock sensor on a Stream?
Common codes are P0325 (Knock Sensor Circuit Malfunction) and related variants. Always inspect the connector and wiring first, as heat and oil can cause intermittent faults. If the loom checks out and live data shows no signal, the sensor itself is likely due.

What torque should the knock sensor be tightened to?
22 N·m is the typical Honda spec for the R18A/R20A knock sensor. Getting this right matters: too tight can damage the sensor, too loose can lead to unreliable detection and timing pull. Use a torque wrench and a new sealing washer.