Parts for your 2007 Toyota Aurion-Knock sensor

2007 Toyota Aurion knock sensor — does it have one and what to know

The 2007 Toyota Aurion (GSV40, 3.5‑litre 2GR‑FE V6) is fitted with knock sensors. Technical sources including the Toyota Repair Manual for the GSV40 platform (SFI/Engine Control sections), Toyota wiring diagrams, and factory DTC charts confirm two knock sensors (one per bank) with relevant codes such as P0325 (Bank 1) and P0330 (Bank 2). They’re mounted in the V of the engine, beneath the intake manifold.

On this Aurion, each knock sensor listens for high‑frequency vibration caused by detonation (knock). The ECM uses that signal to trim ignition timing just enough to stop knock without killing performance. That protects pistons, rings and bearings, keeps the engine happy on varying fuel qualities (91–98 RON), and helps maintain smooth power and decent fuel economy on Aussie and Kiwi roads. In short, a healthy knock sensor lets the V6 run as the engineers intended — quick to respond without risking damage when the load goes up or the day gets scorching.

There’s no scheduled replacement interval for the knock sensors, but they deserve attention during intake‑manifold work. Typical red flags include rattly “pinging” under load, sluggish acceleration, heavier fuel use, or the MIL on with codes P0325/P0330. During servicing, a technician may scan live data for knock correction, inspect the sub‑loom and connectors for brittleness or oil intrusion, and check sensor resistance against the factory spec in the manual.

Replacement on a 2007 Aurion is a bit of a mission because the intake has to come off. Most shops recommend genuine or high‑quality equivalent sensors and, if age or heat has got to it, a fresh sub‑loom. Always renew the intake gaskets and follow the factory torque spec and tightening order when refitting. Harness routing matters — keep the leads away from ignition and alternator noise, clip them in the original guides, and don’t over‑bend the pigtails. DIYers should budget time, label hoses and vacuum lines, and work on a cold engine. If the kilometres are up there and one sensor has failed, replacing both while the manifold’s off can save doing the job twice.

• Common symptoms: pinging, poor performance, higher fuel use, MIL with P0325/P0330.
• Best practice: quality sensors, new gaskets, correct torque, proper harness routing.

Popular questions about the 2007 Toyota Aurion knock sensor

Where is the knock sensor on a 2007 Aurion?
It’s under the bonnet in the V of the 2GR‑FE, beneath the upper intake manifold. There are two sensors — one for each cylinder bank — bolted to the block. Access requires removing the intake assembly, so it’s more involved than a simple driveway job.

Can the Aurion be driven with a faulty knock sensor?
It may still run, but the ECM often retards timing to protect the engine, which hurts power and fuel economy. Persistent knock or a dead sensor can risk internal damage, so it’s best to diagnose and fix the issue rather than keep driving.

Do both knock sensors need replacing together?
It’s not mandatory, but many techs replace both while the manifold is off, especially on higher‑kilometre cars. The extra parts cost is usually small compared with the labour to return later and repeat the job on the other bank.