Parts for your 2007 Holden Commodore-Knock sensor

2007 Holden Commodore knock sensor — fitted, functional, and worth looking after

Based on technical documentation, the 2007 Holden Commodore is fitted with knock sensors. The Holden VE Commodore service manual (Engine Controls, 3.6L V6 and 6.0L V8), GM Global Service Information (GSI) for VE, and mainstream parts catalogues (e.g., ACDelco/GM Genuine Parts and Bosch) all list knock sensors for both the Alloytec 3.6-litre V6 and the L76/L98 6.0-litre V8. These engines use a pair of piezoelectric knock sensors to detect detonation and let the ECU trim ignition timing to protect the engine.

On a 2007 Commodore, the knock sensor’s job is simple but critical: listen for the high-frequency ping of knock and tell the ECU to back off timing just enough to stop it. That keeps performance smooth, fuel economy tidy, and pistons and bearings safe when the fuel quality is iffy, the weather’s scorching, or the engine’s under heavy load. The V6 typically has two sensors mounted in the block valley area under the intake, while the Gen IV V8s use two sensors mounted to the sides of the block.

There’s no regular service interval for knock sensors, but they do benefit from a little attention during routine work:

• When the intake manifold is off (V6) or you’re working near the starter/engine mounts (V8), inspect the sensor bodies and harnesses for heat or oil damage, brittle conduit, and loose connectors.
• Keep the mounting surfaces clean and dry, knock sensors rely on solid contact with the block. Don’t use thread sealant or Teflon on the sensor bolts unless the workshop manual explicitly allows it.
• If replacing, use quality OEM-equivalent parts and tighten to the factory torque spec from the workshop manual. Over- or under-torque can dull sensitivity or cause false knock.

Typical signs of a crook knock sensor include a check engine light with codes like P0325–P0334, flat or sluggish performance (timing heavily retarded), poor fuel economy, or pinging under load because the ECU isn’t getting clean feedback. Before blaming the sensor, rule out poor fuel, vacuum leaks, and a noisy valvetrain. If a sensor is confirmed faulty, replacement on the V6 usually means removing the upper intake to access the valley, on the V8, access is from the sides of the block and may involve working from underneath. A fresh sensor, correct torque, and tidy wiring restore the ECU’s ears — and the Commodore’s easy, reliable grunt.

Popular questions about 2007 Holden Commodore knock sensors

Where is the knock sensor on a 2007 Holden Commodore?
V6 Alloytec models typically have two sensors in the block valley under the intake manifold. The 6.0-litre V8s use two sensors mounted on the sides of the engine block. Access varies: intake-off for most V6 jobs, side/underbody access for the V8.

What are the symptoms of a bad knock sensor on a VE Commodore?
Common signs include a check engine light (codes P0325–P0334), dull performance as timing is pulled back, worse fuel consumption, and sometimes audible pinging under load. Wiring damage or poor mounting contact can mimic sensor failure.

Do knock sensors need regular servicing?
They’re generally maintenance-free, but it’s smart to inspect the sensors and loom whenever the intake is off (V6) or you’re working near the block sides (V8). Clean mating surfaces and correct torque during refit keep the sensor readings accurate.