Parts for your 2019 Mitsubishi Outlander-Knock sensor

2019 Mitsubishi Outlander knock sensor — what it is, why it matters, and when to sort it out

Based on Mitsubishi’s factory workshop information for the 2016–2020 Outlander range (Engine/ECU sections) and the Mitsubishi ASA electronic parts catalogue, all 2019 Outlander petrol engines (2.0L 4B11, 2.4L 4B12 and, where fitted, 3.0L V6) are equipped with a knock sensor. These sources also document related OBD-II fault codes such as P0325, P0326, P0327 and P0330. The 2.2L turbo-diesel variant does not typically use a conventional knock sensor, relying instead on different combustion monitoring strategies. So, for most Aussie and Kiwi owners with a petrol 2019 Outlander, the knock sensor is very much relevant.

On the petrol Outlander, the knock sensor is a small, bolt-on microphone of sorts that listens for pinging (detonation) in the engine block. When it hears knock, it signals the ECU to gently pull back ignition timing and protect the engine. That means smoother running on our variable local fuels, better reliability under load, and the best balance of performance and economy whether you’re commuting or towing the trailer to the bach.

It’s not a routine service item, but if the check engine light pops up with a knock-sensor code—or you notice rattly pinging under acceleration, sluggish performance, or poor fuel economy—it’s time to investigate. Before blaming the sensor, rule out basics: poor-quality fuel, carbon build-up, vacuum leaks, or wiring damage can all cause similar dramas.

Replacement is straightforward for a competent DIYer, but most owners are happier leaving it to a technician because correct torque and clean mounting are critical for accurate listening. Typical steps include disconnecting the battery, accessing the sensor on the block, removing a single retaining bolt, cleaning the seating surface, installing the new sensor to factory torque, and routing the harness away from heat and sharp edges. After refit, clear any codes and road-test to allow the ECU to relearn. Always use a quality, engine-specific sensor—generic units can misread vibration and cause false timing pulls.

Good habits help the knock sensor help you: run the recommended RON for your engine, keep up with oil and cooling-system maintenance, and fix any exhaust leaks or mount issues that can introduce odd vibrations. Treated right, the sensor can go the distance for many hundreds of thousands of kilometres without fuss.

Does a 2019 Mitsubishi Outlander have a knock sensor?

Yes—on petrol models (2.0L, 2.4L and some V6s). Mitsubishi’s service manuals and parts catalogues list a knock sensor for these engines. The 2.2L diesel typically doesn’t use a traditional knock sensor.

What are the symptoms of a bad knock sensor, and can it be driven?

Common signs include a check engine light (P0325/P0327/P0330), pinging under load, flat performance, and higher fuel use. You can usually drive short-term, but the ECU may pull timing and power. Sort it promptly to protect the engine.

Where is the knock sensor on a 2019 Outlander, and is DIY replacement realistic?

It’s bolted to the engine block, typically beneath the intake side on the four-cylinder. DIY is possible with basic tools and a torque wrench, but access can be tight. If unsure, get a qualified tech to do the job and run post-repair diagnostics.