Parts for your 2025 Mitsubishi Asx-Knock sensor

2025 Mitsubishi ASX knock sensor — what it does and how to look after it

Yes, the 2025 Mitsubishi ASX is fitted with a knock sensor. This is supported by technical sources: the Mitsubishi ASX/RVR workshop manuals and ASA electronic parts catalogue list a “knock sensor” for the 2.0-litre MIVEC petrol used in AU/NZ models, and the European 2025 ASX (the Captur-based model) uses Renault CMF‑B petrol and hybrid engines (H5Ht 1.3 TCe, HR10 1.0 TCe, and the HR16-based hybrid), all of which include knock sensing per Renault technical documentation. In short, whether it’s the Aussie/NZ 2.0-litre or the Euro TCe/hybrid lineup, a knock sensor is part of the engine management hardware.

On the 2025 Mitsubishi ASX, the knock sensor’s job is to “listen” for abnormal combustion (knock/ping) and tell the ECU to tweak ignition timing and, if needed, fuelling. That protects pistons and bearings, smooths performance, helps fuel economy, and keeps emissions tidy. It’s especially handy in hot weather, under load, or when lower-octane fuel is used.

There’s no scheduled maintenance just for the knock sensor, but it’s smart to keep an eye on related basics during regular servicing:

• Watch for symptoms: check engine light (common DTCs include P0325–P0334), rattly “ping” under load, flat performance, or higher fuel use.
• Inspect the harness and connector when you’re in the bay — heat, oil, or coolant can harden insulation or cause green crusty terminals.
• If the sensor’s removed, always refit at the torque specified in the workshop manual. Over‑ or under‑tightening can make it deaf or too sensitive.
• Use quality, correct‑spec parts. The sensor’s frequency response is tuned to the engine, generic bits can cause nuisance codes or timing pull.

Replacement is straightforward for a trained tech: battery disconnect, access the sensor on the engine block (typically mid‑block under the intake side on the 2.0 MIVEC, block-mounted near cylinder two on the TCe), clean the seat, torque to spec, clear codes, and perform any required idle/ECU relearn. There’s usually no need to replace it proactively, swap it when there’s a confirmed fault, damage, or if it’s oil‑soaked from a leak.

For everyday driving, stick to the fuel grade recommended on the ASX’s fuel flap/owner’s manual, keep software up to date, and address any intake leaks or carbon buildup that can promote real knock. Do that, and the knock sensor can quietly get on with protecting the engine while you get on with the drive.

Popular questions

Does the 2025 Mitsubishi ASX definitely have a knock sensor?
Yes. Mitsubishi service information and parts catalogues for the AU/NZ 2.0‑litre MIVEC list a knock sensor, and the European Captur‑based 2025 ASX engines (1.0/1.3 TCe and hybrid) are documented with knock sensors in Renault technical manuals. It’s standard modern engine kit.

Where is the knock sensor on a 2025 ASX?
On the AU/NZ 2.0‑litre MIVEC, it’s typically bolted to the engine block under the intake manifold area, roughly mid‑block. On the CMF‑B petrols (1.0/1.3 TCe), expect a block‑mounted location near the centre cylinders. Hybrids still have a block‑mounted sensor on the petrol engine. Exact access varies by engine and trim.

Is it safe to drive with a knock sensor fault?
The ECU usually dials back ignition timing to protect the engine, so it may feel down on power and burn more fuel. While it’ll generally limp along, it’s best to get it checked promptly — prolonged driving with an inoperative sensor could mask genuine knock and risk engine damage.