Parts for your 2021 Mitsubishi Asx-Maf sensor

2021 Mitsubishi ASX MAF Sensor

Technical references confirm the 2021 Mitsubishi ASX (GA2W, 2.0L 4B11 petrol) uses a Mass Air Flow (MAF) sensor. The Mitsubishi ASA electronic parts catalogue lists a “Sensor, Mass Air Flow” for this model (commonly referenced as p/n 1588A060, Denso type). The factory ASX/RVR/Outlander Sport Workshop Manual includes MAF-related diagnostics and DTCs (P0100–P0104). Major aftermarket catalogues in AU/NZ also list direct-fit MAF sensors for 2010–2022 ASX 2.0L. So yes—the 2021 ASX is fitted with a MAF sensor.

The MAF sensor on a 2021 Mitsubishi ASX keeps the engine running sweet by measuring how much air is flowing into the intake. The ECU uses that live airflow figure (grams per second) to sort out fuelling and ignition timing, which helps with smooth cold starts, decent power, good fuel economy, and low emissions. It also works alongside the intake air temp and manifold pressure data to keep things tidy when the aircon kicks in or the weather turns.

There’s no strict replacement interval for the MAF on the ASX, but it’s smart to give it a health check during regular servicing. If the air filter has been left too long, or an oiled aftermarket filter has been used, the hot-film element can get grubby. Common signs the MAF needs attention include rough idle, hesitation or flat spots, poor fuel economy, black smoke, or the check-engine light with codes like P0101–P0104. Keep in mind, vacuum leaks or a blocked air filter can mimic a flaky MAF, so a quick look over the intake and hoses is worth it.

Cleaning is often all that’s needed. Pop the plug off, remove the two fixing screws, and lift the sensor out of the duct between the airbox and the throttle body. Only use a proper MAF cleaner spray—don’t touch the sensing element, don’t use carb/brake cleaner, and don’t blast it with compressed air. Let it dry fully before refitting. Many owners clean theirs every 30,000–40,000 km, or sooner if driving in dusty conditions.

If cleaning doesn’t sort the issue and scan data still looks off, replace the sensor with a quality unit. Fit a fresh O-ring if supplied, seat it squarely, clear fault codes, and take it for a drive so fuel trims can relearn. If unsure, a trusted technician can check live data and rule out intake leaks or other gremlins. It’s a straightforward job for a competent home mechanic, and it can make a noticeable difference to how the ASX drives.

Popular questions

Where is the MAF sensor on a 2021 Mitsubishi ASX?
The MAF sits in the intake duct just after the air filter box, before the throttle body. It’s a small black sensor with a single electrical connector and two mounting screws. Easy to spot once the engine cover is out of the way.

How often should the MAF be cleaned or replaced?
There’s no fixed schedule, but a clean every 30,000–40,000 kilometres is a good rule of thumb, especially if driving in dusty conditions. Replace it only if cleaning doesn’t restore normal readings or drivability, or if fault codes keep returning.

Is it safe to drive with a faulty MAF sensor?
The car will usually run, but it may use more fuel, feel sluggish, or surge. Prolonged driving with a dodgy MAF can stress the catalytic converter and isn’t ideal. Best to address it promptly—clean, test, or replace as needed.