Parts for your 2020 Mitsubishi Asx-Drive belt

2020 Mitsubishi ASX drive-belt: what it does and how to look after it

Yes, the 2020 Mitsubishi ASX uses an accessory drive-belt (serpentine belt). This is confirmed by Mitsubishi’s 2020 ASX Owner’s Manual for AU/NZ models (maintenance section lists drive-belt inspections) and the Mitsubishi Workshop/Service Manual for the 4B11 engine (Engine Mechanical – Accessory Drive Belt), which shows the belt, automatic tensioner and routing. Aftermarket technical catalogues from Gates and Dayco also list a V‑ribbed belt for the 2.0‑litre 4B11 ASX, reinforcing that a drive-belt is fitted. Note: the ASX’s 4B11 uses a timing chain internally, but it still relies on an external accessory belt.

On the 2.0‑litre ASX, the drive-belt spins key ancillaries: the alternator, the air‑conditioning compressor and, on this engine, the water pump. Models with electric power steering don’t run a power‑steer pump off the belt. If that belt slips, stretches or fails, you can see battery charging issues, A/C that won’t cool and even engine overheating.

As part of normal servicing, the drive-belt should be visually checked at each service interval (typically every 12 months/15,000 kilometres in AU/NZ schedules) for cracks, fraying, glazing, chunking or missing ribs, and listened to for squeals or chirps on cold start. Many workshops replace the belt preventatively around 90,000–120,000 kilometres or 6–8 years, though actual life depends on heat, dust, short trips and accessory load. The automatic tensioner and idler pulleys should be assessed at the same time, if they’re noisy or rough, replacing them with the belt as a kit is smart insurance.

• Common signs it needs attention: squealing on start‑up, battery/charge warning lamp, A/C not cooling at idle, rising temperature gauge, visible cracks or edge fray.
• Good practice: keep oil and coolant off the belt, use the correct V‑ribbed belt spec for the 4B11, verify rib alignment on all pulleys and follow torque specs for the tensioner.

If the ASX shows charging or cooling issues, a quick belt and tensioner check should be high on the list. A quality replacement belt is inexpensive compared with the headaches of being stranded or overheating.

Popular questions about the 2020 Mitsubishi ASX drive-belt

How often should the drive-belt be replaced?
Most owners will be fine inspecting at every service and replacing somewhere between 90,000 and 120,000 kilometres, or earlier if cracks, glazing or noise show up. Workshop findings and climate matter, hot, dusty use shortens belt life, so a mechanic’s inspection is the best guide.

What are the warning signs of a worn drive-belt?
Squeals on cold start, a battery/charging light, A/C that struggles at idle, the temperature gauge creeping up, or obvious cracks and missing ribs. Any of these are a cue to book in promptly.

Does the 2020 ASX have a timing belt as well?
No. The 2.0‑litre 4B11 uses a timing chain inside the engine. The accessory drive-belt is separate and runs external ancillaries like the alternator, A/C compressor and water pump.