Mitsubishi ASX: common problems, service schedule and fuel economy
What typically goes wrong on the Mitsubishi ASX, at what mileage, and what keeping it right involves — from Brimly's Vehicle Knowledge Base, where every fault is checked by a human before publication.
- Years
- 2010–2023
- Generations
- 1
- Engines
- 3
- Verified faults
- 4
GA (1st gen) · 2010–2023
1.6 MIVEC · 117 hp · 1.8 DI-D · 150 hp · 2.0 MIVEC · 150 hp
Known problems
- Worth watching
Weak air conditioning
Symptoms: cooling that struggles in hot weather; some cars need condenser or compressor attention
What to do: If cooling weakens, have the A/C leak-tested and the condenser/compressor checked; keep the condenser clear of debris.
- Worth watching usually from 75,000 mi (120,000 km)
Jatco CVT wear and overheating
Symptoms: shudder, whine, delayed or jerky engagement and overheating in heavy traffic, mainly on the 2.0 CVT cars at higher mileage
What to do: Change the CVT fluid ahead of the maker's interval (~45,000 km), avoid overheating the box in traffic, and have any shudder or slip inspected early. A well-serviced CVT lasts much longer than a neglected one.
- Worth watching usually from 93,000 mi (150,000 km)
Timing-chain stretch (4B11)
Symptoms: rattle in the first seconds after a cold start; on a badly stretched chain, rough idle and a timing fault code
What to do: Keep oil fresh and topped up — chain stretch here tracks neglected oil. If you hear a cold-start rattle, have the chain, tensioner and guides checked instead of ignoring it.
- Good to know
Thin paint and localised corrosion
Symptoms: paint chips easily and, in salted-road climates, rust can start at the wheel arches, lower doors and underbody
What to do: Touch up stone chips promptly and treat the underbody for winter; inspect arches and sills on an older car.
Service schedule
| Item | Interval | Notes |
|---|---|---|
| Cabin filter | every 9,000 mi (15,000 km) | — |
| Engine oil & filter change | every 9,000 mi (15,000 km) or 12 months | halve to ~7,500 km for short-trip/city or severe use; on the diesel keep to the correct low-ash oil |
| Air filter | every 19,000 mi (30,000 km) | — |
| CVT fluid (Jatco) important | every 28,000 mi (45,000 km) | CVT cars — service earlier than the long factory interval; manual (5MT) cars are unaffected |
| Spark plugs | every 37,000 mi (60,000 km) | petrol engines; iridium |
| Brake fluid important | every 24 months | — |
| Timing chain (no belt) | — | chain-driven on both petrol and the 1.8 diesel — investigate any cold-start rattle |
Manufacturer-declared fuel economy
No manufacturer-declared figures for this model are in the Knowledge Base yet. A figure without the cycle it was measured under is not comparable to anything, so we publish none rather than a number you cannot interpret.
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Frequently asked
What are the most common Mitsubishi ASX problems?
The faults reported most often are: Weak air conditioning; Jatco CVT wear and overheating; Timing-chain stretch (4B11). Symptoms, the mileage each appears at and what to do about it are all above.
How often does the Mitsubishi ASX need servicing?
Engine oil & filter change — every 9,000 mi (15,000 km) or 12 months. The full published schedule is above; your car's own service book always takes precedence.
Where does this data come from?
Brimly's Vehicle Knowledge Base — the same verified facts the app's AI assistant answers from. Every fault is written up from public sources and then checked by a human before it is published; nothing here is generated on the fly.