1.8 / 2.0 MIVEC (4B10 / 4B11)
2010–2020 · petrol · 1998cc · 150hp
Engine codes: 4B10, 4B11
Reliability, common problems and owner reviews for the Mitsubishi ASX 1.8 / 2.0 MIVEC (4B10 / 4B11). Check this before you buy used.
The 2.0 4B11 (and 1.8 4B10) is the stronger petrol and a durable engine good for ~300,000+ km — the watch item is timing-chain stretch, which the ECU monitors (triangle warning + rough idle = worn chain). Almost always paired with Mitsubishi's CVT here, so check the gearbox as carefully as the engine: neglected CVT fluid brings shudder and overheating. Engine + healthy CVT = a dependable, long-lived combo.
Same engine, other cars
This is the same physical engine (4B10) sold under different names across brands. Reliability is broadly shared — cross-check these:
Known Issues
Chain stretches on neglect; ECU flags it (triangle light + rough idle); can jump a tooth if ignored.
Fix / Workaround: Strict oil; replace chain kit when flagged/rattling.
Repair cost: €400–€900
Typically appears after: 150,000 km
CVT needs fluid discipline; shudder/overheat and failure if neglected.
Fix / Workaround: Fresh CVT fluid on schedule; avoid sustained heavy load/overheat.
Repair cost: €200–€3000
Typically appears after: 120,000 km
Mileage Thresholds
After 150,000 km: Chain + CVT both matter.
Pre-Purchase Checklist
- ☐Chain-stretch warning / rattle check
- ☐CVT fluid + shudder history
- ☐Test drive for CVT hesitation
Frequently asked questions
Is the Mitsubishi ASX 1.8 / 2.0 MIVEC (4B10 / 4B11) reliable?
Maint. Sensitive — The 2.0 4B11 (and 1.8 4B10) is the stronger petrol and a durable engine good for ~300,000+ km — the watch item is timing-chain stretch, which the ECU monitors (triangle warning + rough idle = worn chain). Almost always paired with Mitsubishi's CVT here, so check the gearbox as carefully as the engine: neglected CVT fluid brings shudder and overheating. Engine + healthy CVT = a dependable, long-lived combo.
What are the common problems and reviews for the Mitsubishi ASX 1.8 / 2.0 MIVEC (4B10 / 4B11)?
The most commonly reported problems: Timing chain stretch, CVT shudder / overheat.
Is a used Mitsubishi ASX 1.8 / 2.0 MIVEC (4B10 / 4B11) worth buying?
Fine if serviced correctly — but it punishes neglect hard. History and the right consumables matter.