Mitsubishi eK: common problems, service schedule and fuel economy
What typically goes wrong on the Mitsubishi eK, 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
- 2013–present
- Generations
- 2
- Engines
- 5
- Verified faults
- 5
B3xW (eK Wagon / eK X / eK Space, BR06, ProPilot) · 2019–present
0.66 BR06 (naturally aspirated) · 52 hp · 0.66 BR06 + mild hybrid · 52 hp · 0.66 BR06 turbo · 64 hp
Known problems
- Worth watching usually from 31,000 mi (50,000 km)
Kei CVT sensitivity to heat and old fluid
Symptoms: shudder or slip under load, whining or delayed engagement if the CVT fluid is neglected, most likely on the turbo when worked hard
What to do: Change the CVT fluid on time and earlier under heavy city use or hot climates; treat any shudder or whine as an early signal to service the transmission. Fresh fluid is the key to CVT longevity on these kei cars.
- Good to know usually from 0 mi (0 km)
Mild-hybrid 12V and drive-belt dependence
Symptoms: stop-start and mild-hybrid assist behaving oddly, or the engine slow to restart, if the small lithium-ion sub-battery or the belt-driven starter-generator is worn
What to do: Keep the 12V and hybrid sub-battery healthy and the accessory/starter-generator belt in good condition; have unusual stop-start behaviour scanned at a dealer. This is a gentle mild-hybrid assist, not a full hybrid, so issues are usually electrical rather than drivetrain.
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 | shorten to ~7,500 km for short-trip city use |
| Air filter | every 19,000 mi (30,000 km) | — |
| CVT fluid (Jatco kei CVT) important | every 25,000 mi (40,000 km) | service earlier in hot climates or heavy city use |
| Spark plugs (petrol) | every 37,000 mi (60,000 km) | shorter on the turbo |
| 12V / hybrid sub-battery check | every 24 months | the mild-hybrid system uses a small lithium-ion battery and a belt-driven starter-generator; keep the 12V and drive belt healthy |
| Brake fluid important | every 24 months | — |
B11W (eK Wagon / eK Custom / eK Space, NMKV) · 2013–2019
0.66 3B20 (naturally aspirated) · 49 hp · 0.66 3B20 turbo · 64 hp
Known problems
- Worth watching usually from 37,000 mi (60,000 km)
CVT wear if fluid is neglected
Symptoms: shudder or slip under load, whining or delayed engagement as the CVT ages without regular fluid changes
What to do: Change the CVT fluid on schedule and avoid sustained heavy load with old fluid; address any shudder early. On these early kei CVTs, neglected fluid is the usual cause of trouble.
- Worth watching usually from 62,000 mi (100,000 km)
3B20 valve-cover o-ring hardening (oil in spark-plug wells)
Symptoms: oil or grease seeping into the spark-plug wells from a hardened valve-cover seal, which can cause misfires if it reaches the plugs or coils
What to do: If the engine misfires or you find oil in the plug wells, replace the valve-cover gasket and o-rings and clean the wells. It is a known, straightforward repair on this engine at higher mileage.
- Worth watching usually from 75,000 mi (120,000 km)
Cooling-system neglect, high-mileage oil use and chain stretch
Symptoms: overheating and possible head damage if the cooling system is run low or dirty; slight oil consumption and timing-chain stretch appearing past roughly 150,000 km
What to do: Keep the coolant clean and topped up and never ignore an overheating event, as the aluminium head does not tolerate it well. Watch oil level and listen for a cold-start chain rattle at high mileage.
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 | kei three-cylinder — shorten to ~7,500 km for short-trip city use |
| Air filter | every 19,000 mi (30,000 km) | — |
| CVT fluid important | every 25,000 mi (40,000 km) | the small kei CVT dislikes heat and old fluid; service earlier under heavy use |
| Spark plugs (petrol) | every 37,000 mi (60,000 km) | shorter on the turbo |
| Valve clearance / timing chain check | every 62,000 mi (100,000 km) | the 3B20 benefits from a periodic valve-clearance check at high mileage; chain-driven, no belt |
| Brake fluid important | every 24 months | — |
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 eK problems?
The faults reported most often are: CVT wear if fluid is neglected; 3B20 valve-cover o-ring hardening (oil in spark-plug wells); Cooling-system neglect, high-mileage oil use and chain stretch. Symptoms, the mileage each appears at and what to do about it are all above.
How often does the Mitsubishi eK 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.