Nissan Roox: common problems, service schedule and fuel economy
What typically goes wrong on the Nissan Roox, 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
- 2014–present
- Generations
- 2
- Engines
- 4
- Verified faults
- 5
B44A/B45A (NMKV, current) · 2020–present
0.66 BR06 (naturally aspirated) · 52 hp · 0.66 BR06 turbo (Highway Star) · 64 hp
Known problems
- Worth watching usually from 31,000 mi (50,000 km)
Kei CVT sensitivity to heat and old fluid
Symptoms: juddering or slipping on hills fully loaded, 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 in hot climates), and avoid sustained full-throttle climbs with a full load. Treat any shudder or whine as an early signal to service the transmission.
- Worth watching usually from 37,000 mi (60,000 km)
Power sliding-door motor and mechanism failure
Symptoms: an electric sliding door that stops opening or closing automatically, moves unevenly, or has to be worked by hand
What to do: Keep the door rails and rollers clean and lubricated. If a door stops working on its own, have the motor, cable and wiring harness inspected — a common wear repair on tall kei wagons with power doors.
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; use the correct low-viscosity grade for good fuel economy |
| 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; the small kei CVT dislikes heat and old fluid |
| Spark plugs (petrol) | every 37,000 mi (60,000 km) | shorter on the turbo Highway Star |
| Brake fluid important | every 24 months | — |
| Timing chain (no belt) | — | chain-driven — investigate any cold-start rattle |
B21A (Dayz Roox, rebadged Mitsubishi eK Space) · 2014–2020
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)
Kei CVT wear if fluid is neglected
Symptoms: shudder or slip under load, whining or delayed engagement as the CVT ages without fluid changes
What to do: Change the CVT fluid on schedule and avoid sustained heavy load with old fluid; address any shudder early. Fresh fluid is the single best way to make a kei CVT last.
- Worth watching usually from 50,000 mi (80,000 km)
Power sliding-door and electrical-accessory wear
Symptoms: an electric sliding door that stops working automatically, plus reported alternator and air-conditioning-compressor wear on this platform
What to do: Keep the sliding-door rails clean and lubricated and have a failed door's motor and harness checked. Budget for alternator and A/C-compressor wear as the car ages, as these are known weak points on the platform.
- Worth watching usually from 62,000 mi (100,000 km)
3B20 valve-cover o-ring hardening and cooling-system care
Symptoms: oil or grease weeping into the spark-plug wells from a hardened valve-cover seal, and a risk of overheating and head damage if the cooling system is neglected
What to do: Replace the valve-cover gasket/o-rings if oil appears in the plug wells, keep the cooling system clean and topped up, and adjust valve clearances at the recommended high-mileage interval. Watch for slight oil consumption and a stretched chain past ~150,000 km.
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 important | every 25,000 mi (40,000 km) | the small kei CVT needs fresh 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 uses mechanical valve clearances that benefit from a periodic check at high mileage |
| 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 Nissan Roox problems?
The faults reported most often are: Kei CVT wear if fluid is neglected; Power sliding-door and electrical-accessory wear; 3B20 valve-cover o-ring hardening and cooling-system care. Symptoms, the mileage each appears at and what to do about it are all above.
How often does the Nissan Roox 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.