Leapmotor B10 REEV Mk1

A documented case from an Auto Express long-term test showed the B10's onboard charger blowing fuses on multiple different AC charging sources, including home wallboxes, office chargers, and public stations. Activating the 'Safety Current Limiting' function did not resolve the problem. Leapmotor confirmed the car needed a new onboard charger. While this appears to be an isolated manufacturing defect rather than a design-wide issue, the limited ownership data available makes it difficult to quantify how common it is. Replacement is covered under the 6-year warranty if still within coverage.

Multiple reviews and owner reports describe the lane-keeping assist as overly aggressive, especially on country roads and narrow lanes. The system has been documented to suddenly and sharply steer the car toward hazards rather than gently alerting the driver. Leapmotor has acknowledged this issue and rolled out OTA updates to improve ADAS calibration (the B05 model has a reportedly improved steering tune that could be applied to the B10). While this is primarily a nuisance that can be partially mitigated by disabling lane-keep assist, the system tends to reactivate automatically. The cost impact is minimal (software-based fix) but the safety and frustration implications are significant.

Both the B10 and C10 share this frustration. Owners report that customised settings for steering weight, throttle response, regenerative braking level, and ADAS functions reset to factory defaults each time the car is switched off. This means repeatedly navigating touchscreen menus every drive. A March 2026 OTA update introduced multifunction steering wheel button shortcuts that partially address this, but the underlying preference-persistence problem has not been fully resolved on all units. While not a mechanical reliability issue, it significantly impacts daily usability.

Reported on the Leapmotor forum: after removing the charging cable, the car's system continues to detect it as connected, which immobilises the vehicle as a safety measure. A related V2L error has been triggered by moisture on the charging port's protective rubber seals, particularly after overnight slow charging in damp conditions. The car stopped mid-roundabout in one case. Leapmotor has been urged to develop a better fail-safe that does not completely immobilise the vehicle. Dealer diagnosis and sensor reset typically resolves it, but the root cause may require a software update or sensor replacement.

Reported on Leapmotor C10 models and potentially affecting the B10 which shares the electrical architecture: the 12V auxiliary battery can drain from 13.4V to 6-7V within 15-20 minutes of being disconnected from the DC-DC converter. This suggests either a faulty 12V battery, a parasitic drain from always-on electronics, or a DC-DC converter malfunction. If the 12V battery dies completely, the car cannot be started. Solutions include replacing the 12V battery (€100-200) or diagnosing the DC-DC converter (more expensive). This is a common issue across many EV and PHEV platforms, not unique to Leapmotor.

Early B10 units suffered from slow infotainment boot times (15+ seconds), during which the reversing camera is unavailable. Wireless Apple CarPlay connectivity has been reported as unreliable, dropping connection and refusing to reconnect without a full system reset. The March 2026 OTA update introduced a 'Quick Start' preloading feature and added wired/wireless Apple CarPlay and Android Auto support, which has improved the situation. However, some owners report that connectivity issues persist. If the infotainment control unit itself fails, replacement costs could be significant (€200-300 for diagnosis and potential hardware swap), though this would be covered under warranty.

If the B10 REEV is used primarily on short trips within its 80 km electric range, the 1.5L petrol generator may run very infrequently. This can lead to oil degradation, dried-out seals, and potential starting issues for the combustion engine. Leapmotor's system does include periodic forced engine starts to circulate oil, but owners who rarely use petrol should ensure the engine runs periodically. The 1.5L naturally aspirated engine operates at low stress (never exceeding approximately 2,000 rpm under normal conditions) and is designed for longevity, but long periods of inactivity remain a theoretical concern for any range extender.