Leapmotor T03 Mk1

Multiple European owners report OTA update failures where the installation stops partway and displays an error message asking to contact the dealer. In some cases, the car's charging function stopped working after an update, requiring a dealer visit or 12V battery disconnect to reset. Other reported post-update bugs include brake indicator lights not displaying correctly on the dashboard and Auto Hold not engaging properly. Leapmotor's communication about update rollouts has been criticised, with even dealers reportedly unable to get timely answers from the manufacturer after submitting support tickets. Most software issues resolve through a full system reboot (disconnect 12V battery for 10-15 minutes) or a subsequent OTA patch, but the frequency of these problems suggests the software platform is still maturing for the European market.

A recurring complaint among T03 owners is that AC charging via wallbox stops prematurely, with the car showing 'Charging complete' even though the set charge limit has not been reached. This appears linked to the battery management system being overly cautious, particularly when cell voltages are slightly unbalanced. Some owners resolved the issue by adjusting wallbox amperage settings (reducing to 10A), while others found that performing three full charge cycles (to 100%) as recommended by Leapmotor for new cars helped the BMS calibrate properly. If the issue persists, a dealer visit for BMS recalibration may be needed. In rare cases, the charging module itself may need replacement, costing approximately €300-400.

A small number of T03 owners have reported significant battery cell imbalance, with voltage differences between cells reaching up to 650 mV (normal is under 20 mV). Symptoms include dramatically reduced range (sometimes half of expected), very slow charging, and battery warning lights. The T03 uses an LFP (lithium iron phosphate) battery, which is inherently more stable than NMC chemistry, making severe cell degradation uncommon. When it does occur, the battery is typically covered under the 8-year / 160,000 km battery warranty. Out-of-warranty replacement costs would be substantial (estimated €3,000+ for a 37.3 kWh pack), but given the car's age in Europe (from late 2024), virtually all T03s remain within warranty for this component.

Some owners have experienced a sudden 'System Fault, Service required' warning on the dashboard, accompanied by a speed restriction to approximately 25-40 km/h. This has been reported occurring as early as a few hundred kilometres into ownership. In most documented cases, the error cleared after restarting the car, with no recurrence. The fault appears to be triggered by sensor glitches or software communication errors rather than a genuine mechanical problem. If the warning persists after restart, a dealer diagnostic is needed, which is covered under the 3-year vehicle warranty. No reports of costly repairs resulting from this error have surfaced.

The T03 does not have a heat pump, relying on a resistive heater for cabin warmth. This significantly impacts winter range, with owners reporting 30% or more reduction in cold weather. Additionally, owners have found that the air conditioning only operates in cooling mode, which complicates winter demisting. The demist function does engage the AC compressor and works effectively, but the system's behaviour can be confusing. Workaround: use the demist button, then adjust temperature and fan speed while remaining in demist mode. Some owners place silica gel bags in the cabin to reduce moisture. This is a design characteristic rather than a defect, but it noticeably affects winter usability and range.

The T03 comes with 10 ADAS systems required by EU regulation, but their calibration has been widely criticised. The lane keeping assist is inconsistent, and when it does engage, the steering correction feels abrupt. The fatigue detection camera can trigger false warnings within minutes of driving. Most frustrating for owners: ADAS settings reset to their default (active) state after each drive cycle, so features like lane departure warning must be manually disabled every time. Leapmotor has acknowledged this as a regulatory compliance issue and stated that improvements are being worked on through OTA updates, but as of mid-2026, the fundamental reset behaviour remains. A workaround exists through the customisable steering wheel button, which can be configured to toggle specific ADAS features.