Affordable European-market EV from China's largest EV maker, built on BYD's e-Platform 3.0 with an in-house Blade Battery. The Comfort trim sits in the middle of the range with the larger 60.4 kWh LFP pack and 150 kW motor, offering around 400 km of WLTP range. Early reliability data looks promising, with high-mileage examples exceeding 200,000 km in commercial use, though the European service network is still expanding.· more· less
12V battery goes flat after inactivity or following OTA updates, preventing the car from starting · more· less
A known issue across BYD's EV range. The DC-DC converter that charges the small 12V battery from the main pack can behave inconsistently, particularly after OTA software updates or extended parking periods of a week or more. Symptoms include slow dashboard startup, random error messages, and the car refusing to power on. BYD has acknowledged the issue and released software updates to improve DC-DC converter management. Replacement of the 12V battery itself costs around €120-180, but if the DC-DC converter module needs attention, costs can reach €260. A battery maintainer during long storage periods is recommended.
Infotainment and software glitches
€0 - 1502 of 6
Screen freezes, CarPlay/Android Auto disconnections, and settings resetting after OTA updates · more· less
The BYD Dolphin's infotainment system can experience interface freezes, Bluetooth and wireless CarPlay instability, and user profiles resetting after OTA updates. Some owners report that after an OTA update, activating climate control via the app puts the car in a quasi-ready state with interior lighting turning on while the car remains locked. Most issues are resolved through subsequent OTA updates or a factory reset of the infotainment system. BYD service centres can flash firmware directly if needed, recovering roughly 95% of issues without hardware replacement. The cost is typically €0 under warranty or up to €150 for a diagnostic visit and manual firmware update out of warranty.
ADAS false braking and collision warnings
€0 - 1803 of 6
Forward collision system triggers phantom braking at roundabouts and in low-speed traffic · more· less
The forward collision warning and automatic emergency braking system can trigger unnecessarily, particularly when approaching roundabouts or when vehicles ahead turn off the road. Owners report five loud beeps with red dashboard alerts even when no obstacle is present. The child presence detection system also generates false alarms, especially when owners remain in parked vehicles. The phantom braking events can be reduced by adjusting ADAS sensitivity settings (setting Predictive Collision Warning and Front Cross Traffic Braking to Off). Software calibration at a BYD service centre costs €60-180 and can improve sensor behaviour. BYD has been refining the algorithms through OTA updates.
Electric power steering (EPS) sensor fault
€60 - 4004 of 6
Steering warning light and temporary stiffness from sensor misalignment or controller issue · more· less
Some Dolphins have triggered EPS fault messages with a steering warning light and momentary steering stiffness. In most cases this is a software calibration issue resolved by an OBD diagnosis and sensor realignment at a cost of around €60-180. In rare cases, the steering column controller may need replacement. This is worth noting because BYD recalled 96,714 Dolphins produced in China (February-December 2023) for a CEPS controller defect that could cause micro-cracks and overheating. While the recall was issued in China, European-spec Dolphins from the same production period should be verified with BYD using the VIN.
Suspension noise on rough surfaces
€50 - 3605 of 6
Crunching and thumping sounds over cobblestones from loose trim clips or worn stabilizer links · more· less
The BYD Dolphin weighs around 1,520 kg due to the battery pack, which puts more stress on suspension components than comparable ICE hatchbacks. Owners report crunching sounds on cobblestones and thumping over potholes. Common causes include panel clips not fully seated, door seals needing adjustment, and stabilizer bar connecting rod wear. Solutions range from lubricating seals and re-seating clips (€50-100) to replacing stabilizer link rods (€150-360 including alignment). The issue is primarily cosmetic rather than safety-related.
Slow DC charging in cold weather (no preconditioning)
€06 of 6
LFP battery accepts only 10-20 kW below 0 degrees instead of the 88 kW maximum, with no automatic preconditioning available · more· less
This is a design characteristic rather than a fault, but it significantly affects usability for long-distance winter driving. The BYD Dolphin's LFP battery is more sensitive to cold than NMC batteries, and below 10 degrees DC charging speed drops substantially. Below 0 degrees, the battery may accept only 10-20 kW instead of the 88 kW maximum. No BYD model sold in Europe currently offers automatic battery preconditioning before arriving at a DC charger. The only workaround is highway driving for 30-45 minutes before stopping to DC charge, which warms the battery naturally. This is not a repair cost but can make the car impractical for winter road trips with frequent charging stops.
Mechanically robust, but software and electronics need maturing
The BYD Dolphin's core powertrain (Blade Battery + electric motor) is proving reliable, with high-mileage commercial examples exceeding 200,000 km with minimal issues. The LFP battery chemistry allows frequent 100% charging without accelerated degradation. The main ownership concerns are software-related: infotainment glitches, 12V battery management, and ADAS false alerts. These tend to improve with OTA updates. The lack of DC charging preconditioning is the most significant functional limitation for cold-climate buyers.
Service history
Complete BYD-authorized service records are essential to maintain the 6-year warranty. Verify all service stamps.
Tires
Check tread depth, age, and uneven wear. EVs consume tires faster due to weight and instant torque. Verify EV-rated tires are fitted.
12V battery condition
Ask about 12V battery replacements. Test dashboard startup speed. Slow boot or error messages suggest 12V battery degradation.
Test drive
Minimum 20 minutes including varied speeds. Test regenerative braking, listen for suspension noises over rough surfaces.
Specific for this vehicle
Test all ADAS functions during the drive
Drive through a roundabout and in slow traffic. Watch for false collision warnings or unexpected braking events. Check if ADAS sensitivity settings have been modified.
Check DC charging capability
If possible, test a DC fast charge session. Verify the car reaches close to 88 kW peak rate (in warm weather). Significant underperformance may indicate a battery management issue.
Verify infotainment software version
Check that the latest OTA update is installed. Ask about any history of infotainment freezes, resets, or CarPlay disconnections. Test wireless phone connectivity during the drive.
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Verify steering column recall status (early 2023 production)
Contact BYD with the VIN to confirm whether the CEPS controller recall applies to this specific vehicle and whether it has been completed.
Inspect underbody for damage
The Dolphin has relatively low ground clearance. Check the underbody aerodynamic shield and battery tray for scrapes, cracks, or replacement evidence.
Check battery state of health (SoH)
Ask BYD or use an OBD tool to verify battery SoH percentage. LFP batteries degrade slowly, so expect 95%+ on cars under 50,000 km.
Recalls and Technical Service Bulletins
CEPS steering controller defect - micro-cracks causing overheating risk (Feb 2023 - Dec 2023 production)Verify with VIN
Takata airbag inflator (if applicable to production date)Verify with VIN
Contact BYD with the VIN to verify all applicable recalls have been completed. The steering column controller recall is particularly important for 2023-production vehicles. BYD's European recall infrastructure is still maturing, so confirm directly with a BYD-authorized service centre.
Warranty Status
Vehicle warranty (6 years / 150,000 km)Likely still active on most used Dolphins (first sales in Europe from late 2022/2023)
Blade Battery warranty (8 years / 250,000 km)Active on all Dolphins, minimum 70% state of health guaranteed
Electric drive unit (8 years / 150,000 km)Covers motor and motor controller
Anti-perforation warranty (12 years / unlimited km)Rust-through coverage
Paint defect warranty (3 years / unlimited km)Likely expired on earliest models
BYD offers one of the most comprehensive warranty packages in Europe. The 6-year vehicle warranty is transferable to subsequent owners provided the service history is complete. Battery warranty was extended to 250,000 km in January 2026, retroactively covering existing owners. Unauthorized modifications to the electrical system, battery, or software will void coverage for affected components.
Sources: Research draws on model-specific owner forums and owner communities, recall information from official authorities, German automotive press, and multiple workshop cost references cross-checked against each other.
This report is for informational purposes only and does not constitute professional advice. Estimates may be inaccurate. Always have a qualified specialist inspect the vehicle before purchase. We accept no liability for decisions made based on this information.
