Updated guide based on reports from workshops, spare parts dealers, and motorists: symptoms, probable causes, solutions, and prevention specific to electric vehicles.
Read also: BYD DOLPHIN 2025: MOST COMMON PROBLEMS, SOLUTIONS, AND ADVICE
✅ 2025 Overview: Versions, Strengths/Weaknesses
In 2025, the BYD Han will confirm its position as a premium electric sedan with a Blade Battery (LFP) , RWD or AWD drivetrain, and a full ADAS package (DiPilot). Strengths: comfort, LFP efficiency, features, and safety. Typical EV limitations: variable charging speed based on temperature/SOC, evolving software, and some ride noise on uneven surfaces.
- Han EV RWD : efficiency and comfort for mixed use.
- Han EV AWD/Performance : maximum performance and traction, slightly higher fuel consumption.
- Han DM‑i (PHEV) in some markets: different thermal/electric management logic (in EU pure EV prevails).
🔧 Main problems with the BYD Han (2025 update)
Below are the most recurring critical issues reported in 2024-2025 on BYD Han: HV battery & charging , air conditioning/heat pump , infotainment/OTA , ADAS/cameras , brakes/regeneration & tires , chassis/noise , 12V battery .
- HV Blade Battery & BMS (autonomy, balancing, pre-conditioning)
- AC/DC Charging & CCS Port (Speed, Connector Lock)
- Air conditioning / Heat pump (warm air/odors, winter performance)
- Infotainment DiLink & OTA (lag, bugs, CarPlay/Android Auto)
- ADAS/cameras (warnings, lane centering, calibrations)
- Brakes & Regeneration / Tires (Squealing, Uneven Wear)
- Chassis and body (squeaks, suspension, seals)
- 12V battery / low voltage (random lights, discharged when vehicle is stationary)
- Actual cost table (workshop range)
1) HV Blade Battery & BMS: floating autonomy, cell balancing
- Typical symptoms: fluctuating estimated range, non-linear SOC percentages, slight reduction in range in winter.
- Common causes: battery temperature, cell balancing, predominantly slow AC/high SOC usage, BMS estimates to be realigned.
- Quick fixes: Perform battery pre-conditioning before fast charging, 10–90% charge cycles with periodic equalization , avoid prolonged storage >90% SOC, update BMS software when available.
2) AC/DC charging & CCS port: speed below expectations, connector block
- Typical symptoms: DC curves that struggle to peak, charging station error messages, connector that gets stuck.
- Common causes: cold/hot battery, high input SOC, limited charging station power, CCS port latch needs lubricating/adjusting, Type-2 cable with worn pins (AC).
- Quick fixes: Navigate to the charging station from Navi to preheat/cool the pack, start DC with 10–40% SOC, check OBC/DC-FC firmware, check the socket lock actuator and door seals; keep a certified Type-2 cable in good condition.
MOTOPOWER MP00207-FR – 6V/12V 4A battery charger
Intelligent and automatic battery charger with maintenance and recovery modes. Compatible with 6V and 12V batteries, safe and efficient.
🛒 Buy now on Amazon3) Air conditioning (heat pump): warm air/cold odors, winter efficiency
- Typical symptoms: reduced thermal output at very low temperatures, odor when starting the A/C, persistent fogging.
- Common causes: saturated cabin filter, bacteria in the evaporator box, missed circuit regenerations, 3-way valves/HVAC actuators to be realigned.
- Quick fixes: Sanitize the air conditioning + replace the cabin filter (activated carbon), update the HV compressor software, check the refrigerant charge and seals; use automatic defrost and pre-air conditioning during charging.
Read also: BYD 2025 EV AIR CONDITIONING: HEAT PUMP AND WINTER AUTONOMY
4) Infotainment DiLink & OTA: lag, bugs, CarPlay/Android Auto
- Symptoms: Sporadic reboots, slow startup, AA/CarPlay disconnections.
- Causes: Memory almost full, background apps, non-MFi/USB-IF data cables, intermediate OTA versions.
- Solutions: OTA update to the latest stable, factory reset (backup profiles), free up space, replace quality data cable, check grounds/power and USB ports.
Read Also: BYD 2025 SOFTWARE & OTA: INFOTAINMENT, BUGS, AND UPDATES
5) ADAS & cameras: false warnings, lane centering, calibration needed
- Symptoms: LKA too cautious, abrupt interventions, frequent beeps , 360° vision with halos at night.
- Causes: Dirty or misaligned camera/radar (windshield replaced), outdated ADAS software.
- Solutions: Optical and radar cleaning, post-window/trim ADAS calibration , DiPilot updates; adjust warning sensitivity from the menu.
Read also: ADAS AUTO 2025: WHAT THEY ARE, HOW THEY WORK, ADVANTAGES, LIMITS AND REGULATIONS
6) Brakes & regeneration / tyres: squealing, glassiness, shoulder wear
- Symptoms: low speed whistling, irregular “bite” sensation (mainly used during retreading), internal/external tire wear.
- Causes: under-stressed pads (oxidation), shiny discs, suboptimal pressure, wheel alignment to be checked on heavy vehicles.
- Solutions: Safe brake bed-in , system cleaning with a dedicated spray, caliper guide lubrication, periodic pressure and alignment checks; consider EV-ready tires.
VALVOLINE BRAKE CLEANER 500ML – 887059
Powerful brake cleaner: removes grease and residue, reduces squealing and improves braking consistency on EVs.
🛒 Buy on Autoricambi Tritella7) Trim and body: creaks, knocking on bumps
- Symptoms: noises on cobblestones/bumps, bumps during compression.
- Causes: Tolerances on sway bar links , pads/top-mounts, dry door seals.
- Solutions: front end play check, selective seal lubrication (EV-safe silicone), tightening torque check and silent block updates where applicable.
8) 12V battery / low voltage: random lights, discharged when parked
- Symptoms: Generic error messages at start-up, slow infotainment, ADAS warning lights after long stops.
- Causes: Aged 12V battery, vehicle not put to sleep, permanent accessories on OBD/12V.
- Solutions: Test and replace the 12V battery with a suitable type (AGM/LiFePO4 as specified), avoid fixed OBD dongles, lock the car, and wait for the modules to sleep before carrying out any electrical work.
💶 Indicative repair costs (actual ranges from partner workshop network)
| Intervention | Cause/Symptom | Range €* |
|---|---|---|
| Air conditioning sanitization + cabin filter | Odors/warm air, fogging | 40 – 120 |
| A/C (heat pump) recharge + leak test | Reduced yield when cold | 120 – 260 |
| Software update/OTA + diagnosis | Infotainment/ADAS lag | 70 – 180 |
| 12V battery replacement (AGM/LiFePO4) | Random lights/slow start | 120 – 280 |
| CCS door/lock actuator reset | Connector stuck/charging errors | 180 – 420 |
| ADAS (camera/radar) calibration | Inaccurate LKA/LCC | 240 – 520 |
| Front pads + discs | Whistles/vitrification | 140 – 380 |
| Bar linkages + convergence | Front end/drift noises | 160 – 360 |
*Ranges are indicative and vary by year, trim, part quality (OEM/Aftermarket) and local labor.
👉 Need the right parts for your BYD Han ? Contact us at autoricambitritella.it and we'll provide you with the exact chassis code .
🔌 Looking for charging accessories (Type-2 cables, cases, socket covers)? Contact us: we'll recommend compatible and safe products for your Han.
🧭 Practical advice for maintenance and purchasing
Recommended versions
- EV RWD : efficiency and comfort for everyday journeys.
- EV AWD : ideal if you want maximum performance and winter traction.
Checklist before buying (new/used)
- HV battery status (charging log, any certified State of Health )
- DC fast test: power curve check with pre-conditioned battery
- Updated OTA/infotainment, try CarPlay/Android Auto
- Tyre noise and wear (inner shoulders)
- ADAS: Lane Centering and Calibration After Glass Replacement
- 12V battery: age, voltage at rest and starting systems
❓ Frequently Asked Questions
Is the BYD Han 2025 reliable?
Overall, yes: robust LFP battery and full ADAS. Typical issues: variable DC speed with temperature/SOC, minor software bugs, and ride noise on rough surfaces. Updates and preventative maintenance help a lot.
Why is fast charging slower than advertised?
Power depends on battery temperature , initial SOC, and charging station. Precondition the battery by cruising at fast speed, starting with a 10–40% SOC, and using good bays.
Do you need to service the brakes on an electric car?
Yes: Excessive use of reconditioning can lead to shiny/oxidized discs. Schedule annual checkups, periodic bed-in , and guided caliper cleaning.
Can a 12V battery cause “random” lights?
Yes. A weak 12V supply can trigger ADAS/infotainment warnings. Testing and replacing with a suitable type (AGM/LiFePO4 as specified) often resolves the issue.
🏁 Conclusions
The BYD Han 2025 is a complete EV sedan. Understanding recurring issues (charging, HVAC, software, ADAS, brakes/wheels, 12V) and taking preventative action (preconditioning, updates, periodic checks) helps maintain comfort and efficiency over time.
Having doubts about your frame? Contact us: we'll check for compatible spare parts, charging accessories, and the latest updates for your Han.
