Updated guide based on reports from workshops, spare parts dealers and motorists: symptoms, probable causes, solutions and prevention specific to BYD Seal 2025 .
✅ 2025 Overview: Versions, Strengths, and Possible Limitations
The BYD Seal 2025 is an electric sedan with a dedicated platform, LFP Blade battery, RWD or AWD drivetrain, and over-the-air software updates. It is appreciated for its efficiency, ADAS features, and value for money.
- Typical versions in Italy : RWD (priority range) and AWD Performance (performance). Three-phase AC and fast DC charging (variable curves for temperature/SoC).
- Strengths : real efficiency, well-modulated brakes with regeneration, robust LFP battery pack, technological interior.
- Possible limitations : charging station compatibility not always uniform (CCS2 handshake), OTA which sometimes introduces temporary lags, accelerated tyre wear on AWD and large rims, reduced range in the cold.
🔗 Read also: BYD 2025: MOST COMMON PROBLEMS, BLADE BATTERY, CHARGING AND MAINTENANCE
🔧 BYD Seal Main Issues (2025 Update)
Below are the most common cases reported on Seal in Italy in 2024-2025: symptoms, probable causes, recommended interventions, and prevention.
- AC/DC charging (handshake, interrupts, power)
- HV Battery & Real-World Battery Life (SoH, Cold, BMS)
- 12V auxiliary battery (warning, low)
- Infotainment & OTA (lag, crashes, connectivity)
- Brakes & Tires (Regeneration, EV Wear)
- Trim & noises (front end, plastics)
- ADAS & Calibration (Cameras/Radar)
- Air conditioning & heat pump
1) AC/DC charging: handshaking, interruptions, power drops
- Typical symptoms : charging that does not start or stops, lower than expected DC power, error messages on some charging stations.
- Common causes : CCS2 handshake not completed (cable/column tolerances), battery temperature outside optimal window, settings limits (e.g. SoC % limit ), OTA update in progress.
- Quick fixes : Try another socket/cable, restart session, check SoC limits in infotainment, precondition battery (navigation to charging station), update software. In AC: Use a 32A certified Mode 3 cable.
- Prevention : keep your car up to date, choose reliable charging stations, avoid high SoC during prolonged parking.
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🛒 Buy now on Amazon2) HV battery and real autonomy: cold, SoH and BMS
- Symptoms : Reduced perceived range in winter, % dropping rapidly on motorway routes, fluctuating range estimates.
- Causes : low temperature (LFP cell physics), driving style/speed, winter tires, BMS to be recalibrated.
- Solutions : Precondition (app or navigation), occasional 0–100%/100–10% cycles to recalibrate the estimate, correct tire pressure, optimize climate control (ECO, heated seats/steering wheel).
- Note : Battery health ( SoH ) is checked via diagnosis; always follow BYD specifications on charging and storage.
3) 12V auxiliary battery: warning and discharge
- Symptoms : “electrical system” messages on start-up, clock/infotainment reset, intermittent ignition after long stops.
- Causes : using services with the ignition off, active telematics, repeated short cycles, aged 12V battery.
- Solutions : check for abnormal current draw, software updates, replace 12V with a compliant type, trickle-charge if the car is left unused for a long time.
4) Infotainment & OTA: lag, crashes, connectivity
- Symptoms : Slow UI, random reboots, CarPlay/Android Auto instability, remote app not updating status.
- Causes : Partial OTAs, full cache, poor data cables, “dirty” Bluetooth pairing.
- Solutions : Complete OTA with car charging, soft reset infotainment, unpair/recreate phone profile, use quality MFi/AA cables.
5) Brakes & Tires: Regeneration and Typical EV Wear
- Symptoms : squealing/surface rust on trails, vibration after long stops, front shoulder wear or accelerated wear on AWD.
- Causes : prevalent use of regeneration (few “hot” braking), immediate EV torque, non-optimal convergence, incorrect pressures.
- Solutions : Periodic brake burnishing (a few hard, safe stops), caliper cleaning and sliding during maintenance, annual alignment/alignment , tire pressures to specification. Consider EV-ready tires (low resistance + reinforced carcass).
6) Trim & noise: front end and plastics
- Symptoms : clicking on rough surfaces, creaking from dashboard/doors, sharp knocks on bumps.
- Causes : no engine noise = more noticeable acoustic defects; stabilizer bar rubbers, heads, panel fasteners/gaskets.
- Solutions : torque tightening, gasket lubrication, connecting rod/rubber replacement, shock absorber mounting check.
7) ADAS & calibration: cameras/radars
- Symptoms : AEB/ACC warnings unavailable, intermittent lane keeping, warning after windscreen replacement.
- Causes : sensor misalignment, new glass without calibration, incomplete updates.
- Solutions : static/dynamic ADAS calibration with dedicated equipment, control unit updates, radar mounting checks.
8) Air conditioning & heat pump
- Symptoms : poor performance in the cold, odors from vents, rapid fogging.
- Causes : saturated cabin filter, humidity in the system, non-optimal refrigerant charge.
- Solutions : cabin filter replacement (12 months or heavy use), sanitization, refrigerant leak/quantity check according to BYD specifications.
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🛒 Buy now on Amazon💶 Indicative repair/maintenance costs (actual range from partner workshop network)
| Intervention | Symptom/Use Case | Range €* |
|---|---|---|
| AC/DC Charging Diagnostics + Updates | Handshake, interrupts, low power | 60 – 150 |
| Check HV battery status (SoH report) | Reduced/fluctuating autonomy | 80 – 180 |
| 12V battery replacement (including coding if applicable) | Electrical warning/uncertain cold starts | 120 – 260 |
| ADAS calibration (static/dynamic) | ACC/AEB not available, windshield replaced | 140 – 380 |
| Air conditioning system service + cabin filter | Low yield/odors, fogging | 90 – 220 |
| Brake cleaning/service (caliper sliding) | Whistling, rust, light vibrations | 80 – 180 |
| Rod ends/rubbers + toe-in | Front end/drift noises | 160 – 360 |
| Replacement of the socket door actuator | Socket that does not lock/unlock | 90 – 220 |
| EV-ready tire set (mounting included) | High consumption/noise | 480 – 980 |
*Ranges are indicative and vary by year/version, part quality (OEM/Aftermarket) and local labor.
🧭 Practical advice for maintenance and purchasing
Essential Maintenance on BYD Seal
- Tire pressure : Check monthly and before every trip; essential for mileage and wear.
- Brakes : Perform a periodic brake burn to avoid rust on the tracks and vibrations.
- Updates : Keep OTA and infotainment up to date, especially if you use DC fast frequently.
- Climate : Replace the cabin filter every 12 months (sooner if you spend a lot of time in the city); sanitize at the beginning of summer.
- Alignment : Check annually or after bumps/potholes; reduces wear and improves stability.
- 12V : If the car is left unattended for a long time, use a suitable battery maintainer; it reduces warnings and problematic starts.
Checklist before buying (new/used)
- OTA history, any technical campaigns and documented coupons.
- Road test: cabin silence, stability and ADAS operation.
- Charging test: domestic AC/Wallbox + a known and reliable fast DC.
- Battery SoH diagnosis and stored errors.
- Check tire wear and alignment.
🔗 Other useful content:
- BYD DOLPHIN 2025: COMMON PROBLEMS, SOLUTIONS, AND ADVICE
- BYD SEAL 2025: COMMON PROBLEMS, SOLUTIONS, AND ADVICE
- BYD SEAL U 2025: COMMON PROBLEMS, SOLUTIONS, AND ADVICE
- BYD ATTO 3 YUAN PLUS 2025: MOST COMMON PROBLEMS, SOLUTIONS, AND ADVICE
- BYD HAN 2025: COMMON PROBLEMS, SOLUTIONS, AND ADVICE
- BYD TANG 2025: COMMON PROBLEMS, SOLUTIONS, AND ADVICE
❓ Frequently Asked Questions
Is the BYD Seal 2025 reliable?
Overall, yes. The main issues reported are charging station compatibility, minor OTA bugs, and tire wear typical of EVs. With proper maintenance and updates, the experience is positive.
What are the most common charging problems?
Handshake not starting or interruptions at specific charging stations. This is often resolved by changing the docking station/cable, updating the software, checking the SoC limits, and preconditioning the battery.
How often should you service the brakes on an EV?
Annual checkup (or 15–20,000 km) with caliper cleaning/sliding, especially if you use a lot of regeneration. Replace brake fluid every 24 months, unless BYD recommends otherwise.
Can I increase my actual range with simple tricks?
Yes: correct tire pressures, ECO mode, preconditioning in winter, constant speed and the use of seat/steering wheel heaters reduce the load on the air conditioning.
🏁 Conclusions
The BYD Seal 2025 is an attractive electric sedan for its efficiency and features. By identifying recurring issues and following good maintenance practices (updated software, well-maintained brakes, EV-ready tires, and a clean ride), you can reduce costs and maintain its value over time.
Having doubts about your frame? Contact us: we'll check compatible spare parts , specifications , and any campaigns for your Seal.
