Updated guide based on reports from workshops, spare parts dealers, and motorists: symptoms, probable causes, solutions, and prevention.
✅ 2025 Overview: Versions, Strengths/Weaknesses
The BYD Seal U is an electric SUV from the BYD family, designed on the e-Platform with a Blade Battery (LFP) , air conditioning with a heat pump , and V2L (Vehicle-to-Load) functions. In Italy, it is offered with various trim levels and battery sizes; ADAS are standard, and OTA updates progressively improve infotainment and assistance features.
- Actual range varies based on battery/wheels/driving style; optimal in moderate extra-urban cycles.
- Strengths : LFP efficiency, habitability, complete ADAS equipment, perceived quality of the passenger compartment.
- Typical category limitations : aerodynamic noise above 110 km/h on some models, charging curve variation in cold temperatures, ADAS sensor tolerances to be recalibrated after work on the windscreen/bumper.
🔗 Read also: BYD 2025: MOST COMMON PROBLEMS, BLADE BATTERY, CHARGING AND MAINTENANCE
🔧 Main problems with the BYD Seal U (2025 update)
Collection of the most reported critical issues in 2024-2025 on BYD Seal U by the workshop/spare parts dealer network and car community: focus on charging , software/infotainment , ADAS , tire wear , heat pump air conditioning , 12V battery and chassis/brake components.
- DC/AC charging: fluctuating power, compatibility
- Infotainment/OTA: lag, apps, reset
- ADAS/cameras: false warnings, calibrations
- EV Tires: Sidewall Wear, Rotation/Pressures
- Heat pump/HVAC: winter performance, initial odors
- 12V/IBS Battery: Random Lights, System Warnings
- Suspension and brakes: noises, oxidized discs
1) DC/AC charging: fluctuating power, station compatibility
- Typical symptoms: DC power that rises/falls in steps , session that interrupts at the columns of specific operators, single-phase AC with perceived long times.
- Common causes: poor battery thermal management; handshake with charging stations with outdated firmware; worn Type 2 cable.
- Quick fixes: Precondition the battery before connecting to DC (navigation to the charging station), OTA update, cross-test on different infrastructure; use a 32A certified cable for AC.
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Electric vehicle charger with Type 2 connector and 5 m cable. Supports Wi-Fi, Bluetooth, and OCPP. Easy installation, indoors or outdoors, up to 7.4 kW.
🛒 Buy now on Amazon2) Infotainment/OTA: interface lag, apps that close, need to reset
- Symptoms: Touch delays, apps not launching, Android Auto/CarPlay disconnecting.
- Causes: Full cache, poor USB permissions/data cable, firmware waiting for OTA.
- Solutions: soft reset infotainment, clear app cache, replace MFi/AA cable, check and install available OTAs, reset settings (with preferences backup).
3) ADAS/cameras: false distance warnings, “nervous” lane keeping
- Symptoms: early collision warnings, lane centering that corrects with frequent micro-interventions, cameras that get dirty and degrade the 360°.
- Causes: partially blocked sensors, calibration not performed after interventions on the windshield/mask, ADAS profiles too sensitive.
- Solutions: Cleaning sensors/radar, ADAS calibration in the workshop (target and alignment), setting the profile to “normal” instead of “high sensitivity”.
4) EV tires: inner shoulder wear, rolling noise
- Symptoms: pronounced wear on the rear inner shoulders, rustling noise on loose asphalt, range that decreases with low pressures.
- Causes: instantaneous torque and EV mass; slightly negative rear camber ; pressures not maintained.
- Solutions: Rotation every 8-10,000 km , proper pressures at full load/highway, check ride height/toe-in; choose EV-ready tyres with low resistance and a reinforced carcass.
5) Heat pump/HVAC: winter performance and initial odors
- Symptoms: The passenger compartment takes longer than expected to warm up below 0°C, a slight odor when using the air conditioning for the first time on new cars.
- Causes: evaporator defrost cycles; production residues in the air circuit; saturated cabin filter.
- Solutions: Pre-conditioning via app while charging, cabin filter (HEPA/carbon) replaced after 12 months, duct sanitization.
6) 12V/IBS Battery: System Messages, Delayed Start/Ready
- Symptoms: Occasional warning lights that disappear upon restart, drive mode not available upon first start after long stops.
- Causes: 12V battery not fully charged, IBS sensor (negative pole) sensitive to low voltages, occasional use of the car.
- Solutions: 12V maintainer in garage, 12V replacement with correct specification , IBS learning reset after replacement.
7) Suspension and brakes: noises at low speed, oxidized disc surface
- Symptoms: clicking on rough surfaces, very light hissing when braking after rain, “glazed” brakes with only regenerative use.
- Causes: Sway bar link tolerances; moisture/rust on discs from underuse of hydraulic brakes; dry caliper guides.
- Solutions: greasing caliper guides, periodic hard braking to clean discs, replacing worn connecting rods/shock absorbers, checking tightening torques.
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🛒 Buy now on Amazon💶 Indicative repair costs (actual ranges from partner workshop network)
| Intervention | Cause/Symptom | Range €* |
|---|---|---|
| ADAS (radar/camera) calibration | False warnings, windshield/mask replacement | 180 – 360 |
| Charging diagnosis + update | Unstable DC power / handshake failed | 80 – 180 |
| 12V battery replacement + IBS reset | Random lights / delayed start | 150 – 260 |
| Air conditioning sanitization + cabin filter | Odors/HVAC output | 60 – 140 |
| Trim/toe alignment | Shoulder / drift wear | 70 – 120 |
| Brake service (guide cleaning + polishing) | Oxidation of discs / whistles | 80 – 160 |
| Replacing the stabilizer bar links | Front end noises on uneven surfaces | 140 – 260 |
*Ranges are indicative and vary by year, trim, part quality (OEM/Aftermarket) and local labor.
🧰 EV Scheduled Maintenance – BYD Seal U
General instructions for Italian use (urban/extraurban). Always consult the BYD owner's manual for official specifications.
| Intervention | Recommended interval* | Notes |
|---|---|---|
| Brake check + caliper guide cleaning | 12 months / 15,000 km | Regenerative use reduces consumption but increases the risk of oxidation: perform “cleaning” braking. |
| Cabin filter (HEPA/carbon) | 12 months / 15,000 km | Improves HVAC performance and reduces initial odors. |
| Brake fluid (DOT 4 LV) | 24 months | Check boiling point; EV brakes lightly but moisture remains. |
| Tire rotation + alignment | 8-10,000 km | Essential on EVs for even wear and range. |
| 12V/IBS control and OTA updates | 12 months / with each service | 12V health affects systems, ADAS and infotainment. |
| Battery/inverter thermal circuit liquids | 24-month inspection (replacement according to BYD specifications) | Follow OEM specifications only. |
*Indicative intervals: may vary based on year/batch/equipment and conditions of use (climate, towing, mountains, taxi, etc.).
❓ Frequently Asked Questions
Is the BYD Seal U 2025 reliable?
Overall, yes: LFP batteries and OTA help in the long run. EVs still have some inherent issues (charging, infotainment, sensitive ADAS) that can be addressed with targeted updates and maintenance.
How to optimize fast charging?
Navigate to the charging station to activate pre-conditioning, arrive with a 10-20% SOC, choose reliable stations, and check the charging station firmware. In winter, pre-condition with AC.
How often should you rotate your Seal U tires?
Every 8-10,000 km (or 12 months). On EVs, battery rotation is essential to keep costs down and maintain range.
Do ADAS “correct” too much?
Sensor cleaning, alignment checks, and calibration reduce false alerts. Set sensitivity to "normal" or disable unnecessary features in complex urban environments.
🏁 Conclusions & Contacts
The BYD Seal U 2025 is a balanced and comfortable electric SUV. Understanding recurring issues (charging, infotainment, ADAS, tires) and taking preventative action can reduce costs and stress, maximizing range and durability.
Having doubts about your chassis? Contact us: we'll check specific parts , upgrades , and campaigns for your car.
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1 comment
Luca
seal u dm-i a chiusura e blocco parte l’antifurto.
anche senza pesi e/o seggiolini su sedili posteriori che potrebbero essere rilevato dal sensore anti abbandono … qualcuno sa come risolvere la cosa?