Updated guide based on reports from workshops, spare parts dealers, and motorists: how BYD ADAS works, when to calibrate , frequent false warnings, costs, and prevention.
🔗 Read the BYD 2025 first: MOST COMMON PROBLEMS, BATTERY BLADE, CHARGING AND MAINTENANCE
✅ 2025 Overview: What to Expect from BYD ADAS
The BYD 2025 range (focusing on Dolphin , Seal , and Atto 3 ) offers comprehensive ADAS packages: ACC (adaptive cruise control), LKA/LDP (lane keeping assist/lane centering), AEB (autonomous braking), BSD/RCTA (blind spot/parking exit assist), and Traffic Sign Recognition . Effectiveness depends on proper calibrations , updated software, and clean/aligned sensors.
- Strengths: complete package, good value for money, frequent OTA updates (depends on area/model).
- Typical limitations: sensitivity to replaced windshields , non-approved suspension/wheels , rain/fog/low sun, faded signs or construction sites.
Pulsar Max Wallbox – 7.4 kW EV Charger
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 Amazon🧠 How BYD ADAS (sensors, cameras, radar) work
The ADAS "brain" combines a front camera (on the windshield), front radar (behind the grille), rear radar / ultrasound , and control units. Sensor fusion allows it to recognize lane markings, vehicles, pedestrians, cyclists, and signs.
| Component | Function | Symptoms if out of calibration |
|---|---|---|
| Windshield camera | Lanes, signals, pedestrians/cyclists (AEB/LKA/TSR) | LKA inaccurate, “camera blocked,” false IDs |
| Front radar | Vehicle Distance (ACC/AEB) | ACC that brakes/accelerates jerkily, AEB that intervenes late/early |
| Rear radar/ultrasound | Blind Spot Detection (BSD), Rear Traffic Alert (RCTA), Parking | Continuous alarms when reversing or failure to signal |
Any work on the windshield, bumper, suspension, wheels/tires , or even minor impacts may require recalibration (static in the workshop and/or dynamic on the road).
🎯 BYD ADAS calibrations: when they're needed, how to do them, and how much they cost.
When calibration is mandatory
- Windshield replacement or camera bracket removal/reapplication
- Collisions/accidents, even minor ones, front or rear
- Interventions on bumpers , radar supports, masks/grilles
- Modifications to the suspension (springs, shock absorbers), tire sizes , or wheel offsets
- Recurring malfunction messages or warnings after OTA updates
Calibration Types
- Static (in the workshop): with target panels and alignment tools.
- Dynamic (on road): at specific speeds and conditions for learning.
- Mixed : first static, then dynamic for finishing.
💶 Approximate calibration costs (partner workshop network)
| Intervention | When needed | Range €* |
|---|---|---|
| Windshield camera calibration | New windshield / bracket removed | 120 – 260 |
| Front radar calibration | Frontal impacts / bumper removed | 140 – 300 |
| Complete package (camera + radar) | After accident or multiple replacements | 220 – 480 |
| Rear sensor alignment | Rear impacts / bumpers | 80 – 180 |
*Indicative ranges: vary by area, instrumentation, times and BYD models.
⚠️ Most common fake warnings about Dolphin, Seal, and Act 3 (2025)
The collected reports converge on these recurring patterns; they are often resolved with sensor cleaning, recalibration, or a software update.
| Symptom | Probable causes | Recommended solution |
|---|---|---|
| LKA “zigzags” or leaves lane | Camera off-center, faded lines, low sun/rain | Cleaning the windshield in the camera area, checking calibration, and updating the software |
| ACC brakes without obvious obstacles | Radar pointing/oscillating, reflections from guardrails, vehicles in adjacent lanes | Radar support check, recalibration, dynamic test |
| Continuous BSD/RCTA alarm when reversing | Dirty sensors, rear impact, heavy rain | Sensor cleaning, rear alignment, diagnostic check |
| TSR reads incorrect limits | Old signals covered/construction sites, room to be recalibrated | Camera calibration, comparison with maps (if available), update |
Also see the sheets:
- 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
🧰 Preventive maintenance and practical advice
- Windshield: Use microfiber cloths and streak-free cleaners in the windshield area; avoid unapproved films/tints in that area.
- Winter/Rain: Remove ice/snow from sensors and radar; watch out for ice on the grille.
- Tires/setup: stay within the approved sizes ; correct pressures → more stable lane.
- Software: Run OTA when available and recalibrate if unusual warnings appear.
- After repairs: Always ask for a printed or digital calibration report from the shop.
❓ Frequently Asked Questions (ADAS BYD 2025)
Do I need to calibrate the ADAS after replacing the windshield?
Yes. The camera must be realigned with target panels; without calibration, LKA/AEB may behave inaccurately.
Can OTA updates affect ADAS?
Yes. Some updates change detection/sensitivity parameters; in rare cases, post-update diagnostics and dynamic testing are required.
Why does ACC brake “in vain” on guard rails or curves?
Improperly aimed radar or reflections/adjacent vehicles can deceive it. Support checks are required and, if necessary, recalibration is necessary.
If I fit larger rims, does anything change?
Yes: trim/angle settings may vary. Use approved measurements and check the need for recalibration after major modifications.
🏁 Conclusions
BYD 2025 ADAS are complete and effective if sensors and software are up to specification . After windshields , impacts , or setup changes , schedule calibration and check road behavior.
