BYD Seal ADAS Features: Complete Guide to All Driver Assistance Systems
The BYD Seal includes a comprehensive ADAS suite covering forward collision warning, automatic emergency braking, adaptive cruise control with lane centring, emergency lane keeping, blind spot assist with rear cross traffic braking, traffic sign recognition, intelligent speed limit control, and door open warning. All features can be individually enabled or disabled through the touchscreen under ADAS > Driving Assist or ADAS > Safety Assist. These are Level 2 assistance systems. The driver must remain in full control at all times.
What Is ADAS?
ADAS stands for Advanced Driver Assistance Systems. These electronic safety features use cameras, radar sensors, and software to detect hazards, warn the driver, and in some cases brake or steer automatically to prevent collisions.
On the Seal, every ADAS feature is an assist, not autopilot. You remain responsible for controlling the vehicle at all times. For a comparison of how the same systems work on BYD's smaller SUV, see our Atto 3 ADAS features guide.
Sensors and Cameras
| Measurement | Sensor Type | Primary Function |
|---|---|---|
| Front camera | Multi-purpose video | Lane detection, TSR, FCW, AEB, ELKA |
| Front mmWave radar | Millimetre-wave | ACC, ICC, FCW, AEB (vehicles) |
| Rear corner radars (x2) | mmWave | BSA, BSD, RCTA, RCTB, RCW, DOW, ELKA |
| Ultrasonic sensors | Proximity | Parking assist, obstacle detection |
| 360-degree camera | Multi-view video | Around View Monitor, parking |
To add front recording and extra ADAS documentation, consider a BYD DVR dash cam with ADAS support that integrates with the Seal's existing sensor layout.
Every ADAS Feature Explained
Forward Collision Warning (FCW) and Automatic Emergency Braking (AEB)
FCW uses the front camera and radar to detect vehicles and pedestrians. When it senses collision risk, it warns visually and audibly. If you don't respond, AEB activates automatically to reduce or prevent impact.
- AEB speed range: 4 to 150 km/h
- Detects: Vehicles, pedestrians, cyclists
- Toggle: ADAS > Safety Assist
Adaptive Cruise Control (ACC) and Intelligent Cruise Control (ICC)
ACC maintains your set speed and adjusts distance from the vehicle ahead automatically. ICC adds steering assistance to keep the car centred in its lane while ACC is active.
- ACC speed range: 30 to 150 km/h
- ICC speed range: 0 to 120 km/h
- Following distance: 4 adjustable levels
- Follow-to-Stop: Can bring the car to a complete stop behind traffic
Lane Departure Assist (LDA) and Emergency Lane Keeping Assist (ELKA)
LDA monitors lane markings and provides three levels of intervention:
- Lane Departure Warning (LDW): Visual and audible alert when drifting without indicating
- Lane Departure Assist (LDA): Gentle steering correction to guide the car back
- Lane Departure Prevention (LDP): Stronger corrective steering to prevent departure
ELKA goes further. It operates between 50 and 150 km/h and activates the EPS system to provide reverse torque when the vehicle drifts toward solid lane lines, road edges, oncoming vehicles, or vehicles passing on adjacent lanes. The rear corner mmWave radars detect approaching vehicles from behind while the front camera tracks lane lines ahead.
- Toggle: ADAS > Driving Assist > Lane Support System (LSS)
- ELKA active icon: Flashes on instrument cluster
Blind Spot Assist (BSA) and Rear Cross Traffic
BSA is the Seal's umbrella system covering five rear-detection functions. All use the rear corner mmWave radars:
- Blind Spot Detection (BSD): Active 15-150 km/h. Warning indicator on the corresponding side mirror when a vehicle is in your blind zone. Flashes if turn signal is on.
- Rear Cross Traffic Alert (RCTA): Active while reversing below 15 km/h. Warns of approaching vehicles from the side.
- Rear Cross Traffic Braking (RCTB): Active while reversing below 9 km/h. Automatically brakes if collision is imminent.
- Rear Collision Warning (RCW): Active 5-146 km/h. Activates hazard lights if a vehicle behind is closing too fast.
- Door Open Warning (DOW): Detects approaching vehicles or cyclists when a door is about to open after stopping.
Traffic Sign Recognition (TSR) and Intelligent Speed Limit Control (ISLC)
TSR uses the front camera and navigation data to detect speed limit signs and display them on the instrument cluster. ISLC can automatically adjust your cruise speed to match the detected limit.
Full ADAS Feature Reference Table
| Feature | Abbreviation | Speed Range |
|---|---|---|
| Forward Collision Warning | FCW | 30-150 km/h |
| Automatic Emergency Braking | AEB | 4-150 km/h |
| Adaptive Cruise Control | ACC | 30-150 km/h |
| Intelligent Cruise Control | ICC | 0-120 km/h |
| Lane Departure Warning | LDW | 60-150 km/h |
| Lane Departure Assist | LDA | 60-150 km/h |
| Lane Departure Prevention | LDP | 60-150 km/h |
| Emergency Lane Keeping | ELKA | 50-150 km/h |
| Blind Spot Detection | BSD | 15-150 km/h |
| Rear Cross Traffic Alert | RCTA | Below 15 km/h (reversing) |
| Rear Cross Traffic Braking | RCTB | Below 9 km/h (reversing) |
| Rear Collision Warning | RCW | 5-146 km/h |
| Door Open Warning | DOW | Stationary |
| Traffic Sign Recognition | TSR | All speeds |
| Intelligent Speed Limit | ISLC | All speeds |
How to Enable or Disable ADAS?
- Driving features (ACC, ICC, LDA, ELKA): Touchscreen > ADAS > Driving Assist
- Safety features (BSD, RCTA, RCTB, RCW, DOW): Touchscreen > ADAS > Safety Assist
- Settings are saved between restarts. The car powers on with your last configuration.
ADAS Limitations
The Seal owner's manual documents these conditions where ADAS may underperform or fail:
- Weather: Heavy rain, snow, fog, or smog can block the camera and radars
- Glare: Direct sunlight, reflections, or oncoming headlights
- Tunnel transitions: Sudden light changes entering or exiting tunnels
- Lane markings: Faded, missing, or non-standard lines. Tree shadows on sunny days can mimic lane lines.
- Road boundaries: Grass, soil, or curb boundaries may not be detected
- Camera blocked: Dirt, ice, or fogged windshield disables camera-dependent features
- Metal guardrails: Certain metal structures can confuse mmWave radar detection
- Sensor damage: Loosely installed or displaced cameras and radars require dealer recalibration
Keeping your Seal's battery in top condition also helps ADAS sensors perform consistently. Low voltage can affect sensor accuracy. See our Seal battery life tips.
Common Mistakes Owners Make
- Treating ADAS as autopilot. Level 2 only. Hands on the wheel, eyes on the road, always.
- Testing AEB with objects. The manual warns against testing AEB with cardboard, dummies, or stationary objects.
- Ignoring sensor cleanliness. A dirty camera or mud-covered radar disables FCW, AEB, ELKA, and lane keeping entirely.
- Disabling AEB after a false alarm. This removes your most critical safety backup.
- Relying on BSD in heavy rain. Water spray from adjacent vehicles interferes with rear radar detection.
- Using ELKA on unmarked roads. ELKA requires visible lane lines. Without them, the system cannot function.
The ADAS Quiz: Do You Use All the Features?
Most Seal owners only use ACC and never explore BSA, ELKA, or ISLC. Count how many of the 15 features in the reference table above you have actually tried. If you are under 10, spend a weekend enabling and testing each one in a safe environment. Your car is smarter than you think.
Your Seal also has capabilities beyond ADAS worth exploring, including V2L for powering appliances directly from the car.
While your Seal's electronics keep you safe on the road, bydaccessories.store stocks model-specific screen protectors, dashboard covers, floor mats, and interior accessories to keep your cabin as sharp as your ADAS display.