Description
The 66-31-5-B3A-D16 is a genuine BMW front radar sensor designed for select 2024–2025 BMW models featuring factory driver assistance equipment. This forward-facing electronic component monitors the area ahead of the vehicle, processing reflected radar signals to determine object presence and distance for compatible driving assistance functions.
Vehicle Compatibility
| Year |
Vehicle |
Engine |
Trims |
| 2025 |
BMW 228 Gran Coupe |
2.0L L4 Gas |
xDrive |
| 2024–2025 |
BMW 530i |
2.0L L4 Mild Hybrid Electric/Gas |
— |
| 2024–2025 |
BMW 530i xDrive |
2.0L L4 Mild Hybrid Electric/Gas |
— |
| 2024–2025 |
BMW 540i xDrive |
3.0L L6 Mild Hybrid Electric/Gas |
— |
| 2025 |
BMW 550e xDrive |
3.0L L6 Plug-In Hybrid Electric/Gas |
— |
| 2024–2025 |
BMW 740i |
3.0L L6 Gas |
— |
| 2024–2025 |
BMW 750e xDrive |
3.0L L6 Plug-In Hybrid Electric/Gas |
— |
| 2024 |
BMW 760i xDrive |
4.4L V8 Mild Hybrid Electric/Gas |
— |
| 2024–2025 |
BMW i5 |
Electric |
— |
| 2024–2025 |
BMW i7 |
Electric |
— |
General Specifications
| Condition |
New |
| Part Number |
66-31-5-B3A-D16 |
| Brand |
BMW |
| Part Type |
Front Radar Sensor |
| Years |
2024–2025 |
| Vehicle |
BMW 228 Gran Coupe, 530i, 540i, 550e, 740i, 750e, 760i, i5, i7 |
| Engine |
2.0L L4, 3.0L L6, 4.4L V8, Electric |
| Position |
Front |
| System |
Driver Assistance |
| Sensor Type |
Radar Distance Sensor |
| Function |
Forward Object and Distance Detection |
Product Features
The 66-31-5-B3A-D16 BMW front radar sensor is developed to support forward traffic monitoring through the vehicle's original radar-based assistance technology:
- Scans the roadway ahead using transmitted and reflected radar waves
- Determines the distance to detected vehicles and other objects
- Designed for the specified front sensor installation position
- Communicates forward detection measurements to compatible vehicle control electronics
- Supports the operation of factory-equipped radar assistance functions
- Connects through the designated electrical interface and mounting arrangement
- Suitable for specified BMW combustion engine, hybrid, and electric models
Application Notes
The 66-31-5-B3A-D16 is intended for select 2024–2025 BMW 228 Gran Coupe, 530i, 530i xDrive, 540i xDrive, 550e xDrive, 740i, 750e xDrive, 760i xDrive, i5, and i7 vehicles equipped with the corresponding front radar system. Proper installation requires checking sensor placement, electrical connections, and any necessary alignment, calibration, or vehicle-specific electronic programming.
Always confirm the vehicle VIN, original front radar sensor number, mounting compatibility, and BMW calibration requirements before installation.