The NHTSA and the IIHS have left the 4-Series alone so far. With no crash-test data, there's no sense as to whether it'll perform in a mediocre way, as the 3-Series has done.
The 4-Series has nice safety features beyond the usual, like an emergency notification system for first responders when the car is in an accident. Bluetooth comes standard, but BMW makes a rearview camera optional on base models, though their stickers run more than $42,000.
The rearview camera and parking sensors are options, but you may as well pay up for beautiful surround-view cameras and LED headlights. We'd buy the blind-spot monitors, too; they're bundled with forward-collision warnings, automatic emergency braking, and lane-departure warnings.
Other options include adaptive cruise control and automatic parking assist, which spins the steering wheel and pilots the car into a parallel parking spot.