You'll also note that the standard Capacity 12 sensor package for vehicles have two cameras and two range finders, for front and back. Vehicles do not have the ability to 'turn their heads' so sensor placement is also important. The standard camera does come with a microphone so seeing in a particular direction and mono-channel hearing is not difficult with just one camera, but rarely are you in the position where that will be enough.
Based on the sensor package of the drone, I recommend (in order):
1 Camera (Rating 4 w/ Low-Light, Thermographic, Flare Compensation and Visual Magnification)
1 Rangefinder
1 Motion Detector
1 Radar
If the vehicle is large enough or unwieldy enough to not be able to turn without moving
1+ additional Cameras (enough to have all-round vision, usually 6 for a vehicle)
1+ additional Rangefinders (1 per camera)
1+ additional Motion Detectors (1 per vehicle face)
Once the vehicle and see, track, gauge distance and hear in all directions, the remaining sensor slots are based on what you need it for. Drones that scout for you should have Non-Linear Junction Detectors (Arsenal pg. 59), MAD detectors and chemsniffers to detect potential threats (maybe Radiation Detector too if appropriate). Vehicles (and drones that fight for you) should have whatever sensors needed to help with a TacNet system.