I have been installing Audiovox systems at work (Lexus). We used to install another brand called Guardian Alert,which was total garbage since the sensors kept going bad. The Audiovox systems have been working much better,we haven't replaced any sensors so far.
Wiring is fairly simple. For the control module you tap into the reverse light's positive wire and find a suitable ground. The sensors and beeper (or optional display) also plug into the module.
Mounting the sensors on the other hand requires drilling into your bumper. I put masking tape on the bumper,take a few measurements,mark the tape,then drill. We were given a special drill (basically a holesaw) to make the holes. A mounting sleeve is then pushed into the hole then the sensor snaps into the sleeve. Find a rubber grommet/body plug underneath your vehicle to run the sensor wiring into the vehicle and connect to the module.
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