Park assist replacement

I'm getting ready to sell off my '17 taco and need to replace one of the parking assist sonars.it was apparently damaged from an accident a little over a year ago and I never noticed it till I accidentally hit the button and turned it on. How hard is it to replace myself as the dealership wanted 1k for the part and 600 to calibrate. I looked at a old thread and found the part. They want a nice markup lol.

https://parts.toyota.com/p/toyota__/Parking-Aid-Sensor/69104448/893410R060.html

 

Damned crooks.

 

The park assist is almost no use to most drivers. I know people that turn it off in their cars because they have a rear camera and the beeping annoys them.
Good luck.