You have the right to choose your repair shop. Your insurance company can not require you to go to a particular repair facility.

That having an accident can Null your Vehicles Warranty.

A car is considered "totaled" by insurance companies if the vehicle's overall damage in 80% or greater

Unibody cars require more re-enforcement than Rigid-Chassis Vehicles

You have the right to choose your repair shop. Your insurance company can not require you to go to a particular repair facility.