along with that...you might want to inspect all of the A/C hardlines (and rubber lines too) to ensure you don't have any damage on those too.I would check the A/C condenser for damage from accident. If the aluminum core got a hole in it, freon would leak out, and A/C will quit working.. nissan part is > $200.
The condensor is the aluminum looking canister in the front passenger side of the engine bay. You can follow the lines from there.
FYI, there is a high pressure and low pressure side. You may be able to procure a device that will allow you to messure the pressure in each side through the valves under the caps marked "L" or "H".