No. plate is the first thing to change, so tell some specific mark or thing on it which differenciate it from others.
If ur uncle have good contacts in Sarhad police, request them to check it in area's like Noshera, Charsadda, Peshawer etc. Normally theft cars sell out over there.
Normally in case of snatching, robbers dont take it far away as afraid of police check posts (becoz they know owner normally informed police well in time), and then they wait for suitable time. So request police for Chappa's in near expected area's.
For precautionary measures, every one must have tracker for safety. I am not saying its 100% recover ur (problem in case of jammers only, but tracker company offers Anti-jammers also) car but probability of recovery increased. If ppl spend millions on car cost then i think 30K-40K worth for its safety.
yes miracles obviosly happens, yesterday my uncle told me that his friends car was stolen from house and after many days they recognized it on one CNG station, they call the police immediatly and get their car back, they person in that car told that he bought this car from Charsadda some days back for 5.5 Lac, and the car was Corolla 05 or 06,,,,,,,,,,u ppl know the actual worth of this model. Now police arrange a team to pick that gang from charsadda.
Also 7 cars were stolen from one area of islamabad and last car had tracker, due to which police recover the 7th car from some muzaffat of noshera, catch the gang and recover remaing 6 cars also.
May ALLAH helps your uncle to get car back.