Thanks Haaziq! I do understand the importance of warranty especillay with the kind of build quiality our local cars have these days. that's why i was asking for any non-intrusive
workarounds
the best i could have thought of is a battery powered mini wifi ip cam installed/ pasted around number plate and connected over wifi to your phone. i have tried this at home but yet to find a good enough cam for car. couple of options available on Daraz/ AliExpress but not too sure of their output quality