any accessory shop can recommend cheap n good pricing

which state?

install urself

im in kl.

i watched youtube.. looks easy tho. but it require to peel the back break cable . does this void warranty? some say add an extra socket but how ?

i also finding
any accessories shop got do help install service
how much will they charge ?

Done that before on my Premium X. The main point to look out for is the location for the camera wire to go inside the boot. My installer route the wire through the license plate light causing one of the clip to broke off and not getting a good seal.
Thus I reroute the wire myself through the Perodua Logo "White Colour Insert" by drilling it through. This method require the removal of the rear Chrome garnish and only applicable for camera with the small 4/5 pin connector.

buy from lazada, and warranty don't void.

you will have to cut the wire for reverse sensing. unless u diy without cutting the cable. those abeng shops will just splice cable to install. possibly void warranty.