Audi A3 both remotes not unlocking... Fault finding and repair.

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The owner of the car, was told that he needed new remotes... strange enough, both lock, open the boot, but both fail to unlock the car... what at the start you would easily assume was a car issue, revealed to be an interesting coincidence!
Follow me on this video to find out what the problem was, and how to resolve it.
Flux used: NC-559-ASM-UV
rover.ebay.com...
To clean: Isopropyl Alcohol
rover.ebay.com...
Remote Tester:
rover.ebay.com...
Hope you enjoy the video.
Any questions or comments put them below.
Like always, thank you for watching!