My (3 buttoned) key fob use to work with my Vauxhall Vectra (2003). However, after a struggle with the immobiliser, I would get a PADLOCK through CAR symbol on my dashboard. I opened the case and went ...

GREENSBORO, N.C. — Look in your pocket, purse, bag, or junk drawer, and chances are you’ll find a key fob. The basic ones lock and unlock your car’s doors. The fanciest do much more.