Do you guarantee these keys/remotes to work?

Yes!  We guarantee our keys and remotes 100%.  If you are unable to program your keys or remotes using the instructions we provide, you can call us 9 AM to 5 PM EST at 1-866-595-9596 or e-mail us at support@autotransponder.com for support.  We have a money back guarantee, even if the keys are cut. All keys and remotes come with a 3 month warrantee.