If you have a relatively new garage door opener, you may need to buy a repeater to work with vehicles older than 2010. I had to buy one for my opener when I installed the new Chamberlain garage door opener in February of 2016. The part is called Homelink Repeater, at cost about $25.00. I bought the opener at Home Depot, they knew about the repeater but did not carry it in the local store. I had to order it direct from Chanberlain. The part comes with instructions but you still need to follow the programming instructions found on pages 2-30 thru 2-34 of your owners manual. If you do not have an owners manual, PM me your EMAIL address and I will scan those pages and send them to you.