It has worked great, i seen people saying it broke quickly but I've been wearing mine on my belt and sat on it a few times and it hasnt broke. My factory one was completely toast. Makes sense I guess being from 2005. But this one might be a lesser quality plastic but for the price, I will keep buying these! My internals fit right in, you need to slide the little plastic square ring over your key part and then pop it into the plastic housing. In the correct direction. If all done right, this thing works. I had to figure it out on my own and if you don't get the little plastic piece over your existing key and in the right direction it will not go together. If done correctly I've had no issues and highly recommend over spending a small fortune at the dealer!