That's what concerned me. I did see this but was worried when I read that the 'chirp' function may not work with all models. I am mainly buying for the 'chirp' so I'd like to go for something that I know will work for sure. I dont really care about the remote top part. If there are other solutions for a chirp for locking and unlocking, I would love to hear about it!

 

Stay by the car and make sure it locks prior to walking away. Cheap and doesn't void warranty.