Did you have only one? If you still have a second one, I would opt for the credit card fob that goes into your wallet. I have not carried the original around for over a year and a half. Extremely convenient as you just walk up and lock, unlock or start the car without ever thinking about where it is etc. now if you lose your wallet, can't help you there. Check out Sewell and if you are a Club Lexus member, you will get a discount.