What I Did
I have an 03 as well. I first started having a key problem in 05 or so. I bought the remote entry kit with fobs from H and A for about $100. Less than 5 minutes to install, and I have never used a key in a door since. I have had no problems with the ignition. I am only trying to point out that while there may well be a problem with the locks, there is a workaround to reduce the irritation.
I have an 03 as well. I first started having a key problem in 05 or so. I bought the remote entry kit with fobs from H and A for about $100. Less than 5 minutes to install, and I have never used a key in a door since. I have had no problems with the ignition. I am only trying to point out that while there may well be a problem with the locks, there is a workaround to reduce the irritation.