Okay, I am getting frustrated. My keyless remotes started showing signs of tired batteries (as they should, after 4 years) so I got some new batteries- high quality, correct number, etc. When I replaced the batteries, the remotes wouldn't work. So- checked the manual, which basically sez you have to "synchronize" with the control unit by pressing either the lock or the unlock button 6 times. No problem, I can do that! Didn't work. I have tried various combos of engine off, engine on, inside the car, outside the car, but nothing seems to make it work. I don't want to reprogram, since I use two remotes and the other one works fine. If I put the old battery back in, works fine. I have been thru this exchange several times, to no avail. Anybody know what I need to do?? The batteries check out fine with a VOM, and some of the same batch work fine in my wife's Honda remote, which I replaced at the same time.