maxfli11

My wifes key fob quit on her a few weeks ago. I let her use mine since and it works fine. I replaced the battery in hers and it still would not work, so I thought it lost its programming. I used the procedure for nissans and everything went as prescibed, but when I pushed the lock button the hazzards did not flash but I heard a beep from the car. Key fob does not work still. Any ideas? Also the magic number for key insertions seems to be 8.