I ordered a MF switch from Rockauto and they sent me the wrong #. Mine is a 98 F150 4.6. I searched their site using the # off the old one and it came up with a different number. It was pretty comical when I installed the first one and reconnected the battery- wipers came on and wouldn't shut off, no signals, etc. Well, it wasn't funny at the time, but since I got the right switch pretty quickly and the job is fairly simple I wasn't too upset. I can laugh about it now, but used some pretty foul language at the time!