For what it's worth, I used my own code reader on it, didn't show any codes. Wasn't aware that old fluid was ever an issue (never ran into that before) but at 160k that's certainly worth a shot, especially since I still don't feel any abnormalities with the brakes. I do still wonder about an electrical glitch, though, since at one point yesterday the lights were off after start-up, then came back on after the next start. Thanks.