Dang! Went out for my first ride on the '03 LT and no servo assist. You have to crank on either the front or back brake to get any stoppage at all. I cycled the ignition - no luck. When you turn on the key, you get the 4hz flash and never get to the 1hz flash. I'm pretty sure this means the self-check never completes and that means a significant problem with the servo assist pump. You never hear the initial kick-in of the servo during the self test as you do with my other BMWs. My owner's manual describes this condition (warning light general OFF, warning light ABS/brake failure flashes at 4hz) as only residual braking function available in both circuits /self diagnosis not completed) and that is the case. I read the historical files and current posts and resolution is all over the map, from it fixed itself to new pads to add fluid to reset at the dealer to new battery. I charged my battery (BMW brand) to full charge - no luck. I did a preliminary check of all reservoirs, including under the seat and all seem to be above minimum. I know that a small amount makes a big difference, so I'll pull the plastic and check the rear reservoir closely. But I'm afraid that this means a trip to the dealer. Luckily, I bought an extended warranty (I say luckily, we'll see how it works out) so if the pump unit is out maybe I'm OK. I'll keep you posted on outcomes.