Wiring problems of the 2008 Toyota Scion Xd

I, like many others located in cold climates, seem to have had the same problem. While attempting to stop an odd grinding, something-engaging, motorized sound come from the brakes followed by very soft, extended braking and the 'abs' and 'brake lights' coming on. During the cold months, the lights simply never go off and this issue happens sporadically. Now that it is warmer, the lights are on and off all the time and the sounds and grinding happen a dozen times over the course of a 15 mile drive. I've learned to expect it and as soon as I hear the engaging noise while in motion; I know the braking may become difficult. The issue so far has disappeared every early-summer only to return, as expected, every late-fall. It first began several years and continues to occur. From what I have read, this appears to be an issue regarding faulty rear-hub sensors and/or wiring harnesses, and they are not isolated incidents. Toyota/scion is surely aware of this problem. The problem is I don't have upwards of $1200 to fix this issue, and I don't believe it falls upon me to do this, either. It's a clear manufacturing/part defect and it really would be great if Toyota/scion stepped up and were proactive becuase this issue will get someone seriously hurt or killed, if it hasn't already.