A faulty brake master cylinder reservoir filter can cause the brake system indicator to illuminate after a cold start and then go off. Replacement of the reservoir filter will commonly fix this problem.
Average mileage: 124,922 (75,000–172,000)
17 people reported this problem
Brake indicator comes on every cold morning. Letting the car warm up turns the indicator off. It's been to several mechanics and yes it can be fixed, but if the light doesn't bother you (I personally couldn't care less) then as the mechanics said it doesn't really effect anything. My cars up to 125,000 no issues other than routine maintenance. If a sensor is all I have to worry about I call that solid construction.