Three problems related to brake light on have been reported for the 2006 BMW X5. The most recently reported issues are listed below.
Brake lines corroded and ruptured with loss of brake fluid and decreased braking ability. Brake light came on after gentle braking on the road at low speed.
Brake warning light came on, went to my repairman who added brake fluid and said to watch for brake fluid spots on garage floor. Found spots coming from area behind front wheel on drivers side. Took it back for check and it was determined that line had rotted through. Hard to understand this was in enclosed protected area.
1. Brake light came on in 2006 BMW X5 on 8/1/10. 2. The vehicle was taken to BMW dealer to be repaired, on inspection they found "both front axle -cv boots split and spraying grease on brake calipers". The vehicle was repaired to BMW standard 3. On 8/11/10 the vehicle was in an accident- the brakes was sluggish and did not respond.