A total of 3,912 BMW X5 crossovers from 2007-2010 are being recalled in Canada due to a check valve in the brake vacuum pump that may leak a small amount of lubricating oil.
Over time, this could contaminate the brake booster and affect brake power assist, increasing the risk of a crash.
BMW dealers will therefore inspect and, if necessary, replace the brake booster and master cylinder. Additionally, the brake vacuum line (including the check valve) will be replaced to eliminate the possibility of oil reaching the brake booster.
Source: Transports Canada