One problem related to brake master cylinder has been reported for the 2003 BMW 745. The most recently reported issues are listed below.
The contact owns a 2003 BMW 745li. The contact stated that he received a recall notice, not listed on the NHTSA site, in reference to the piping and brake master cylinder. The recall notice stated that the dealer was to replace the brake vacuum pump but they did not. The vehicle was repaired and all other components except for the brake vacuum pump were replaced. The failure mileage was approximately 68,800.