2006 BMW X5 service brakes problems

“The brake vacuum pump has leaked a small amount of lubricating oil into the hose. This contamination resulted in a loss of power assist braking. The loss of power assist in braking has increased stopping distance and lead to a near vehicle crash. No indicator lights were present. Repair: Replacement of the brake vacuum line with one that contains a check valve, eliminating the possibility that oil will reach the brake booster; as well as the brake booster and brake master cylinder will also be replaced.”

“TL* THE CONTACT OWNS A 2006 BMW 5 SERIES. THE CONTACT STATED THAT THE VEHICLE LEAKED OIL AND THE BRAKES FAILED WHILE DRIVING AT LOW SPEEDS. THE BRAKES WORKED NORMALLY WHEN APPLIED AT HIGH SPEEDS. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO DIAGNOSED THAT A NEW POWER BRAKE BOOSTER AND VACUUM PUMP NEEDED TO BE INSTALLED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND DID NOT ASSIST. THE DEALER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS 104,932. *DT”

“THE BRAKES PEDAL BECOMES HARD AND IS UNABLE TO STOP VEHICLE. THIS OCCUR WHILE THE VEHICLE IS MOVING. IN ADDITION THE BRAKE PEDAL IS HARD WHILE STATIONARY AS WELL”

“I PURCHASED A 2006 X5 4.4I (N62B44 ENGINE)USED WITH 138,000 MILES. WENT TO LEAVE DRIVEWAY, CAR WAS IN REVERSE, PRESSES BRAKES TO ADJUST MIRRORS, LET OFF TO KEEP BACKING OUT, HAD TO PRESS AGAIN FOR ANOTHER ADJUSTMENT, I LOOKED UP AND I WAS DRIVING THROUGH THE BUSHES IN MY FRONT YARD. BRAKES WERE PUSHED BUT NOT ENGAGING. I THOUGHT THAT TO BE ODD, SO I WANTED TO RUN TO A CERTIFIED BMW REPAIR FACILITY. I WAS IN TRAFFIC GOING ABOUT 40 AND HAD TO UTILIZE THE BREAKS AGAIN, THE CAR STOPPED. WITHIN ONE MINUTE I HAD TO PRESS AGAIN AND THE CAR WOULD NOT STOP, I PUMPED THE BREAKS AND THE PEDAL WAS SO HARD THERE WAS NO GIVE. I PLOWED THROUGH A RED LIGHT ALMOST CAUSING A SEVERAL CAR PILE UP, AND WAS FINALLY ABLE TO GET THE VEHICLE TO STOP. AT THE REPAIR SHOP, I WAS TOLD THE VACUUM PUMP WAS LEAKING OIL EVERYWHERE BECAUSE IT WAS BUSTED, THE OIL WAS BACKING UP INTO THE MASTER CYLINDER AND HAD MIXED WITH THE BREAK FLUID AND THE BREAK BOOSTER WAS BAD. I AM HAVING TO PAY 2400 FOR THE SERVICE WHEN IT WAS JUST PURCHASED 3 DAYS AGO. THERE WERE NO WARNING LIGHTS ON AT TIME OF PURCHASE WHICH WOULD HAVE KEPT ME FROM PURCHASING WITH CASH. THERE ARE STILL NO WARNING LIGHTS ALTHOUGH I HAVE…”

“SUDDEN LOSS OF BRAKE FUNCTION AND LEAKING BRAKE FLUID DURING NORMAL WEATHER AD ROAD OPERATIONS. AFTER DOING RESEARCH THERE IS A LARGE GROUP OF SIMILAR YEAR MAKE AND MODEL WITH THIS SAME ISSUE.”

“BMW X5 BRAKE BOOSTER FAILED. I WAS DRIVING IN TOWN AND ATTEMPTED TO STOP AND NOTICED THAT THE TRUCK NEEDED MORE BRAKE PEDAL PRESSURE THE LONGER I APPLIED THE BRAKES. THE PEDAL BEGAN TO RISE AND THE TRUCK WOULD BEGIN TO CREEP FORWARD UNLESS MORE PRESSURE WAS APPLIED TO THE PEDAL. I DROVE TO THE BMW DEALERSHIP TO HAVE A RECALL PERFORMED ON THE PASSENGER SEAT OCCUPANCY MAT. DURING THAT VISIT I INFORMED THE SERVICE WRITER OF THE BRAKE ISSUE AND ASKED IF IT WOULD BE CORRECTED UNDER A RECALL AS WELL. I WAS TOLD THAT MY VEHICLE WAS NOT COVERED BY ANY OTHER RECALLS. I RESEARCHED IT AND FOUND THAT SOME BMW X5'S WE'RE EXPERIENCING SOME ISSUES WITH THE BRAKES AND WERE BEING RECALLED BUT NOT MY VEHICLE. I ORDERED ALL NECESSARY PARTS AND REPLACED THEM MYSELF. WHICH CONSISTED OF A NEW UPDATED PUMP, ALL UPDATED OEM LINES WITH CHECK VALVES AND A NEW TRW OEM BRAKE BOOSTER. RESEARCH SHOWS THAT ENGINE OIL VAPOR TRAVELS INTO THE LINES AND UP TO THE BOOSTER WHICH CAUSED THE RUBBER DIAPHRAM TO FAIL IN THE BRAKE BOOSTER. THESE ARE ALL THE SAME PARTS MENTIONED IN THE RECALLS ON OTHER BMW X5'S COVERED BY THE RECALLS.”