BRAKE BOOSTER IS LOOSING VACUUM WHEN SITTING OVER NIGHT CAUSING THE BRAKE PEDAL TO BE ROCK HARD AT STARTUP. THE BRAKES ARE FINE AGAIN AS SOON AS THE CAR STARTS. I KNOW THAT THE E65 FROM THE SAME YEARS HAS A RECALL ON THE BRAKE BOOSTER VACUUM LINE AND CHECK VALVE.
2006 BMW 525I
Owner reports · Recalls · Investigations
Limited comparison data
There is not enough comparable history to draw a useful model-year comparison.
About this comparison →How this year compares
Owner complaints by model year
Compare all 525I years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
67 reports with mileage · 10 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Air Bags. Review the 44 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 8 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Electrical System. Review the 7 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes complaints
8 reportsBRAKES ARE NOT WORKING (STALLING) AFTER FULLY STOPPING AND REAPLYING BRAKE AT A LOWER SPEED. BRAKE PADEL IS BECOMING VERY HARD AND EVEN WITH ALL FOOT FORCE BRAKE PADEL IS NOT BEING DEPRESSED. I HAD MY KIDS IN THE CAR WHEN THIS HAPPENED. I READ IT ONLINE SIMILAR PROBLEM ACCURED IN OTHER BMW MODEL AND RECALL BULLETIN WAS ISSUED. …
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BRAKES ARE NOT WORKING (STALLING) AFTER FULLY STOPPING AND REAPLYING BRAKE AT A LOWER SPEED. BRAKE PADEL IS BECOMING VERY HARD AND EVEN WITH ALL FOOT FORCE BRAKE PADEL IS NOT BEING DEPRESSED. I HAD MY KIDS IN THE CAR WHEN THIS HAPPENED. I READ IT ONLINE SIMILAR PROBLEM ACCURED IN OTHER BMW MODEL AND RECALL BULLETIN WAS ISSUED. THIS ISSUE IS VERY SERIOUS AND I'M WILLING TO LET INVESTIGATORS CHECK MY VEHICLE IF THEY WISH TO CHECK OUT THE PROBLEM. THANK YOU [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).
TL* THE CONTACT OWNS A 2006 BMW 525I. WHILE DRIVING APPROXIMATELY 40 MPH, THE BRAKES FAILED. THE VEHICLE WAS SHIFTED INTO NEUTRAL AND TAKEN TO AN INDEPENDENT MECHANIC WHO DIAGNOSED THAT THE BOOSTER VACUUM WAS TURNED AT THE VACUUM PUMP CAUSING THE BRAKE PUMP TO LEAK OIL AND CONTAMINATE THE BRAKE BOOSTER. THE VEHICLE WAS NOT REPAI…
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TL* THE CONTACT OWNS A 2006 BMW 525I. WHILE DRIVING APPROXIMATELY 40 MPH, THE BRAKES FAILED. THE VEHICLE WAS SHIFTED INTO NEUTRAL AND TAKEN TO AN INDEPENDENT MECHANIC WHO DIAGNOSED THAT THE BOOSTER VACUUM WAS TURNED AT THE VACUUM PUMP CAUSING THE BRAKE PUMP TO LEAK OIL AND CONTAMINATE THE BRAKE BOOSTER. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 140,000.
TL * THE CONTACT OWNS A 2006 BMW 525I. WHILE DRIVING 40 MPH, THE VEHICLE BECAME DIFFICULT TO STOP WHEN THE BRAKE PEDAL WAS DEPRESSED. THE CONTACT HAD TO DEPRESS THE BRAKE PEDAL WITH GREAT FORCE IN ORDER TO STOP THE VEHICLE. THE VEHICLE VIBRATED PRIOR TO COMING TO A COMPLETE STOP. THE FAILURE OCCURRED REGULARLY. THE VEHICLE …
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TL * THE CONTACT OWNS A 2006 BMW 525I. WHILE DRIVING 40 MPH, THE VEHICLE BECAME DIFFICULT TO STOP WHEN THE BRAKE PEDAL WAS DEPRESSED. THE CONTACT HAD TO DEPRESS THE BRAKE PEDAL WITH GREAT FORCE IN ORDER TO STOP THE VEHICLE. THE VEHICLE VIBRATED PRIOR TO COMING TO A COMPLETE STOP. THE FAILURE OCCURRED REGULARLY. THE VEHICLE WAS BROUGHT TO THE DEALER FOR DIAGNOSTIC TESTING, BUT WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 90,000.
TL* THE CONTACT OWNS A 2006 BMW 5 SERIES 525I. THE CONTACT STATED THAT THE EMERGENCY BRAKE WOULD HAVE TO BE APPLIED WHEN ATTEMPTING TO BRAKE TO A COMPLETE STOP. THE BRAKES HAD NOT PROPERLY WORKED IN THE VEHICLE FOR AN EXTENDED PERIOD OF TIME AND THE CONTACT HAD TO APPLY THE EMERGENCY BRAKE IN DRIVE OR REVERSE BECAUSE THE BRAKES…
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TL* THE CONTACT OWNS A 2006 BMW 5 SERIES 525I. THE CONTACT STATED THAT THE EMERGENCY BRAKE WOULD HAVE TO BE APPLIED WHEN ATTEMPTING TO BRAKE TO A COMPLETE STOP. THE BRAKES HAD NOT PROPERLY WORKED IN THE VEHICLE FOR AN EXTENDED PERIOD OF TIME AND THE CONTACT HAD TO APPLY THE EMERGENCY BRAKE IN DRIVE OR REVERSE BECAUSE THE BRAKES WOULD NOT STOP THE VEHICLE WITH THE APPLYING FORCE. THE VEHICLE HAD BEEN TAKEN TO THREE REPAIR SHOPS WHERE IT WAS DIAGNOSED THAT THE POWER VACUUM PUMP NEEDED TO BE REPAIRED. THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN ID NUMBER: 10V446000 (SERVICE BRAKES, HYDRAULIC) BUT HAD EXPERIENCED THE FAILURE ON MULTIPLE OCCASIONS. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 80,000.
TL* THE CONTACT OWNS A 2006 BMW 525I. THE CONTACT STATED THAT WHILE DRIVING 20 MPH, HE APPLIED THE BRAKES BUT THE VEHICLE DID NOT DECELERATE. THE CONTACT PUMPED THE BRAKES FURIOUSLY UNTIL THE BRAKES RESPONDED. AN INDEPENDENT MECHANIC INSPECTED THE VEHICLE AND FOUND MOTOR OIL INSIDE THE BRAKE BOOSTER AND THE VACUUM PUMP. THE BRAK…
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TL* THE CONTACT OWNS A 2006 BMW 525I. THE CONTACT STATED THAT WHILE DRIVING 20 MPH, HE APPLIED THE BRAKES BUT THE VEHICLE DID NOT DECELERATE. THE CONTACT PUMPED THE BRAKES FURIOUSLY UNTIL THE BRAKES RESPONDED. AN INDEPENDENT MECHANIC INSPECTED THE VEHICLE AND FOUND MOTOR OIL INSIDE THE BRAKE BOOSTER AND THE VACUUM PUMP. THE BRAKE BOOSTER, VACUUM PUMP AND VACUUM PIPE WERE ALL REPLACED. THE FAILURE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE AND CURRENT MILEAGE WAS 78,300.
BRAKES BECAME HARD TO PRESS AND STOPPING TAKES MORE EFFORT ON THE BRAKE PEDAL. CONDITION LISTED AS RECALL 10V-446 BY BMW . *TR
TL* THE CONTACT OWNS A 2006 BMW 525-I. THE CONTACT STATED THAT THE VEHICLE WAS LEAKING OIL ONTO THE BRAKES BOOSTER, CAUSING THE VEHICLE TO LOSE BRAKE PRESSURE. THE VEHICLE WAS TAKEN TO THE DEALER WHO CONFIRMED THE FAILURE. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE WHO STATED THAT THE VEHICLE WAS NOT INCLUDED IN ANY RECALLS AN…
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TL* THE CONTACT OWNS A 2006 BMW 525-I. THE CONTACT STATED THAT THE VEHICLE WAS LEAKING OIL ONTO THE BRAKES BOOSTER, CAUSING THE VEHICLE TO LOSE BRAKE PRESSURE. THE VEHICLE WAS TAKEN TO THE DEALER WHO CONFIRMED THE FAILURE. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE WHO STATED THAT THE VEHICLE WAS NOT INCLUDED IN ANY RECALLS AND OFFERED NO ADDITIONAL ASSISTANCE. THE FAILURE MILEAGE WAS 125,000 AND THE CURRENT MILEAGE WAS 129,000.
Official recalls
319V273000 · Engine And Engine Cooling:exhaust System:emission Control:crankcase (pcv)
Apr 4, 2019
BMW of North America, LLC (BMW) is recalling certain 2006 525i, 525xi, 530i, 530xi, 530xi Sports Wagon, 325i, 325xi, 325xi Sports Wagon, 330i, 330xi, Z4 3.0i and Z4 3.0si vehicles. The heater for the positive crankcase ventilation (PCV) valve may short circuit.
Consequence & remedy
Consequence: An electrical short can cause the parts within the PCV valve to melt, increasing the risk of a fire, even when the vehicle is not in use.
Remedy: BMW will notify owners, and dealers will replace the PCV valve heater, free of charge. The recall began May 30, 2019. Owners may contact BMW customer service at 1-800-525-7417. Note: This recall is an expansion to recall 17V-683.
17V428000 · Air Bags:sensor:occupant Classification
Jul 6, 2017
BMW of North America, Inc. (BMW) is recalling certain 2006 325i, 325xi, 330i, 330xi, 525i, 525xi, 530i, 530xi, and 550i vehicles equipped with the Sport Seat option and certain 2006 525i, 525xi, 530i, 530xi, 550i vehicles with standard seats. The front passenger seat occupant detection mat that determines if, and how, the passenger frontal air bag should deploy in a crash may fatigue and develop cracks which could lead to a system failure.
Consequence & remedy
Consequence: Should the system fail, in the event of a crash, the front passenger air bag would be deactivated, increasing the risk of personal injury.
Remedy: BMW will notify owners, and dealers will repair the occupant detection mat to eliminate the possibility that it may crack, replacing it as necessary, free of charge. The recall began September 1, 2017. Owners may contact BMW customer service at 1-800-525-7417.
13V564000 · Air Bags:sensor:occupant Classification
Nov 12, 2013
BMW of North America LLC (BMW) is recalling certain model year 2006 325i, 325xi, 330i, 330xi sedans and 325xi sports wagons, model year 2007 328i, 328xi, 335i, 335xi sedans and 328i and 328xi sports wagons, model year 2006-2007 525i, 525xi, 530i, 530xi, 550i sedans and 530xi sports wagons, model year 2006 760i sedans, model year 2006-2007 750i, 750Li, and 760Li sedans, and model year 2006 X5 sports activity vehicles, equipped with certain seat types. The front passenger seat occupant detection mat that determines if and how the passenger frontal air bag should deploy in a crash may fatigue and develop cracks which could lead to a system failure.
Consequence & remedy
Consequence: Should the system fail, in the event of a crash, the front passenger air bag would be deactivated, increasing the risk of personal injury.
Remedy: BMW will notify owners with an interim notification letter in January 2014 since parts are not currently available. When parts are available, BMW sent a second letter in August and dealers will repair the occupant detection mat to eliminate the possibility that it may crack, free of charge. Additionally, owners of model year 2006-2007 3 Series with standard seats, 5 Series with comfort seats, and Z4 models, will receive an extended warranty on their front passenger seat occupant detection mat. Owners may contact BMW customer relations at 1-800-525-7417 or email BMW at CustomerRelations@bmwusa.com.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0No exact-year investigations in this snapshot.
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