2005 BMW 525I — Problems, Recalls & Safety Data

I am encountering persistent issues with my 2005 BMW 525i. Despite having replaced several critical components, including the ignition coils, spark plugs, mass air flow sensor, and throttle body sensors, the vehicle continues to experience performance problems, specifically failing to advance beyond the fourth cylinder when driving uphill. After conducting numerous diagnostic tests, I have concluded that there may be an air leak in the intake manifold. Additionally, after prolonged use under these conditions, the positive battery cable from the trunk has shown signs of overheating, evidenced by smoke, which I suspect is related to repeated uphill driving. While the vehicle performs adequately on flat surfaces, it exhibits hesitation and jerking once it surpasses the fourth cylinder.

I am encountering persistent issues with my 2005 BMW 525i. Despite having replaced several critical components, including the ignition coils, spark plugs, mass air flow sensor, and throttle body sensors, the vehicle continues to experience performance problems, specifically failing to advance beyond the fourth cylinder when driving uphill. After conducting numerous diagnostic tests, I have concluded that there may be an air leak in the intake manifold. Additionally, after prolonged use under these conditions, the positive battery cable from the trunk has shown signs of overheating, evidenced by smoke, which I suspect is related to repeated uphill driving. While the vehicle performs adequately on flat surfaces, it exhibits hesitation and jerking once it surpasses the fourth cylinder.

I am encountering persistent issues with my 2005 BMW 525i. Despite having replaced several critical components, including the ignition coils, spark plugs, mass air flow sensor, and throttle body sensors, the vehicle continues to experience performance problems, specifically failing to advance beyond the fourth cylinder when driving uphill. After conducting numerous diagnostic tests, I have concluded that there may be an air leak in the intake manifold. Additionally, after prolonged use under these conditions, the positive battery cable from the trunk has shown signs of overheating, evidenced by smoke, which I suspect is related to repeated uphill driving. While the vehicle performs adequately on flat surfaces, it exhibits hesitation and jerking once it surpasses the fourth cylinder.

The tail-lights have gone out creating safty issue and number of warning lights to come up on the dashboard. Dealership stated that the wiring harness around ground wire has melted. They stated that this is same issue that is mentioned under NHTSA Campaign Number: 13V407000. The service advisor said that his issue would be fixed by same service bulletin SIB 630613, however my date range is not included in the recall. I would like to report an issue to open a case and extend the recall to include all E60 models from 2004 to 2010. Would you please open an investigation into this matter and contact me for additional information and photos.

I PURCHASED THIS BMW 525I USED FROM A PERSON THAT OBTAINED IT FROM A WHOLESALE DEALER, IT HAD SOME MINOR FRONTEND DAMAGE FROM A FENDER BENDER (BROKEN GRILL, DING TO HOOD) SHOWING 107900 MILES. EVERYTHING ELSE CHECKED OUT. I FEW MONTHS LATER I NOTICED A SLIGHT CHANGE IN TRANSMISSION SOUND, BUT IT MIGHT HAVE BEEN DUE TO THE COLD TEMPERATURES HERE IN WISCONSIN. A COUPLE OF DAYS LATER WHILE JUST FINISHING GOING UP A SLIGHT STRAIGHT INCLINE AT AROUND 45MPH THE TRANSMISSION DROPPED DOWN INTO LIMP DOWN MODE AND A TEMPORARY NOTICE CAME UP ON THE COMPUTER SCREEN INDICATING A TRANSMISSION PROBLEM. STOPPING AND RESTARTING THE ENGINE CLEARED THE PROBLEM, THE NEXT DAY NEAR THE SAME SPOT IT OCCURRED AGAIN. I ASSUMED THE TRANSMISSION MIGHT BE LOW ON FLUID BUT LOOKING ONLINE BMW INDICATED THIS IS A NO SERVICE TRANSMISSION BUT THAT IT IS POSSIBLE TO CHECK THE FLUID LEVEL BY ACCESSING A PLUG UNDER THE CAR. WHEN A SERVICE TECH CHECKED HE SAID THE FLUID LEVEL WAS NORMAL BUT SMELLED BURNT. HE RECOMMENDED AGAINST ANY SERVICE IN THAT IT LIKELY WOULD RESULT IN FASTER COMPLETE FAILURE. THE PROBLEM HAS NOT REOCCURRED AND NO CODES SHOW IN THE SYSTEM FILE, IN THAT BMW INSISTED ON NO PROVIDING A METHOD TO CHECK THE TRANSMISSION FLUID, THEY ASSUMED THE LIABILITY FOR FAILURE IF REGULAR MAINTAINANCE (TRANSMISSION FLUSH) COULD HAVE PREVENTED THIS FAILURE.