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 worst 2005 BMW 525I problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Airbags22
- Seat belts7
- Seats6
- Electrical4
- Transmission4
- Brakes1
- Engine1
- Fuel system1
- Lights1
- Steering1
Specific symptoms reported on the 2005 BMW 525I
Recalls
No recalls on record for this model year.
Defect investigations
Bmw airbag light illumination
Bmw is conducting a safety recall campaign on approximately 200,000 my04 through my06 subject vehicles built through 11/30/05 to correct the front passenger seat air bag occupant detection mat. The specific vehicles included in the recall aremy04- 06/ 5-series with standard and sport seats, my04-06/ x3-series and my06/ 3-series with sport seats. In addition, bmw will extend the warranty coverage of the passenger seat air bag occupant detection mat to 10-year/unlimited mileage on approximately 120,000 remaining my04-06 subject vehicles built through 11/30/05. The specific vehicles included in the extended warranty are my 06/ 6 series, my 06/ 3-series with standard seats, my04-05/ z4, my04-06/ 7 series, my 06/ x5, and my04-06/ 5-series with comfort seats.the average frequency of failures among the extended warranty groups was less than 1/7th of the recall vehicle groups.please see bmw's 08v‑384 recall notification for further detailsdepending on seat configuration and vehicle geometry, the occupant detection mat can fatigue during use depending on the manner and frequency of the front passenger's entry and exit.specifically, over time, micro-cracks could develop in the side flanks of the mat causing a broken circuit.a brokencircuit can lead to the deactivation of the passenger air bag and the illumination of both the air bag warning light and the passenger air bag light.
EA08001
Bmw airbag light illumination
In certain my 2005 through my 2006 bmw vehicles, the occupant classification system (ocs) for the passenger frontal airbag may malfunction and render the passenger airbag inoperative.in june 2006, bmw issued a technical service bulletin (si b 72 02 06) regarding the illumination of the airbag warning light and the passenger airbag status lamp.illumination of these lights warn that an open electrical circuit may be present within the passenger seat mat sensor.when both of the lights are illuminated, the passenger frontal air bag will not deploy in a frontal crash.certain bmw vehicles in addition to the subject vehicles contain the same seat mat sensor.these are the my 2004 5-series, 7-series and x3, the my 2004 through 2006z-4 series and my 2006 3-series, 6-series and x5 vehicles.an improved seat mat sensor was introduced in december 2005 for the mid-my 2006 production.in response to odi's information request letter, bmw provided 1,172 owner reports and 28,238 warranty claims.initial review of the data indicate that 280 non-duplicating owner reports and 13,051 non-duplicating warranty claims may be related the subject defect issue on the subject vehiclesthis preliminary evaluation is being upgraded to an engineering analysis (ea08-001).
PE07045
Technical service bulletins for the 2005 BMW 525I 53
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- The basic conditions for initializing the power windows are not met.
- The electrical system of BMW vehicles has been subject to an ongoing development process over the last few...
- Engine will crank but not start
- Customers may state that the alarm system (DWA) is not active after locking their unoccupied vehicle
- Diagnosis of Compound Brake System Complaints in M Vehicles: 1. Visible cracks are caused by high thermal...
- Discharged Battery Energy Diagnosis Must Be Performed: The electrical system of BMW vehicles has been...
- Power Reduction FC2A82 Intake VANOS and/or FC2 A87 Exhaust VANOS Camshaft Fault: The "Service Engine Soon"...
- Various Electrical Problems Caused by Water Ingress
- Navigation system: reporting missing or incorrect road map data
- Front passenger seat occupancy (OC3) mat for SRS: limited warranty extension to 15 years/unlimited miles
2005 BMW 525I fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 2.5L 6‑cyl | RWD | 17 | 26 | 20 |
What 2005 BMW 525I owners say
Most recent owner complaints, unedited.
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 the federal safety agency 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.
My car has a gas smell even in the inside smells like gas
After having an independent mechanic scan my vehicle with an advanced scan tool, the error that came up was for the "passenger seat occupancy sensor". This fault has caused both the airbag and seatbelt light to reman illuminated continuously. The first time it happened, I had the code reset. But after a person sat in the passenger seat, the error code came back with the same fault code.
Front passenger seat occupancy sensor has failed. Rear left hand brake/backup light is problematic and intermittently works, usually only shows up on car's dashboard while in reverse, but sometimes will stay on-screen during driving. Front ashtray outlet/cigarette lighter doesn't work.
Passenger restraint system fault.
Sunroof drain clogged into trunk causing fire in battery compartment and spare tire area. Vehicle was stationary in shop after not being run for hours.
Tl* the contact owns a 2005 bmw 525i. The contact stated that the vehicle decelerated independently while being operated at low speeds. The air bag warning indicator and service transmission warning indicator illuminated. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 130,000. Updated 02/16/17
Tl* the contact owns a 2005 bmw 525i. The contact stated that while driving at an unknown speed, the fault in passenger restraint system displayed on the instrument panel. The vehicle was taken to the dealer where it was diagnosed that the front passenger side air bag sensor needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and stated that the VIN was not included in the federal safety agency campaign number: 08v384000 (air bags). The failure mileage was 115,712. Updated 04/22/16*lj
Compare the 2005 BMW 525I
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Questions about the 2005 BMW 525I
Is the 2005 BMW 525I reliable?
Owners have filed 35 complaints about the 2005 BMW 525I, close to a typical 525I model year.
What is the 2005 BMW 525I year score?
The 2005 BMW 525I scores 72 out of 100 (average). The score compares it with the other model years of the BMW 525I: 75 is a typical year, 50 means twice the usual complaints, and serious complaints and recalls lower it.
What is the most common problem with the 2005 BMW 525I?
Airbags, with 22 complaints, typically around 86,000 miles. Next is seat belts (7).
How many recalls does the 2005 BMW 525I have?
No recalls on record.
What year does the BMW 525I have bad airbags?
The BMW 525I model years with the most airbags complaints are 2006 (44 complaints), 2004 (33 complaints) and 2007 (25 complaints).
What gas mileage does the 2005 BMW 525I get?
Official estimates for the 2005 BMW 525I range from 20 mpg combined. The most efficient version (2.5L 6-cyl, RWD) gets 17 city and 26 highway.
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