Which parts fail
Components named in complaints (front, side and curtain air bags, sensors and inflators).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2004 BMW 525i owners, lightly cleaned up (personal details are redacted by NHTSA).
Tl* the contact owns a 2004 BMW 525i. The contact stated that the passenger restraint system, fault in passenger restraint system affecting air bag, and belt tensioner/belt force limiter warning lights were continuously illuminated. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and informed the contact about NHTSA campaign number: 08V384000 (air bags); however, the statute of limitation surpassed and the vehicle was no longer eligible for the repairs. The approximate failure mileage was 118,000.
Tl* the contact owns a 2004 BMW 525i. While driving at an unknown speed, the "passenger restraint system fault" message displayed and the passenger side air bag sensor illuminated. The vehicle was taken to an independent mechanic who diagnosed that the passenger side air and restraint systems were faulty. The vehicle was repaired, but the failure recurred. The manufacturer was notified. The vehicle was not diagnosed or repaired again. The manufacturer was not notified. The failure mileage was 47,000.
Passenger restraint system warning appears each time we get into the vehicle and start the ignition. Airbag deployment red icon constantly illuminated on the dashboard. The air conditioning system is not working properly. The car does not cool or get cold until the car is in motion. We had a mechanic who we purchased the car from 3 years ago to diagnose the problem but it still continues to not cool properly.
I own a 2004 BMW 525i and the passenger side airbag and seat belt sign came on few weeks back. The dealer says its not covered but NHTSA site indicates it is covered on BMW 525i 2004 vehicles. This dealer is estimating a $650.00 diagnostic fee to see what need to be done. What can be done to get the passenger side air bag sensor fault issue? My last option is the junk yard, and never buy a BMW.
Tl* the contact owns a 2004 BMW 525i. While driving various speeds, the air bag warning light was constantly illuminated. The vehicle was taken to a dealer where it was diagnosed that the passenger side seat sensor failed and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 116,799.
I experienced a rough idle while parked or stopped at light. Independent mechanic said there was a vac leak associated with the brake vac pump which could cause brake damage and/or failure. BMW stated that the recall for this problem was VIN specific. #2 passenger restraint and air bag lite are on, same answer from BMW.
1) we purchased the vehicle used, with no problems. While traveling, we got out of the vehicle and when we got in, we noticed that a airbag light and seatbelt light were indicated on the instrument panel (red fault lights). Since the vehicle has the BMW I-drive we also noticed the warning that "there is a malfunction in the passenger restraint system, keep seatbelt fastened, and see BMW service center" or very close to this. 2) I assume that since there is this error, the passenger side airbag is disabled by the ECM. Part of the reason for buying the vehicle was for its safety, and the consequences of us not having an airbag available should there be a crash could be catastrophic. We are living in Germany supporting the us, and am not sure of the right way to get this issue resolved. …
The passenger side air bag warning light is on and will not turn off. I have called the BMW dealership and they stated that they would have to run a diagnostics test which will cost over $100 just to find out what is wrong with it. They stated that my VIN number was one of the cars that was fixed in a previous recall for the same issue. I told them I do not have the money to pay to see what is wrong it. What if the passenger airbag fails and someone is actually injured do to this issue. The warning notification on the dash has been on for two years. The car currently has 80,000. I don't understand why the same issue happens for a previous recall and they cannot take ownership of the recall. Very disappointed. The car has a very high price tag and you would expect some sort of ownership and honesty from the BMW corporation.
Since I have purchased the car in 2005 (with only 14,000) I am having problems with the passenger air bag and seat belt mat sensor of my BMW 2004. I brought it to the dealer for service. It was serviced. Right after the warranty expires with over 50,000 miles, I have the same problem. I went online to the BMW of north America website and there's a recall for car (same model and year as mine) but, they said mine is not included. I went to this BMW forums and I realized I am not the only one suffering this consequences. (go to google and type e60 BMW recall ) some of them recalled having reported this issue to you guys before. This is a safety device that goes inside the passenger seat and senses by weight activate or deactivate the airbags in the event of an accident.
Tl contact owns a 2004 BMW 525i. The contact noticed that the air bag warning indicator consistently illuminates on the instrument control panel, which indicates that the passenger air bag is inoperative. As a consequence, the front passenger side air bag would not deploy evenly in the event of a serious crash. The manufacturer stated that the VIN was not included in NHTSA campaign id number 08V384000 (air bags:frontal); therefore, he is not entitled to a free remedy as referenced in the recall. The vehicle has not been repaired. The failure and current mileages were 67,000. Updated 2/23/09 the consumer stated the dealer fixed the vehicle as a goodwill gesture. Updated 02/25/09.
NHTSA 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.
Airbag complaints in other 525i years
Frequently asked questions
How common are airbag problems on the 2004 BMW 525i?
NHTSA has 33 complaints about the air bags of the 2004 BMW 525i, 39% of the model year's 84 complaints. The component named most often is frontal (6 mentions).
Is there a recall for 2004 BMW 525i airbag problems?
No. NHTSA lists no air bags recall for the 2004 BMW 525i. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2004 BMW 525i airbag problems start?
Half of the complaints with a recorded mileage happened before about 95,000 miles, and 4% before 25,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.