Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2003 BMW 325i owners, lightly cleaned up (personal details are redacted by NHTSA).
On June 28,2024, after parking and turning off the ignition switch, the dash started smoking and within minutes the whole dash and front of car were on fire. The car almost completely burned to the ground before the fire department could get there. The car was recently serviced at a BMW for an air bag recall. Heater ducts were loose when returned. There are also recalls for the 2006 325i for similar dash fires. The cause could be either dealer work or a factory issue.
Tl* the contact owned a 2003 BMW 325i. The contact stated that while the vehicle was parked, it caught on fire. The fire department extinguished the fire. The contact stated that the fire arsonist investigator filed a report and provided a case number. The vehicle was not towed to a dealer and was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 120,000.
Tl contact owns a 2003 BMW 325i. The contact stated that the wiring harness for both tail lights have shortened out and melted. She is concerned that this failure could cause her vehicle to catch fire. The dealer stated that this is a common failure among the 2001-2003 models. The current and failure mileages were 57,200.
Both back windows on my 2003 BMW 325i will not go up. Garage says both regulators and actuators must be replaced. Researching the internet shows this to be a common failure on this model and it is considered a safety hazard.
BMW 325i rear blinkers shorted out causing electrical wires to burn. While driving my BMW a warning light on my console turned on indicating the left rear brake/blinker light(s) went out while at the same time I smelled wiring burning. I stopped the car and all my lights seemed OK, so I presumed it was a faulty sensor. A short while later while driving down the freeway I pulled into the left lane and really pissed the driver off behind me and nearly caused an accident. At this moment I noticed my left blinker was making a fast noise as though the left blinker bulb(s) was out. I pulled over a second time to check my blinkers, fearing I would cause an accident, and all my flashers, brake lights and blinkers were working fine. The warning lights on the console went on and off intermittently. …
Doors will not open because door locks will not unlock. Key fob button will not unlock any doors 90% of the time. Most of the time I can only get in car on drivers side with manual operation of driver's side door lock (sticking key in lock and turning). Once in car, 90% of time I still cannot unlock any other doors, even by pulling on door handle (which would ordinarily unlock the door). The interior button to unlock the doors will not work. On Friday, 12/9/11, I could not even get out of the driver's side door when I arrived at my destination. (car is set to automatically engage all locks once I start driving) I had to roll window down and reach out and unlock door with key. When my son and daughter drive with me, they have to get in and out of car either by crawling across driver's seat or go through a window opening. …
My vehicle has the same incident about a dozen of times in the last 4-5 years. The vehicle suddenly had check engine light, ABS light, traction control light, and brake light on, engineer started to knocking, speed forced down to less than 30 MPH within in seconds. It was quite scaring when the vehicle was on the highway with speed at ~50-70 mpg. My dealer has made several repairs, changing everything in this speed controlling system multiple times according to the book, including throttle body twice, electric harness three times, and control computer unit once, but the problem recurs. Occasionally, resetting the system and/or restarting the car, and sometimes reconnecting every parts of the system can avoid the problem for a while (from a days to 1-2 years). Although it is unpredictable in when, it would come back. The problem seems to come more often when the weather become more wet. …
I purchased a new 2003 BMW 325 in July, 2003 from performance BMW in chapel hill, nc. The ignition coil had to be replaced today on the #2 cylinder. The vehicle currently has 8,000 miles on it. I was told by mel, the service tech at performance BMW in chapel hill, nc, that BMW has had problems with the ignition coils on the 2003 and 2004 models and that because of these problems BMW has switched vendors for these ignition coils and no longer uses the vendor that supplied the parts for my car. Since there a 6 ignition coils in my car, that means that at any point in time any one of the other 5 ignition coils could fail and leave me stranded as happened today. I asked the dealer to replace all the igniton coils in my car that were supplied by this vendor seeing as I am a female who travels frequenctly for business through rural areas where it would be easy for me to be stranded. …
Four times since I buy a 2003 BMW 325i , I have to get the auto to guarantee service for replacement of the struct front bushing, now , after replace them at 32,000 miles about four month ago, my car at 37,000 miles request a new bushings. They said me that BMW was no longer replace them by guarantee because of the road conditions in puerto rico. When I buy the car I paid for a guarantee and I think that is impossible that a car like this , the ultimate drive machine require every four month to replace that parts. They should install a good reinforced genuine parts and not a remanufactured. I always try to avoid the holes, but I ask when it's raining it start a red light that indicated " please avoid this hole" . …
The warning light for my passenger side tail light has been going on and off for months as if there is a short in it. It stayed on permanently this month, showing a dimmer light than the working side tail light, so I had it checked when I had the oil changed at my BMW mechanic. He informed me there was a recall for tail light assemblies for my vehicle and told me to call the dealer to check the VIN number. I called the dealer last Friday, June 22, 2012 and was informed that my vehicle was part of the recall and that someone would call to make an appointment for the work. No one called, so I called again today and they said the VIN was not part of the open recall. The tail light is acting like the other tail lights that were recalled so I do not understand how it cannot be part of the recall.
Electrical complaints in other 325i years
Frequently asked questions
How common are electrical problems on the 2003 BMW 325i?
NHTSA has 43 complaints about the electrical system of the 2003 BMW 325i, 22% of the model year's 199 complaints. The component named most often is ignition (4 mentions).
Is there a recall for 2003 BMW 325i electrical problems?
No. NHTSA lists no electrical system recall for the 2003 BMW 325i, though it has 7 recalls for other components. 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 2003 BMW 325i electrical problems start?
Half of the complaints with a recorded mileage happened before about 61,000 miles, and 19% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 5 fires and 3 injuries to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
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.