Six problems related to exterior lighting have been reported for the 2003 BMW 325. The most recently reported issues are listed below.
The xenon projector bowls in the headlight assembly on both sides of the vehicle have slowly been burning. The bowl is made of plastic and with the heat of the xenons burns the plastic creating not only a fire hazard but also greatly reduces the effectiveness of the headlight beam, rendering it almost useless. This is specific to the oem manufacture of the headlight assembly, zkw. This has also been well documented on various forums for these vehicles over the years.
My rear window and the rooftop dont work I can hear the motors but nothing happens a technician explain that the regulator and lines are broken its a common thing on my model he specified.
Right taillamp failure and left taillamp intermittent operation. Electrical system repair: right rear taillamp connector and bulb carrier corroded. Dealer replaced pigtail harness and bulb carrier with updated design: socket housing, terminal, contact, cable connector, hose, insulation housing, flat contact, cable socket and bulb socket.
Poor connection at rear lamp connector. BMW. Model e46. ( NHTSA item number - 10020856 ).
The tail-lights of my BMW 325i have periodically shorted out ever since I purchased the car. The warning light on the dashboard indicates that the light is not functioning correctly, and is not corrected by replacing the bulb. Before my warranty expired BMW replaced the rear tail lamp module which corrected the problem, but already the replacement module has shorted out again. Currently both tail-lights are shorting out.
Xenon lights went out shortly after the 50,000 mark. Shortly after car kept going into fail safe mode, kept getting low voltage readings on diagnostics. One BMW dealers kept telling me I needed to rebuild transmission. All they would do is plug the car into the computer and see the tranny reading on the scanner. The reason there was a tranny reading was because the car was in fail safe mode. I eventually had the tranny rebuilt and I still had the same issue. I would cycle the ignition and restart the car and car would drive fine. It keeps going into fail safe mode everytime I start the car. Its harder to get it out of fail safe mode in the winter with colder starts.