Two problems related to structure have been reported for the 2000 BMW 3 Series. The most recently reported issues are listed below.
The rear differential is completely torn away from the sub-frame caused either by weak sheet metal used or poor design. As a result countless other BMW e46 owners have experienced the same. Should this actually tear completely off the vehicle, it has the potential to cause a major accident and a possible fatality. . Read more...
Vehicle started making strange noises from the rear suspension while driving. Took it to a mechanic who confirmed this was the subframe of the car tearing away from the unibody. He also stated that this is a frequent occurrence in the e46 and e36 BMW model vehicles and has seen it before. Went online to several resources and confirmed there are many owners who experienced the same problem with their subframe tearing, cracking, or complete torn away.