If the tires are worn unevenly, if the vehicle is not stable on the highway or if the handling seems uneven in spirited driving, the wheel alignment should be checked. If an alignment problem is suspected, first check for improper tire inflation and other possible causes. These can be worn suspension or steering components, accident damage or even mismatched tires. If any worn or damaged components are found, they must be replaced before the wheels can be properly aligned. Wheel alignment requires very expensive equipment and involves minute adjustments which must be accurate; and should only be performed by a trained technician. Take your vehicle to a properly equipped shop.
Following is a description of the alignment angles which are adjustable on most vehicles and how they affect vehicle handling. Although these angles can apply to both the front and rear wheels, as delivered from the factory, On E30 models only the front toe is easily adjustable, the rear toe requires the installation and placement of eccentric trailing arm bushings. On E36 models, in addition to front and rear toe, the rear camber is also adjustable using common hand tools.