I will be doing an oil change and transmission/differential service this week.
Let me know what you think about these parts:
Rear diff bushing http://www.oembimmerparts.com/BMW_Di...6751808e46.htm
A/T service kit incl. filter http://www.ecstuning.com/BMW-E46-330...its/ES2523867/
Oil service kit incl. magnetic drain plug http://www.ecstuning.com/BMW-E46-330...vice/ES263047/
Differential flush kit http://www.ecstuning.com/BMW-E46-330...Kit/ES2588335/