AAF uses the best race grease to pack these wheel bearings for the highest quality for your Spec E46. We use these bearings and recommend them for all Spec E46 cars.
The easiest way to verify if it’s your wheel bearings is to jack the rear of the car, put a hand on top and on the bottom of the wheel in question, and try to see if the wheel has any play. If it does, it’s best to change the wheel bearings before they become more than just an annoying sound and leave you stranded on the track. Don’t take the unnecessary pit, Be safe and get to the front!