00 00... Output shafts: checking gaiters for leaks
WARNING: This page is about a different car, the 2006 BMW X5, 2005 BMW X5, and 2004 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Turn rear right and left wheels by hand.
In so doing, inner and outer gaiters for damage such as holes, cracks or porosity.
Check gaiters for leaks (emerging grease).
Check that strap retainers are securely attached to gaiters and whether any straps are missing.