Checking And Cleaning

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Cleaning Drive Shaft End

Courtesy of VOLVO CARS OF NORTH AMERICA.

Clean:

the drive shaft end, especially if there is rust on the edge.
(The outer seal ring of the wheel hug will lie against this surface).
the mating faces of the wheel hub in the wheel spindle
the wheel sensor
the sensor seat in the wheel spindle so it is absolutely clean
the wheel sensor. Use a soft brush.