Problems for specific Volvo S80 years:
Problem Reports
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2005 Volvo S80 Problems
Front Upper Strut Mounts May Fail and Cause Noise Over Bumps
Front upper strut mounts may wear prematurely, resulting in loud noise from the front of the vehicle when going over bumps.
Transmission Will Not Shift Properly
Many complaints have been reported regarding Volvo S80 transmission shifting issues. Long shift times between gear shifts, hard shifting, hard downshifting and a loss of transmission operation all together to name a few.
If the issue is minor, a transmission software update may address this issue so if available, the software should be updated before any repairs are made. After a software update or repair, the shift adaptation needs to be reset. A good quality Volvo repair shop will know how to perform this task.
There are several technical service bulletins (TSB's) available from Volvo that address these shifting issues and they should be consulted by the repair shop during the automatic transmission diagnostic process.
Regular servicing of the transmission fluid can help with preventing transmission failure, but not in all cases. Follow the suggested fluid replacement interval recommended by Volvo. You will find this in your owners manual, or find it here: http://bit.ly/Volvo_Owners_Manuals
Abnormal Noise From Front Suspension Due to Worn Control Arm Bushings
The front control arm bushings wear out, resulting in alignment issues and squeaking and/or knocking noises from the front end. Worn bushings will require replacement.
Check Engine Light Due to Failed Mass Air Flow Sensor
It has been reported the mass air flow sensor may fail, resulting in illumination of the Check Engine Light.
Oil Leaks From PCV Housing and Turbo Return Line Seals
Engine oil leaks from the PCV housing and turbocharger oil return line seals have been reported.