Twin turbo had to be replaced in February 2008. Not cheap. But ever since then, there has been a lack of power and very sluggish on take off and when trying to pass on the highway. Had the control valve replaced just recently, helped some, but still very sluggish. Think the Volvo dealer here have morons for service tech's.

- Redmond, OR, USA

For the past year my check engine and urgent light have been popping on. I have to go to my machanic (who is Volvo certified) to have them turn off. But the check engine light comes on more frequent now. For the past 6 months, when I start the car, it hesitates and runs rough, like it is going to stall. The first time this happened my machanic said it needed a tune up. Today 10/19/06 I brought it to my macanic again, and they told me it was the throttle module and the 1999 S80 's are having all the same problems, and that I need to take it to an authorized dealer, before it gets worse.

- Atlantic City, NJ, USA

: the contact stated the ABS, traction control, check engine, and total brake failure lights illuminate at different times. There is a noise that sounds as if the ABS is activating. The vehicle has not been seen by the dealership or an independent repair shop.

- Netcong, NJ, USA

On September 10, 2005 at approximately 2:30 pm, my engine abruptly stalled while traveling at highway speeds with cruise control engaged. I pulled the car off to the side of the road. It would not restart. Upon each attempt to restart, the engine would actually run roughly for 1-2 seconds and then stall. I had the car towed about 35 miles to my Volvo dealer. When it arrived, it started. This is the second time this has happened. The last time, the dealer found no problem. I am aware that Volvo suspects the throttle body in these matters. Mine has already been replaced!

- Weatogue, CT, USA

My 1999 Volvo S-80 T-6 suffers from a design flaw associated with the throttle body and engine warning light. The light is on all of the time. Servicing does not clear the light, so I have begun to simply ignore the light. The throttle body has a problem where the engine runs properly for 20,000 then begins to oscillate upand down by 200-300 rmps at idle. This seems minor, but it almost caused a major accident yesterday. When slowing to a stop at a major intersection, the engine slowed to idle and then sped up just as I was about to come to a stop. The higher RPM caused the car to move into the intersection. If another car had been approaching, it would have struck my car. I asked my wife (this is her primary car)if she had experienced the same problem and she said she had several times. I went on the web and found that many Volvo owners are experiencing the same RPM and engine light problems. I do not know if they have had the same near accident I did, but I must assume they have. Have you received other complaints about this problem and has Volvo been notified? I contacted Volvo and they denied any problem. The words on the internet tell me they are mistaken. Some one could get killed by this design flaw.

- Wetumpka, AL, USA

The vehicle experienced low oil pressure, the dealer replaced the O-ring from the oil pump and oil pan top. The motor mount failed. Nlm

- Cincinatti, OH, USA