Hello

My 99 S80 just reached the 150K mile mark. I would like to know is there a major service which I have to do at this mileage. Anything that needs to be replaced or checked. By the way the transmission was replaced at 117K miles with a brand new one so I think the transmission fluild should be fine. In the last 3K miles I also replaced the fuel filter, air filter and the front driver side balljoint. The trottle body was replaced at 80K miles 3 years ago. I heard that you need to clean the trottle body sometime so is that time to get it cleaned.

 

I was surprised that the Haynes book actually recommended changing the timing belt, tensioner and idler pulley every 40K miles. I quote from 1B-3, the 80K maintenance schedule:

So that would seem to be the Achilles heal of the S80, IMVHO.

EDIT: And in this case it's probably worth having the dealer do it, so if they botch the job it doesn't cost you $3500 for a replacement motor. Think of the extra money as insurance.

 

The 150K mark is the major tune up. Which it looks like you have done some already.
When was the last timing belt change?

 

The timeing belt was replaced at 114k back in 07 along with the tensionors and Idler pully. What about cleaning the trotttle body, is there a millege intervel that should be clean. Also what about the PCV service.

 

I would clean the throttle body and PCV with the service.