Is there really any mechanical difference in the cam drive systems in 45 states vs the 5 mentioned "progressive" states? Under PZEV, auto manufacturers are required to warrant the emissions systems up to 150,000 miles. I'm guessing the T-belts got included, somehow, in that requirement. If that's the case, my suspicion is that Volvo simply said, "OK, in these 5 states the first T-belt is under warranty to 150,000 miles", knowing good and well there is really no difference in sprockets, belt, tensioner, etc. Think about it - what are the odds Volvo will have to pay out on failed belts under 150,000. Many times a belt will last that long, "just because". Secondly, there is probably an "original purchaser" clause in the warranty, Thirdly, if a belt snaps at 13 years old / 130,000 miles, how many owners would even THINK that it was still under warranty.

Any time I bought a timing belt or tensioner, I was never asked what state the car was originally sold in. And I really doubt there is any difference in the sprockets or other timing components that would allow those engines' belts to last longer. If someone can show me any mechanical (or part number) difference in timing systems of the 5 state cars vs 45 state cars, I'll gladly have crow for dinner. Until then, it's going to be 105,000 miles for me.

Sorry if this should have gone under the Opinions forum, but I just think 150,000/15 years is flirting with danger.
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Current rides: 2005 Volvo S80 2.5T, 2003 Volvo V70 2.4NA, 1973 Volvo 1800ES (fixed the ignition - now back to the brakes again)