Had an 01 S for 4 years. No rear main seal problems, but dealership replaced the MAF with the wrong one after I complained it took too long to crank after first year of ownership. With wrong MAF it kept backfiring on deceleration and blowing holes in the cats. The dealership blamed it on carbon deposits and did a valve cleaning with that pressurized solvent system and didn't change the oil after. 2 weeks later it spun a bearing. Porsche put a new motor in. Later a factory tech remembered there were two different MAFs for the 01 S and the put the correct one on and no more problems.
Also the clear coat started flaking off the red brake calipers, common on the 01 S. They tried to blame it on me autocrossing. I ask if it was from the calipers getting too hot from racing, wouldn't the fronts be the ones flaking. All four were and they replaced all four under warranty, $7000.
Had the top adjusted any time it hesitated or even sounded a little different going up or down and never had any issues. There is stuff called Plexus that does great at clearing the rear plastic window.
Really enjoyed driving my Boxster S. Kept the top down most all the time, and even kept an extra baseball cap behind the passenger seat for passengers that complained about the top being down.
