Motor is straight forward, if you know the transverse I4/I5/I6 cylinder then it's pretty easy to maintain with PCV service and oil trap and timing belt as the required maintenance items. Water pump and alternator here and there but my '05 ran great on the day I sold it in 2021 with 200+k miles. XC90...

Might be old PS fluid, might be a seeping water pump, might be from the oil cooler, there's really nothing other than that to leak. I see folks write about RMS issues but in my estimation those are rare and most are misdiagnosed PS pump leaks. Timing cover is seeping versus outright leaking, that's ...

PS pump seeps then leaks, runs down the front and back through the valley. Stuff is really thin, gets all over everything. I did see some posts about the top oil presure pipe o-ring leaking but that's usually been a new o-ring and it was maybe only one or two. Pump o-rings will leak, I replaced both...

Maybe need to adjust the sunroof. Here's a calibration post here- https://www.matthewsvolvosite.com/forums/viewtopic.php?t=44603 , I do this upon occasion. Adjustment itself is here: XC90 Sunroof Adjustment_1225.pdf ,you should calibrate after you're completed for a final visual check on the adjustm...