I haven't seen a video/pictures on youtube or the forums, on the issues with the Volvo 3.2 alternator charging issues from the bolt that comes loose on the engine side. When this is happening to you- you might hear a howling noise because of the gear spinning free on the tapered shaft coming out of the engine (bolt comes loose on its own). You can also look through the right side intake tubes, down to the alternator and see the small rubber belt not spinning; i could read the belt's yellow font that read FoMoCo (Ford Motor Company) since it was stationary. I forgot to mention in the video the obvious things. You have to take the 2, 8mm bolts out that attach the ram-air intake to the top of the radiator support and remove it from the air box completely. You have to loosen the hose clamp holding on the triangle shaped air charge chamber, attached to the black plastic vacuum pipe going from the top of the air-box to the throttle body (bottom of the intake is the throttle body)- then remove that entire big pipe BUT the triangle air charge chamber has to come out separate- there isn't enough clearance for both; 7mm hose clamps). There are 7, 10mm bolts that hold the top of the intake plenum on- those plenum gaskets are worth 20/each- be careful so you can reuse them. There is a small coolant hose with quick connect that needs to be disconnected in the middle, top of the intake that comes from the expansion tank. My video has the rest. Turns out there is no updated bolt/parts, i checked with a friend at Volvo that confirmed this.

WARNING: If it is not the bolt like in my case, do not use a rebuilt or reman alternator on these vehicles. Volvo has seen blown ECM's in the xc90's from the inferior voltage regulators used from china that are installed on the aftermarket units. The factory oem unit is Bosch- stay safe, the ECM is worth several thousand. Also, the new alternators do not come with the gear drive pulley, volvo has a special tool for removal and install onto a new unit. I hope this helps some people. Let me know in the comments if you have more questions or need pictures.