(Originally released May 22, 2022, unedited ever since. This is the official post, if you find this anywhere else, it is not authentic and I cannot guarantee that your computer is safe when downloading reposts)

This mod isn’t the best, but I tried. It also isn’t as good as other XC90 mods like FastLane's, but this is free, and this is good enough. You can download this mod if you'd like, it has a detailed body mesh and underbody and may be a better choice for lower end PC's or people who just want a car for the exterior.

The mod doesn’t really have anything special in terms of features, however it is as realistic as I could make it. This includes somewhat accurate engine performance, accurate weight to real life, all XC90 trims to IRL (as of 2020), etc. The mod is based off of the Vivace with a heavily edited JBEAM, however you may still be able to tell the resemblance in handling.

This mod is a V2 of my old XC90, so here are all the change logs in V2 if you are interested:

• edited rear signals to the correct texture
• edited standard configuration
• edited engine power and noise values
• edited reverse light
• edited thumbnails
• edited configurations
• edited suspension names
• added meshs for chassis stiffening
• added interior trim options
• added interior leather type slot
• added black leather interior selection
• added anti chrome roof rails
• added door trim body slot
• added anti chrome door trim
• added eu taillights (non-drl taillights)
• added headlight retroreflectors
• added new configurations
• added r-design mirrors
• added inscription and momentum trim front bumpers
• added non-phev left fender
• added signal stalk
• added rear bumper underbody meshs
• added fender underbody meshs
• fixed wheels' rescaling
• fixed exhaust tips
• fixed hole in body mesh
• fixed left exhaust cutout normals
• fixed front headlight and bumper flares
• fixed soft rear suspension
• fixed underbody rear wheel arch gaps
• fixed wheel arch trim grouping
• revamped all jbeams
• edited r-design tailgate emblem to be separated
• edited weight to its real weight (roughly)
• edited materials

Credits:

• Mod Access (specifically, @Quickrobobro, @Lordlichi2006, @joseluisrc_19, @MANtarayman24, @_chemia,  @azureskies) - being the real ones
• Other than those people above, no one. I made it myself from scratch (except for the model, I forgot where that came from)

Bugs:

• Non-PHEV left fender has shading issues
• Makes a loud crash sound upon spawning due to colliding JBEAM’s
• No functioning gauge cluster

Model Source:
https://www.gtainside.com/en/sanandreas/cars/116304-volvo-xc90/
https://www.gtainside.com/en/sanandreas/cars/140129-volvo-xc90-t8/ 
https://www.gta5-mods.com/vehicles/2017-volvo-xc90-r-design-replace-els

I will not fix any of the bugs. Do not repost please.