XC90 FWD L6-3.2L VIN 98 B6324S (2007)
Key in the off position
Disconnect the negative battery lead.
DO NOT remove the SRS connector for this procedure.
Remove the B-pillar panel, according to VIDA:
Removal, replacement, and installation
8 Body and interior
Upholstery for wall/door, side, rear shelf, luggage rack
B-pillar trim panel