hi there scout789. I looked into this and it looks like Yakima Racks line of trunk mount bike racks is not compatible with the 2007 Volvo s60. Fortunately Thule Racks does have trunk racks that work on your car. I'd definitely recommend going with the
Thule 962 Speedway bike rack. It will hold 3 bikes and it also has a 6 strap system, meaning it will hold the most securely and stably on the trunk of your Volvo s60. Also the Thule 962XT has the Thule T3 and 955 No-Sway cages included.This means the bikes won't ever swing around or knock into the back of your car either.