Move the seat all the way forward. Remove both rear seat rail plastic cover and remove both rear seat rail bolts. Move seat all the way back. Remove both front plastic rail covers and bolts. Tilt the seat back forward, this will help in the next step. Lift up and tilt the seat towards the back to access the buckle mounting bolt and connector. Turn off/remove the ignition key before removing the buckle connector or you will set an SRS code. Should not have to remove the seat from the car. You may have to disconnect the seat harness/connector to tilt the seat back.

 

Thank you! I could not move the seat in the junked car so it was pretty tight! I will be sure to move seat and disconnect battery too. Finding the right wire connection under the seat could be hard too.

 

The seatbelt itself...I have not done it yet.
I wrote the trick for the "Buckle" part for my 2005 XC90 below.

https://www.matthewsvolvosite.com/forums/viewtopic.php?t=68396

 

THANK YOU!

Follow up question...the main install looks pretty straight forward, although tight access for sure. Before I started to remove all the trim pieces, I was checking out the seatbelt I removed from the junked car, and it wont budge (wont roll out), as if it is locked in tight. Does that mean it is simply not working? The car I pulled it from had blown engine, so there was almost no impact, and airbags were still intact, so that's why I felt these belts would be safe to use, but I cant understand why I cant unroll the belt, and I don't want to get too far into it only to find it doesn't work.

The two wires from the main end feed some sort of silver metal cylinder that I assume controls the locking mechanism, but I do not know how it works.

DO you have any suggestions?

 

I was checking out the seatbelt I removed from the junked car, and it wont budge (wont roll out), as if it is locked in tight.

You have to hold it in the correct orientation otherwise it thinks the car is not upright. Hopefully, that's the only issue.

 

Think the two wires are for the seatbelt pretensioner. They're a pyrotechnic device (silver cylinder that forces the pre-tightening by firing a pin down on the belt cogs. May not be related to your not getting the belt to unroll but if they fired, I'm sure the belt will have irrevocably locked and will be useless.

Key is your statement about "almost no impact" above. If you can clarify, it'll help to omit them as a possible. Impact or no impact or something in between?