The pics are what's left to a right rear strut assembly. It was on my 99 Legacy. Was curious if anyone else has had this problem. I've never seen this in my 20 years in the automotive industry.

Nope..........it looks like it needs replacing. LOL Me thinks it is OEM original, and spent its life in the rust belt. I have a 99, that I replaced the struts all around about 3 years ago, that were originals. What came off looked nothing as bad as yours.

It usually happens to the front struts on those cars. Subaru had a recall on them because the perches were rusting out and springs going into tires... I actually had it happen on my 96, it never had the recall done.

I ended up replacing both of the rears. Found some almost new ones on a donor car. Guy had them on the car long enough to do a 50 lap endro race. Wish he had rear disk brakes too.

 

I did a check online to see if my Ruby had any open recalls. But she came back clean. Maybe I should call the dealer to double-check. I like free warranty work. Lol.

I see lots of rusted out parts break. You think that's scary look up pics of the rear cross members rusting out on Subarus. Control arms rusting out on Kia's, toyotas, Chevys, Dodge.

Speaking of Toyotas, frame rust recall on the Tundra and Tacoma pickups in the mid 2000 range. Frames literally snapped in half from rust on some trucks that were not even ten years old at the time.

Oh you'd be way past the warranty on those anyway. 

And yea, I had a 2000 outback, this was the subframe

Oh you'd be way past the warranty on those anyway. 

And yea, I had a 2000 outback, this was the subframe

 

Mine isn't that rusted out yet. Lol. But it's very rusty. The underneath of her is almost rust free. Just everything bolted to her is rusted. Looks like everything is still stock. She only has 110,500ish miles. Not bad for a car that's 18 years old.

I have a rust Free Subaru rear sub frame in CO.  80919  It is going to the recycle yard if it's not picked up or shipped to someone.

 

Larry