Hi fellow Legacy owner.
I'm in the midst of replacing that antenna. Found lots of replacement ones for sale on eBay. I probably only need the mast as my motor still works, but I've not yet found mast only for sale (found your query instead).
yikes, what a lot of stuff I've had to take apart to get to the old motor. I could almost access it from the car jack panel, but the foolish retaining screws are behind the trim panel, and taking that out means taking lots of parts out of the back area. (popping those cheesy retaining screws. Anyway, I got the old one out, and hope I can reassemble.
Not much of an answer, I know. Just fair warning, it's a nuisance.
best
http://www.antennamastsrus.com/Instructions%20Mast.htm
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There is no Power Steering Filter on a 2002 Subaru Legacy/Outback.
There is no dedicated fuse for the power seats.
The 2008 Subaru Legacy is 5 ft. 8.1 in. (68.1 in.)1 one-touch power windows wide.
The 2014 Subaru Legacy is 5 ft. 11.7 in. (71.7 in.)1 one-touch power windows wide.
The 2001 Subaru Legacy is 5 ft. 8.7 in. (68.7 in.)1 one-touch power windows wide.
The 2009 Subaru Legacy is 5 ft. 8.1 in. (68.1 in.)1 one-touch power windows wide.
The 2010 Subaru Legacy is 5 ft. 11.7 in. (71.7 in.)1 one-touch power windows wide.
The 2005 Subaru Legacy is 5 ft. 8.1 in. (68.1 in.)1 one-touch power windows wide.
The 2006 Subaru Legacy is 5 ft. 8.1 in. (68.1 in.)1 one-touch power windows wide.