Go to https://parts.subaru.com/ and select the appropriate model/engine/transmission for your vehicle (or use the VIN lookup)
Click on the All Categories then Suspension and Brakes
Scroll down to Front Axle Housing and click that
That takes you to the above image
If you scroll down and click on the part number it brings up this page
https://parts.subaru.com/p/Subaru_2004_Impreza-Outback-Wagon-25L-AT-4WD/HOUSING-FRONT-AXLE-LEFT/49238038/28313AE030.html
If you click on the What This Fits then on the Show More down arrow it brings up the list of vehicles that this is installed on
Subaru Baja 2.5L AT PICK UP
2003, 2004, 2005
Subaru Baja 2.5L AT S PICK UP
2003, 2004, 2005, 2006
Subaru Baja 2.5L MANUAL PICK UP
2003, 2004, 2005
Subaru Baja 2.5L MANUAL S PICK UP
2003, 2004, 2005, 2006
Subaru Baja 2.5L TURBO MT B PICK UP
2003, 2004, 2005, 2006
Subaru Baja 2.5L TURBO S/S B PICK UP
2003, 2004, 2005, 2006
Subaru Forester (251) AT X
2003, 2004
Subaru Forester (251) AT XS
2003, 2004
Subaru Forester (251) MT X
2003, 2004
Subaru Forester (251) MT XS
2003, 2004
Subaru Forester 2.5L AT L
2000, 2001, 2002
Subaru Forester 2.5L AT S
2000, 2001, 2002
Subaru Forester 2.5L AT X
2004, 2005, 2006, 2007, 2008
Subaru Forester 2.5L AT XS
2004, 2005, 2006, 2007, 2008
Subaru Forester 2.5L AT XT Sports
2007, 2008
Subaru Forester 2.5L MANUAL L
2000, 2001, 2002
Subaru Forester 2.5L MANUAL Premium
2000, 2001
Subaru Forester 2.5L MANUAL S
2000, 2001, 2002
Subaru Forester 2.5L MANUAL X
2004, 2005, 2006, 2007, 2008
Subaru Forester 2.5L MANUAL XS
2004, 2005, 2006, 2007, 2008
Subaru Forester 2.5L MANUAL XT Sports
2007, 2008
Subaru Forester 2.5L TURBO AT XT Sports
2003, 2004, 2005, 2006, 2007, 2008
Subaru Forester 2.5L TURBO MT XT Sports
2003, 2004, 2005, 2006, 2007, 2008
Subaru Impreza (205) 5MT 4WD WRX Sedan
2002, 2003, 2004, 2005
Subaru Impreza (205) 5MT 4WD WRX Wagon
2002, 2003, 2004, 2005
Subaru Impreza (205) AT 4WD WRX Sedan
2002, 2003, 2004, 2005
Subaru Impreza (205) AT 4WD WRX Wagon
2002, 2003, 2004, 2005
Subaru Impreza (251) 5MT 4WD Outback Wagon
2002, 2003, 2004
Subaru Impreza (251) 5MT 4WD RS Sedan
2002, 2003, 2004
Subaru Impreza (251) 5MT 4WD TS Wagon
2002, 2003, 2004
Subaru Impreza (251) AT 4WD Outback Wagon
2002, 2003, 2004
Subaru Impreza (251) AT 4WD RS Sedan
2002, 2003, 2004
Subaru Impreza (251) AT 4WD TS Wagon
2002, 2003, 2004
Subaru Impreza 2.2L AT 4WD Brighton Wagon
2000, 2001
Subaru Impreza 2.2L AT 4WD L Coupe
2000, 2001
Subaru Impreza 2.2L AT 4WD L Sedan
2000, 2001
Subaru Impreza 2.2L AT 4WD L Wagon
2000, 2001
Subaru Impreza 2.2L AT 4WD Outback Wagon
2000, 2001
Subaru Impreza 2.2L AT 4WD TS Sedan
2000, 2001
Subaru Impreza 2.2L MT 4WD Brighton Wagon
2000, 2001
Subaru Impreza 2.2L MT 4WD L Coupe
2000, 2001
Subaru Impreza 2.2L MT 4WD L Sedan
2000, 2001
Subaru Impreza 2.2L MT 4WD L Wagon
2000, 2001
Subaru Impreza 2.2L MT 4WD Outback Wagon
2000, 2001
Subaru Impreza 2.2L MT 4WD TS Sedan
2000, 2001
Subaru Impreza 2.5L 5MT 4WD Outback Wagon
2004, 2005, 2006, 2007
Subaru Impreza 2.5L 5MT 4WD RS Sedan
2004, 2005
Subaru Impreza 2.5L 5MT 4WD RS Wagon
2004, 2005
Subaru Impreza 2.5L 5MT 4WD RSPRO Sedan
2004, 2005
Subaru Impreza 2.5L 5MT 4WD Sedan
2006, 2007
Subaru Impreza 2.5L 5MT 4WD Wagon
2005, 2006, 2007
Subaru Impreza 2.5L AT 4WD Outback Wagon
2004, 2005, 2006, 2007
Subaru Impreza 2.5L AT 4WD RS Coupe
2000, 2001
Subaru Impreza 2.5L AT 4WD RS Sedan
2000, 2001, 2004, 2005
Subaru Impreza 2.5L AT 4WD RS Wagon
2004, 2005
Subaru Impreza 2.5L AT 4WD RSPRO Sedan
2004, 2005
Subaru Impreza 2.5L AT 4WD Sedan
2006, 2007
Subaru Impreza 2.5L AT 4WD Wagon
2005, 2006, 2007
Subaru Impreza 2.5L MT 4WD RS Coupe
2000, 2001
Subaru Impreza 2.5L MT 4WD RS Sedan
2000, 2001
Subaru Impreza 2.5L TURBO 5MT 4WD WRX Sedan
2005, 2006
Subaru Impreza 2.5L TURBO 5MT 4WD WRX Wagon
2005, 2006
Subaru Impreza 2.5L TURBO 6MT 4WD STI Sedan
2004
Subaru Impreza 2.5L TURBO AT 4WD WRX Sedan
2005, 2006
Subaru Impreza 2.5L TURBO AT 4WD WRX Wagon
2005, 2006
Subaru Legacy 2.5L AT 4WD Brighton Wagon
2000, 2001, 2002, 2003
Subaru Legacy 2.5L AT 4WD GT Limited Sedan
2000, 2001, 2002
Subaru Legacy 2.5L AT 4WD GT Sedan
2000, 2001, 2002
Subaru Legacy 2.5L AT 4WD GT Wagon
2000, 2001, 2002
Subaru Legacy 2.5L AT 4WD L Sedan
2000, 2001, 2002, 2003, 2004
Subaru Legacy 2.5L AT 4WD L Wagon
2000, 2001, 2002, 2003, 2004
Subaru Legacy 2.5L AT 4WD Outback Wagon
2000, 2001, 2002, 2003, 2004
Subaru Legacy 2.5L MT 4WD Brighton Wagon
2000, 2001, 2002, 2003
Subaru Legacy 2.5L MT 4WD GT Limited Sedan
2000, 2001, 2002, 2003, 2004
Subaru Legacy 2.5L MT 4WD GT Sedan
2000, 2001, 2002, 2003, 2004
Subaru Legacy 2.5L MT 4WD GT Wagon
2000, 2001, 2002, 2003, 2004
Subaru Legacy 2.5L MT 4WD L Sedan
2000, 2001, 2002, 2003, 2004
Subaru Legacy 2.5L MT 4WD L Wagon
2000, 2001, 2002, 2003, 2004
Subaru Legacy 2.5L MT 4WD Outback Wagon
2000, 2001, 2002, 2003, 2004
Subaru Legacy 2.5L S/S 4WD GT Limited Sedan
2002, 2003, 2004
Subaru Legacy 2.5L S/S 4WD GT Sedan
2002, 2003, 2004
Subaru Legacy 2.5L S/S 4WD GT Wagon
2002, 2003, 2004
Subaru Legacy 3.0L AT 4WD L Sedan
2001, 2002, 2003, 2004
Subaru Legacy 3.0L AT 4WD Outback Wagon
2000, 2001, 2002, 2003, 2004
Subaru STI 2.5L TURBO 6MT 4WD Limited Sedan
2007
Subaru STI 2.5L TURBO 6MT 4WD SEDAN
2003, 2004, 2007
Subaru WRX (205) 5MT 4WD SEDAN
2002, 2003, 2004, 2005
Subaru WRX (205) 5MT 4WD WAGON
2002, 2003, 2004, 2005
Subaru WRX (205) AT 4WD SEDAN
2002, 2003, 2004, 2005
Subaru WRX (205) AT 4WD WAGON
2002, 2003, 2004, 2005
Subaru WRX 2.5L TURBO 5MT 4WD SEDAN
2005, 2006, 2007
Subaru WRX 2.5L TURBO 5MT 4WD TR SEDAN
2007
Subaru WRX 2.5L TURBO 5MT 4WD WAGON
2005, 2006, 2007
Subaru WRX 2.5L TURBO AT 4WD SEDAN
2005, 2006, 2007
Subaru WRX 2.5L TURBO AT 4WD WAGON
2005, 2006, 2007