You left out two key pieces of information. What year Outback and which wiper motor.
If you are planning on working on your car yourself you should get the service manual for the specific model and year. These are available on eBay for under $10 in Adobe Acrobat .pdf format. Well worth the investment.
How do I replace the rear wiper motor or just remove the rear panel on the back window to see if my rear wiper motor is unplugged on my 2007 Subaru Outback? Thanks!
removal of rear winshield wiper arm on 07 outback
Get the blade directly from a Subaru Dealer. The other brands do not fit . I've tried to adapt them, it will not work. Get the whole wiper blade arm and blade from Subaru only. Very expensive for a wiper blade around $18
The 2000 Subaru Outback has various wiper sizes based off of trim (sport is different than other trims). See sources and related links below for the wiper blade sizes by vehicle trim.
wal mart
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The 2007 Subaru Outback has the most common "hook-end" wiper arms on the front and the newer style "roc lock 3" rear wiper arm attachment. See sources and related links below for installation videos. Also, purchase the replacement blades first and there will be additional instructions/illustrations on the replacement packages. Locate and press the tab or button where the wiper blade is inserted into the hook of the wiper arm and pull wiper blade out of hook. You may have to rotate and flex the blade to make enough clearance for the hook to pass through.
Remove the wiring harness from the wiper motor. Remove the windshield wiper arm from the wiper motor. Remove the wiper motor retaining screws. Reverse the process to install the new wiper motor.
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Remove the wiper arm from the wiper motor. Remove the wiring harness. Remove the wiper motor retaining bolts. Reverse the process to install the new wiper motor.