I can tell you that the information that given to you is totally bogus.
The car comes with the following warranties:
[b]>3 yr/36k mile Bumper-to-Bumper Warranty that is actually more complete than most other manufacturers, as it covers "wear items" such as brake pads, hoses, and wiper blades as well as everything else in the car for that time span.
A 5 yr/60k mile Powertrain Warranty that covers the engine, transmission, and AWD system.
A 5 yr/Unlimited mileage Rust Perforation Warranty
An 8 yr/80k mile Federal Emissions Warranty
A lifetime seat belt warranty[/b]
Did your car NOT come with an Owner's Manual, Maintenance Schedule, and Warranty Booklet?
If not, I suggest that you contact Subaru at the corporate level, in order to obtain these booklets.
If you do have these booklets you should be aware that your current question--as well as most other things that you will ever need to know about the car--is covered by those little books.
All of that being said, I would be concerned about a 2011 car that was for sale after logging just 3,900 miles.
If this was a "demo" car, then my concern would be far less than if this car was a Lemon Buy-back" car.
Do you know the car's background, prior to your purchase of it?
For your sake, I really hope that it was a demo, rather than a Lemon Buy-back car.