The subaru service manual that i found online states for this.
Wrx rack and pinion leak.
Learn the causes and symptoms of rack and pinion leaking so that you can spot the trouble right away and take necessary rack and pinion repair.
On narrow body 2008 2010 wrx models you will have to shorten the tie rod ends.
We take 5 8 off each inner and outer it.
The first and the obvious indication of rack and pinion leak is a burning oil smell and a red or pink puddle under the rear side of the engine.
A little troubleshooting and i discovered the source the leak is originating from the input shaft coming into the rack and pinion gearbox.
Depending on the size of the leak you may not necessarily have steering issues with a rack and pinion leak especially if it is a minor leak.
Repair options for a leaking rack and pinion system with power steering rack and pinion leaks are often expensive to fix as the seals are difficult to service even by a mechanic.
I drive a 2009 wrx no mods and noticed that i was leaking power steering fluid recently.
Most leaks are solved by replacing the entire rack and pinion system to ensure the system works correctly.
The 2015 sti has the quickest steering ratio of any subaru product to date it s 13 1 compared to 15 1 on older wrx and sti models.
An alternative is a power steering stop leak product.