Anyone with a GR (08+) STi replace their O-ring? Is it the same as previous years? My 2010 has been whining for a few weeks now, started getting louder during the colder months. Seems to quiet down a bit after the car's warmed up but it's still noticeable, especially at low speeds/standstill. No bubbles in the reservoir and steering feels fine, but that whine is irritating!
I've been to a few local shops and I haven't found an O-ring that matches the sizes posted on this and other threads yet.