Sedan and Wagon Quarter Glass Differences
Replacing the stationary rear quarter glass on this model depends entirely on whether you drive the four-door sedan or the five-door wagon. On the BL sedan, the quarter window is a compact triangular pane permanently bonded into the C-pillar right behind the rear door opening. On the BP wagon—which Subaru discontinued for North America after the 2007 model year—the quarter glass stretches much farther back, bridging the structural space between the C-pillar and the D-pillar to form the cargo area side window.
The parts do not interchange between the two profiles. The sedan requires NAGS catalog part numbers FQ22362 (or FQ22362GTN) for the left side and FQ22361 (FQ22361GTN) for the right, matching factory part numbers 65222AG05B and 65222AG04B. When supplying glass for either profile, I source exclusively aftermarket units from proven manufacturers like Pilkington, PGW, FYG, and XYG to ensure the green solar tint and curved perimeter encapsulation accurately match your remaining original glass. Because these fourth-generation cars feature frameless side doors, the quarter glass sits stationary in the rear fender sheet metal rather than behind an in-door divider bar, making glass depth critical to how clean the transition looks from the door glass to the body.
Upper Roof Moulding Fragility and Fastener Clips
The fixed quarter glass relies on factory locator pins (Subaru part 65254AE00A) to sit at the exact factory depth within the pinch weld. If the glass sits even two millimeters too deep or too proud, the air rushing past the frameless rear door window will catch the edge and whistle at highway speeds.
The primary complication on these cars is the exterior roof side finish moulding running along the upper drip rail directly over the quarter glass. With age and sun exposure, this factory trim piece and its retention clips turn extremely brittle. Because replacements from Subaru are increasingly hard to track down, that moulding has to be detached with extreme care from inside the wheel arch and C-pillar trim cavities to avoid snapping the tabs. Preserving that drip rail ensures the perimeter channel stays sealed against water runoff pooling along the bonded urethane edge.
Post-Replacement Inspection Checklist
After your new quarter glass is fitted, examine the exterior seam and surrounding body trim to ensure a quiet, leak-free cabin:
- Inspect the exterior gap between the front edge of the quarter glass encapsulation and the trailing edge of the rear door window to confirm consistent vertical clearance.
- Check the roof side finish moulding running directly above the glass to make sure it sits flush against the roofline without lifted ends or cracked clips.
- Verify that the interior C-pillar trim panel (and D-pillar trim on wagons) has been fully reseated into its body retainers without gaps around the glass perimeter.
- Take the car to highway speeds and listen closely at the C-pillar for high-pitched whistling or buffeting, which indicates wind catching an uneven outer moulding.
- Check the glass during a wash to confirm that water runs cleanly down the factory drip channel without catching behind the perimeter rubber seal.
