Factory Glass Unity Across Every Trim Level
Subaru streamlined the rear glass on this production run so that a Base WRX, an STI Limited, and even hand-finished variants like the Type RA and S209 all share the exact same rear window footprint. The original assembly line part 65109FJ000 was updated to dealer number 65109FJ001, matching the stationary curved safety glass profiled under NAGS number FB25523. The widebody styling of this era did not alter the glass frame itself; Subaru built this performance sedan using the identical greenhouse opening found on the GJ-series Impreza sedan, rather than carrying over the 5-door hatchback back glass seen in earlier lineups.
Every replacement panel incorporates a horizontal heating grid through the middle and lower fields to melt away ice, alongside a dedicated upper element designed for the radio. The glass features a solar-control green tint and a dark perimeter ceramic frit band that conceals the direct-glazed polyurethane bond against the steel pinch-weld.
| Component | OEM Reference | Function and Layout |
|---|---|---|
| Back Glass Assembly | 65109FJ001 | Green solar tint, grid lines, frit border |
| Reveal Moulding | 65158FJ000 | Outer perimeter gap closure |
| Alignment Locator (LH) | 65135FJ010 | Left-hand structural indexing pin |
| Alignment Locator (RH) | 65135FJ000 | Right-hand structural indexing pin |
| Upper / Lower Foam Dams | 65145FJ000 / 65145FJ020 | Polyurethane flow barrier strips |
Interior Clearances and Rattle Prevention
The lower edge of this window sits unusually tight to the interior rear parcel shelf and the inner C-pillar trim panels. Subaru mounted the Center High-Mount Stop Light directly on top of the rear deck inside the cabin, resting it flush against the bottom ceramic frit. If you drive an STI with the large factory rear wing, that tall spoiler sits in line with the third brake light beam, which is why preserving correct glass angle and vertical height with the dedicated locator pins is so critical.
These cars are notorious for interior parcel shelf buzzes, often provoked by firm factory suspension setups, cold weather, or aftermarket cat-back exhaust rumble. When a broken rear window leaves your car exposed to the elements, I can usually be at your location about an hour after you get in touch, bringing a replacement panel that matches original acoustic clearances so the rear shelf plastic does not tap against the glass edge.
Defroster Grid Vulnerability and Winged Trim Variations
The exposed defroster lines on the inner cabin surface require careful handling. Many owners accidentally sever these printed traces during window tint removal or aggressive interior glass scrubbing, leaving entire horizontal bands inoperative. Replacing the entire glass unit is the only lasting way to restore full winter visibility once those traces break across multiple sectors.
At the exterior roofline, the glass butts directly against the painted steel roof and sits right below the roof-mounted satellite antenna base. Many owners bolt or tape aftermarket vortex generators or rear window roof visors along this upper edge. The factory upper dam rubber and perimeter reveal moulding ensure that airflow driven off these roof accessories flows smoothly across the glass without catching the moulding lip or causing wind whistle at highway speeds.
