Galant Rear Window Variants and Audio Grid Differences
Selecting the correct replacement rear window for this sedan comes down to checking whether your car has an embedded radio antenna printed onto the glass alongside the heating elements. Base trims rely solely on a standard electric defroster grid, cataloged under NAGS part number FB22010. If your car came equipped with the upgraded audio package, the window uses NAGS part number FB22011, which incorporates an integrated AM/FM diversity antenna across the upper section of the glass panel above the heating lines.
Mitsubishi revised the rear window assembly several times throughout the production run. Early builds from 2004 to 2006 originally shipped with dealer part MN181757, followed by mid-cycle part numbers 6131A010 and 6131A038. When the model underwent exterior styling updates for the 2008 to 2012 model years, the factory rear glass shifted to part number 6131A041. While dealer inventory has shifted over time, I supply high-grade aftermarket rear glass manufactured by recognized brands like FYG, XYG, Pilkington, and PGW to ensure exact defroster resistance and precise solar-green tint matching without dealer markups.
Perimeter Moldings and Structural Glass Hardware
The rear stationary glass on this car sits flush against the roofline and quarter panels, relying on specific hardware to stay aligned and sealed:
- Upper Reveal Molding: The top edge of the glass opening is sealed using an exterior reveal molding (Mitsubishi part MR598904), which prevents debris accumulation along the roof seam.
- Lower Support Spacers: Setting the back glass requires factory-style bottom stoppers (part numbers MN169755 and 6131A047). These lower blocks support the weight of the tempered pane so it does not slide downward before the high-modulus polyurethane adhesive fully sets.
- Defroster Grid Construction: Unlike front windshields, the back window is solid tempered safety glass without internal acoustic interlayers, rain sensors, or wiper hardware. Both FB22010 and FB22011 feature horizontal conductive traces backed by low-profile electrical spade terminals on the inner glass border.
Can damaged defroster lines be repaired without replacing the glass?
Minor breaks in a single conductive trace can sometimes be bridged using silver conductive paint, but if multiple lines are sliced—frequently caused by razor blades during old window tint removal—or if the electrical connection tab snaps off the glass edge, replacing the entire tempered rear window is the only reliable fix to restore winter defrosting.
How do I know if my rear glass has the built-in diversity antenna?
Look closely at the upper third of the rear window from inside the car. If your defroster lines run continuously from top to bottom, it is the standard grid (FB22010). If the top few lines are electrically separated from the main heating pattern and run to their own secondary wiring harness at the pillar, your car has the antenna grid (FB22011) paired with the audio system.
Why does my third brake light area rattle after rear glass work?
The center high-mount stop lamp sits on the interior parcel shelf directly behind the bottom edge of the back glass. If the plastic retaining clips on the brake lamp housing or the rear deck trim were stressed or loosened during past interior work, the housing can vibrate against the lower glass surface over rough roads.
