Identifying Vent and Quarter Glass on Sebring Body Styles

When drivers contact me about replacing broken vent glass on this car, the first detail I clarify is the body style, because this car does not have a traditional stationary triangular door vent. If you drive the sedan, the rear doors use a single piece of roll-down glass with no division bar or separate quarter pane. If you drive the convertible, what most people refer to as the vent glass is the small, frameless rear quarter window that retracts down into the body panel behind the front door.

The distinction matters because the glass panels and the hardware operating them are completely different across the lineup:

Convertible (JR body): Features retractable, frameless tempered safety glass operated by an internal motor and cable regulator. Original Mopar references correspond to part numbers 4880139AB for the left driver side and 4880138AB for the right passenger side.
Coupe (ST-22 platform): Built on a different structural layout shared with Mitsubishi, utilizing stationary rear quarter glass panels bonded directly to the quarter pillar.
Sedan: Does not use a separate rear vent or stationary quarter pane in the door structure.

Why Convertible Rear Quarter Glass Breaks or Jams

The frameless drop glass on the convertible takes considerable physical strain because it lacks an upper sash or metal guide channel. Every time the door closes or the soft top latches down, the edge of this tempered panel presses tight against the vertical weatherstripping (Mopar 4724403AF on the left side, 4724402AF on the right side). When the internal plastic pulleys crack or the regulator cables fray, the panel tilts diagonally inside the quarter pocket. Operating the switch while the pane is cocked sideways binds the tempered glass against the steel inner structure, which can cause the entire pane to shatter instantly into small safety pebbles.

Impact damage from break-ins is also common because thieves target this smaller rear drop glass to reach the interior lock switches. When sourcing replacements for broken units, I supply aftermarket glass from established manufacturers like Pilkington, PGW, FYG, and XYG, which delivers the exact factory green solar-control tint needed to match your front door window and cut down cabin heat.

Sealing and Alignment at the Soft Top Junction

Unlike bonded glass that simply sits in a fixed bed of adhesive, the convertible rear quarter glass depends entirely on precise mechanical alignment. The glass bracket incorporates three slotted mounting bolts inside the rear quarter cavity that govern height, pitch, and inward tilt.

If these three adjustment bolts are not dialed in perfectly relative to the soft top rail and the front door drop glass, several issues immediately develop:

Severe wind buffeting: High-speed air forces its way through the B-pillar vertical weatherstrip joint where the leading edge of the quarter pane meets the front glass.
Water runoff intrusion: Rain cascading down the convertible roof C-pillar bypasses the top seal and drains straight behind the interior trim panels.
Panel bind during cycling: Incorrect tilt angles cause the top corner of the pane to collide with the roof frame guide when the electric regulator raises the window.

To reach these adjustment points and the regulator mounting bolts, accessing the assembly requires stripping out the rear seat lower cushion, the backrest, the speaker grilles, and the large molded side trim panel.

Can I swap a rear quarter window from a coupe onto my convertible?

No. The coupe uses fixed, stationary quarter glass that is bonded to the body pillars, while the convertible uses movable, frameless drop glass with mounting brackets attached to a motorized regulator track. The shapes, dimensions, and attachment methods are incompatible.

Does the rear quarter glass have built-in defroster lines or antennas?

No. The side quarter glass on this model is plain tempered solar-control glass. It does not contain electric defroster grids, embedded radio antennas, or electronic sensors. Rear window defrosting is confined solely to the heated glass pane in the folding convertible top or the coupe rear hatch.

Why won't my convertible quarter window roll up all the way?

If the motor runs but the glass stops an inch short of the convertible top weatherstrip, the internal regulator cable has likely slipped off its nylon track pulley, or the lower mounting bracket has shifted out of its slotted adjustment setting inside the quarter panel.