Fixed Rear Door Quarterlights on the S-Type
Unlike many modern sedans that run a single pane of drop glass in the rear doors, this car isolates the rear corner with a stationary quarter window seated inside the door frame. Often listed as rear vent glass, these units never open or tilt. Jaguar built the glass as solid tempered safety glass with a light green solar tint across all production years, entirely free of heating elements, embedded radio antennas, or acoustic interlayers.
The glass pane rests inside a dedicated rubber perimeter run-channel, bound along its leading edge by a painted metal vertical division bar. This vertical post performs double duty: it locks the stationary quarterlight into position while serving as the rear guide channel for the primary sliding window glass. Because this glass is mechanical and non-structural, I install aftermarket replacements from proven manufacturers like Pilkington, PGW, FYG, and XYG that match the factory green tint and edge curvature seamlessly.
Trim Variations: S-Type R, Sport, and Luxury Packages
While the glass pane itself maintained consistent dimensions across the entire 2000 through 2008 run, the surrounding exterior architecture depended strictly on how the car was ordered. The perimeter finishers around the window opening came in distinct finishes that dictate how the door is trimmed out:
- Bright Chrome Finishers: Equipped on base, 3.0 V6, and 4.2 V8 Luxury or Sovereign editions, wrapping the upper door frame and tapering into the quarter window base.
- Black Window Surrounds: Finished in satin or gloss black on the supercharged S-Type R and select Sport models, matching the monochromatic trim package.
The table below breaks down the factory quarter glass details and structural hardware across the door frame.
| Component | Specification | Function / Hardware Details |
|---|---|---|
| Glass Construction | Tempered Green Solar | Fixed station glass; non-opening quarterlight |
| Vertical Division Post | Rigid painted guide track | Separates vent glass from movable drop window |
| Lower Trim Fastener | 9mm hex-head retaining bolt | Locks rear corner of the exterior finisher strip |
| Upper Frame Retainers | Clip part XR826786020 | Nylon push-in clips securing exterior moulding |
Hardware Weaknesses and Door Disassembly Points
Servicing the fixed quarter glass involves accessing the inner door structure. The interior door casing and vapor barrier must come off to access the fasteners securing the vertical division bar inside the door shell. Once that division channel is unbolted and shifted, the glass can slide clear of its rubber weatherstrip channel.
Age takes a toll on the hardware surrounding this glass. The exterior upper door finisher is anchored at the lower rear corner by a small fastener requiring a 9mm socket, but the rest of the strip relies on plastic retainer clips (part XR826786020). These nylon clips bake in the sun, become brittle, and snap, causing the exterior moulding around the quarterlight to bow outward or rattle loose at highway speeds.
Similarly, the horizontal waist seal at the base of the glass hardens over time, shrinking away from the division post and allowing rainwater into the door cavity. A failing regulator clip on the factory Brose drop-window mechanism can also cause the adjacent sliding glass to drop into the door suddenly; while often mistaken for a structural failure involving the fixed quarter frame, the stationary glass and division post typically remain undamaged throughout that mechanical failure.
