Trim Finish Dictates the Fourth-Gen MDX Rear Quarter Glass Assembly
Ordering the correct replacement quarter window for this vehicle depends almost entirely on the exterior package. Acura engineered the stationary glass between the C-pillar and D-pillar with an outer perimeter molding that comes permanently bonded to the tempered unit straight out of the crate. Because that encapsulated trim cannot be cleanly transferred or peeled off an old unit, matching the factory exterior accents means selecting the right glass assembly code for your specific package.
Base, Technology, and Advance packages carry a bright chrome surround that aligns directly with the rear door beltline brightwork. In contrast, the performance-oriented A-Spec and Type S packages use a gloss black trim surround to match their factory dark accent themes. While North American buyers saw Acura skip the 2021 model year entirely to launch this redesign for 2022, all production years through 2027 share these two distinct molding options.
| MDX Trim Package | Surround Molding Finish | Driver Side (LH) Assembly | Passenger Side (RH) Assembly |
|---|---|---|---|
| Base / Technology / Advance | Bright Chrome | 73550-TYA-A01 | 73500-TYA-A01 |
| A-Spec / Type S | Gloss Black | 73550-TYA-A21 | 73500-TYA-A21 |
Factory Solar Tint and Integrated Reveal Components
Every quarter window on this vehicle comes equipped from the factory with dark solar privacy glass. If your glass is smashed, I can usually be at your driveway roughly an hour after you schedule the service so the exposed interior of your MDX is not left open to the weather. Because these aftermarket replacement units include the factory-depth solar tint built directly into the tempered structure, you do not have to worry about mismatched window darkness between the rear door drop glass and the new quarter panel.
The unit sits directly adjacent to several tight exterior tolerances, including the rear door frame seal, the roof rails running along the top edge, and the rear liftgate aperture flange. Built onto the backside of the glass carrier are molded alignment clips that dictate the outer reveal height against the metal quarter panel. If a replacement piece uses a generic or ill-fitting molding profile, the transition between the glass surround and the quarter bodywork will sit unevenly against the rear door window track, causing severe highway wind noise.
Interior Access Points and Antenna Wiring
Replacing the stationary glass requires navigating the interior cabin panels rather than simply working from the vehicle exterior. Inside the cargo area, the C-pillar and D-pillar interior quarter trim panels must be carefully unclipped and set aside. Behind these molded interior panels sit the integrated diversity radio antenna connections, which plug directly into terminals printed along the edge of the glass panel.
Acura did not include a defroster grid, integrated rain sensors, or camera brackets in this glass, keeping the electrical requirements limited strictly to the antenna grid circuit. The alignment pins molded into the glass frame snap into dedicated receiving holes along the unibody pinchweld. Because these locating pins shear or deform upon window breakage, the entire window assembly must be renewed rather than attempting to remount damaged glass with salvaged trim.
