2017 Thor Motor Coach Palazzo Problems

I am reporting a serious and repeated safety defect involving Hehr side windows installed on my 2018 Thor Palazzo 36.1 motorhome (VIN: [XXX] ). Multiple operable side windows on this RV have experienced adhesive bond failure between the scissor arm/operator mechanism and the vent glass pane. This has caused windows to partially detach and violently flap while driving at highway speeds. One rear bathroom window completely detached and flew off the RV during highway travel in 2022. Additional adhesive failures have continued occurring from 2023 through 2025 involving: - Kitchen window - Living room window - Dinette window - Rear bathroom window (including replacement assembly) In several incidents, I was forced to pull onto the highway shoulder to perform emergency temporary repairs using tape and adhesive to prevent windows from fully detaching from the vehicle. In December 2025, while driving near [XXX] , the rear bathroom vent window again separated from the operator arm while traveling at highway speed despite prior repair work. The window was violently flapping in the wind and appeared at risk of completely detaching from the RV. This defect creates a serious road hazard because detached glass/window components could strike nearby vehicles or motorists. I am aware of prior Hehr/Lippert recalls involving adhesive-related window failures, but I have not found a recall covering this specific failure point involving separation between the operator arm and vent glass. The defect appears widespread across multiple windows on the RV and has persisted despite repeated repair attempts. I believe this issue warrants investigation and possible expansion of existing Hehr/Lippert window recalls. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

AS I was driving mr rv. down the road , the rear side window just fell off onto the roadway. I believe the window is made by lippert. On the rv forum there are a lot of people experiencing this same problem.

I am reporting a serious and repeated safety defect involving Hehr side windows installed on my 2018 Thor Palazzo 36.1 motorhome (VIN: [XXX] ). Multiple operable side windows on this RV have experienced adhesive bond failure between the scissor arm/operator mechanism and the vent glass pane. This has caused windows to partially detach and violently flap while driving at highway speeds. One rear bathroom window completely detached and flew off the RV during highway travel in 2022. Additional adhesive failures have continued occurring from 2023 through 2025 involving: - Kitchen window - Living room window - Dinette window - Rear bathroom window (including replacement assembly) In several incidents, I was forced to pull onto the highway shoulder to perform emergency temporary repairs using tape and adhesive to prevent windows from fully detaching from the vehicle. In December 2025, while driving near [XXX] , the rear bathroom vent window again separated from the operator arm while traveling at highway speed despite prior repair work. The window was violently flapping in the wind and appeared at risk of completely detaching from the RV. This defect creates a serious road hazard because detached glass/window components could strike nearby vehicles or motorists. I am aware of prior Hehr/Lippert recalls involving adhesive-related window failures, but I have not found a recall covering this specific failure point involving separation between the operator arm and vent glass. The defect appears widespread across multiple windows on the RV and has persisted despite repeated repair attempts. I believe this issue warrants investigation and possible expansion of existing Hehr/Lippert window recalls. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

AS I was driving mr rv. down the road , the rear side window just fell off onto the roadway. I believe the window is made by lippert. On the rv forum there are a lot of people experiencing this same problem.

The contact owns a 2017 Thor Motor Coach Palazzo RV. The contact stated while operating the vehicle, the rear marker light, and the driver side(left turn) signal were inoperable. The vehicle was taken to the local dealer to be serviced under the NHTSA Campaign Number: 21V00H000 (Electrical System, Exterior Lighting) which would address the failures but after the recall remedy was performed the failure persisted. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 26,000.