2021-2025 Jeep Wrangler Heated Glass Tab TSB

Jeep has issued manufacturer communication TSB 9004003, dated May 20, 2025, to address concerns regarding the rear window defrost system in 2021-2025 Jeep Wrangler models. This bulletin specifically focuses on issues where the rear window defrost is inoperative due to a detached heated glass electrical tab, and also clarifies the nature of discolored gridlines on the rear window of hard tops. Owners experiencing an inoperative rear defrost or noticing changes to their rear window gridlines should be aware of the guidance provided in this document.

This communication is crucial for understanding the proper diagnostic and repair approach for the BACKLITE (Heated Liftgate Glass Assembly) in affected vehicles, identified by part numbers 68282133A$ and 68282135A$. It provides important instructions for technicians and owners alike, particularly concerning when a repair is necessary versus when a condition is considered normal. If you are experiencing an issue with your Jeep Wrangler heated glass tab, this information is highly relevant.

Symptoms

Owners of 2021-2025 Jeep Wrangler models might notice that their rear window defrost system is not functioning correctly. This inoperative condition is often linked to a detached heated glass electrical tab within the BACKLITE (Heated Liftgate Glass Assembly). Another common observation, particularly on hard tops, involves burned or discolored gridlines on the rear window. While the inoperative defrost is a functional concern, the discoloration of gridlines is addressed differently by this communication.

Important Warnings

This manufacturer communication, TSB 9004003, includes a critical warning for technicians and owners regarding the appearance of gridlines on the rear window of hard tops. It explicitly states: "For burned or discolored gridlines on hard tops, DO NOT change the complete Flipper glass assembly." The document further clarifies that "This discoloration is oxidation of the ceramic silver material and is normal. The Engineering standard call out the fact that this bus bar will change in color and is not a deterioration of the material or performance." This means that visual changes to the gridlines are expected and do not indicate a defect requiring part replacement.

Diagnosis / Trigger Conditions

The primary trigger for an inoperative rear window defrost is the physical detachment of the heated glass electrical tab. When this tab separates from the glass, the electrical circuit required for defrosting is interrupted, rendering the system ineffective. For the 2021-2025 Jeep Wrangler, this issue specifically affects the BACKLITE (Heated Liftgate Glass Assembly), identified by part numbers 68282133A$ and 68282135A$. In contrast, discolored gridlines are not a diagnostic concern for performance; they are a normal characteristic resulting from the oxidation of the ceramic silver material used in the bus bar.

Repair Procedure Summary

For 2021-2025 Jeep Wrangler vehicles experiencing an inoperative rear window defrost due to a loose or detached heated glass electrical tab, TSB 9004003 directs technicians to refer to a separate bulletin, TSB 23-007-25. This referenced TSB provides the detailed repair procedures specifically for reattaching a loose tab. Critically, this communication emphasizes that replacing the entire BACKLITE (Heated Liftgate Glass Assembly) is "not necessary to replace the glass assembly" when the issue is solely a detached electrical tab. The focus is on repairing the Jeep Wrangler heated glass tab rather than a more extensive and costly glass replacement.

Owner Action

If you own a 2021-2025 Jeep Wrangler and notice your rear window defrost is no longer working, especially if you suspect a detached heated glass electrical tab, it is recommended to visit your authorized Jeep dealer. They can diagnose the issue and apply the repair procedures outlined in TSB 23-007-25. It is important to remember that if you observe burned or discolored gridlines on your hard top, this is considered normal oxidation and does not require any repair or replacement of the Flipper glass assembly, as stated in TSB 9004003. Understanding this distinction can help prevent unnecessary repairs.

Source: NHTSA ID: 11018637