Why can't the rear window glass be raised or lowered?

[DeGiselle]

If the left rear window glass cannot be raised or lowered, it may be due to aging, excessive dirt, or deformation of the window seal (including the inner trim strip), which creates resistance when the glass moves up or down. Generally, for issues like aging or deformation, it is best to replace the seal with a new one, while excessive dirt can simply be cleaned. Below are some related details: Dirty window lift track: This is also a lubrication issue. Cleaning the window lift track and applying grease can resolve the problem. Check if the battery is low on charge. When the engine is off, raising or lowering the window consumes battery power. If the battery charge is too low, it may cause difficulty in operation. Motor malfunction: If there is sufficient power and no resistance, but the window still struggles to move, it is likely a motor issue. Window regulator failure: This includes faults in the window lift track, cable, or slider, etc., and may require replacing the window regulator. Improper window seal: Some vehicles may have improperly fitted window seals. In such cases, DIY adjustments using scissors or a knife to reshape the seal can be attempted.