Why does the rear quarter window of the new LaCrosse rattle?

[MacKingston]

The rattling noise from the rear quarter window of the new LaCrosse is caused by loose door screws or lifting brackets, or aging window glass sealing strips. Loose door screws or lifting brackets: When driving on bumpy roads, the rattling noise from the car window glass is due to loose internal fastening screws or lifting bracket detachment. To fix this issue, visit a 4S shop to have the staff tighten the loose door glass. Aging window glass sealing strips: Aging door glass sealing strips are one of the reasons for window rattling. If the noise occurs in a new car, there's no need to replace the strips. Simply apply lubricant evenly on the strips and try raising and lowering the window several times to see if the noise diminishes. If the sealing strips are severely aged, they should be replaced directly.