What are the causes of car door squeaking?

[VanAnderson]

Car door squeaking can be caused by: 1. Individual foreign objects inside the door trim panel, such as lighters, coins, or other items; 2. Loose trim panels or audio systems. This issue can be identified by shaking the panel by hand or pressing on the squeaky area while driving. If the noise stops, it indicates a problem in that area, which can be resolved by tightening the components; 3. Rusty door hinges, which are usually noticeable when opening or closing the door. The solution is to clean the hinges and apply some grease; 4. Aging door seal strips. Most door seals that haven't been maintained for a long time will have this issue. A good solution is to purchase a bottle of silicone grease for maintenance, apply it evenly on the seal strip, and wipe it off after an hour of absorption for effective results; 5. Poor contact, excessive gap, or insufficient lubrication in the door lock mechanism. Applying grease to the lock or wrapping two layers of waterproof tape around the lock pin can solve the problem.