1. Sunroof leakage: Cracking or aging of the sunroof sealing strip will lead to water leakage in the main cab.
2. Rain leakage due to waterproof glue failure: When waterproof glue fails, rain will enter the main cab from the switch.
3. Door leakage: The door waterproof strip cracks or falls off, which will lead to water leakage in the main cab.
4. Water leakage in the car's small water tank: The car's small water tank, that is, the heater box in the car, rusts, causing water leakage, which will also lead to water leakage in the main cab.