What are the reasons for water ingress in a sedan's trunk?

[Mabel]

Possible reasons for water ingress in a sedan's trunk include poor sealing of the trunk's weatherstrip, inadequate sealing of the taillights, improperly closed sunroof, or clogged drainage pipes. Trunk: It serves as the car's storage compartment, enhancing daily convenience. The trunk typically contains a spare tire, vehicle emergency kit, onboard tool kit, warning triangle, fire extinguisher, and the emergency fuel filler door release. Trunk maintenance methods: When cleaning, use a brush to remove dirt, including the edges and channels of the trunk. Installing a trunk liner can prevent dirt or liquids from entering and damaging the trunk surface, while also preventing items in the trunk from sliding, thereby reducing the risk of contamination or damage.