What Causes Water Accumulation in the Trunk?
2 Answers
The reasons for water accumulation in the trunk may include clogged sunroof or trunk drainage pipes, or blocked rear drainage outlets. Below is an introduction to the trunk: Items in the trunk: The trunk usually contains the car's spare tire, emergency kit, vehicle tool kit, warning triangle, fire extinguisher, car refrigerator, and the emergency fuel cap release cable. Some high-end models also have the starter battery located in the trunk. Certain SUV and MPV models may also come with an original emergency flashlight. Reasons why the trunk won't open: Issues with the linkage rod or lock cylinder. If you frequently use a key to open the trunk, the linkage rod may be broken, and you should visit a repair shop. If you always open the trunk manually, the lock cylinder may be dirty or rusty. Spraying rust remover into the lock cylinder a few times can help open it. Failure to unlock: If the remote key isn't used to unlock the trunk, it may be difficult to open. Before attempting to open, it's best to press the unlock button on the key or check if the key battery is dead. Mechanical component failure: The trunk itself may have issues, such as broken wiring or other problems that prevent it from opening.
I often help people repair cars at the auto shop, and water accumulation in the trunk is quite common, mostly due to aging sealing strips. The rubber strip around the edge of the trunk door can crack and deform over time, allowing rainwater to seep through the gaps. Another main cause is clogged drainage holes. There are several small holes in the trunk floor designed for drainage, but leaves, dirt, or sand from car washes can easily block them. It could also be due to failed sealant around the rear windshield or taillights, allowing water to sneak in. Water accumulation not only soaks the carpet but also leads to mold and unpleasant odors. Over time, it can cause the floor to rust, corrode wiring, and even compromise the overall safety of the car. I recommend checking the condition of the sealing strips every three months and replacing them if they’re worn out. Clean the drainage holes monthly by poking them with a small stick. Avoid directing high-pressure water jets at the seams during car washes, and address any issues promptly. If water accumulates, use a vacuum or dry cloth to soak it up first, then visit a professional repair shop to fix the seals properly.
