Why is there water under the front passenger seat of a sedan?

[LeAllison]

Water under the front passenger seat of a sedan may be caused by issues with the sunroof, poor body sealing, or the vehicle driving through water. Below is a detailed analysis of the reasons for water under the front passenger seat of a sedan: 1. Check if the sunroof drainage pipe is clogged: Pour water slowly into the sunroof drainage channel and observe whether the water drains or gets blocked. 2. Check if the car floor mats are waterproof: Use floor mats that have waterproof properties. 3. Inspect the door drainage pipes: Open the door, and you will find small holes at the bottom—these are the drainage holes. Check if they are clogged. If they are clogged, it can be a serious issue, and the door may need to be disassembled.