* Blocked drain tubes: These tubes are designed to carry water away from the windshield and sunroof (if equipped). Clogs from leaves, debris, or even sealant can cause water to overflow and enter the cabin.
* Leaking windshield: A cracked or improperly sealed windshield is a prime suspect. Water can seep through the seal and run down into the interior.
* Leaking sunroof (if equipped): Similar to the windshield, a failing sunroof seal can let water in.
* A/C condensate drain: The drain for the air conditioning system can become clogged, causing water to back up and leak into the car.
* Weatherstripping: Worn or damaged weatherstripping around the doors or other areas can allow water to enter.
To diagnose the problem, you'll need to carefully inspect these areas. Look for evidence of water stains, dampness, or standing water. It's often helpful to have someone pour water over the suspect areas (windshield, sunroof) while you're inside to pinpoint the leak's origin. Checking the condition of the drain tubes is also crucial. If you're not comfortable doing this yourself, a mechanic specializing in older vehicles will be able to diagnose and fix the problem.
