Volvo S40 water infiltration during rain causing flooding under front seats on Volvo S40

Some Volvo S40 owners report experiencing water infiltration issues during rain, leading to flooding under the front seats. This problem may be caused by several factors, including clogged sunroof drains that allow water to leak into the vehicle, as well as blocked drain tubes that prevent proper water exit. Additionally, a faulty rubber hose underneath the glovebox can leak water onto the passenger side floor mat, contributing to the flooding. Some owners also note that excessive condensation from the HVAC system may exacerbate the issue. To mitigate these problems, it is recommended that owners clear any clogged drains, inspect and repair damaged hoses, and have the HVAC system checked for malfunctions. If the flooding persists, consulting a mechanic or car glass repair specialist for further assistance is advisable.