What causes severe water accumulation under the rear seats of a 2012 Tiguan?
2 Answers
Introduction to the causes of severe water accumulation under the rear seats of a 2012 Tiguan: 1. Damage or blockage in the vehicle's air conditioning drain pipe, which directly discharges water into the interior. 2. Leakage from the vehicle's sunroof. 3. Poor sealing of the vehicle's doors or damage to the door panels. Additional information: If the water accumulation under the rear seats is due to human factors, it can be promptly wiped clean, which will not significantly affect the vehicle. If the water ingress is caused by a leaking sunroof, the sealing strips of the sunroof should be inspected. In case of aging or damage, timely replacement or repair is recommended.
Last time I helped my neighbor check their old Tiguan, I encountered the same issue. Lifting the seat revealed the carpet was completely soaked. Focus on checking four key areas: the ends of the sunroof drain tubes might be clogged with mud, causing water to flow down the A-pillar and under the floor mats; then inspect the rear door seals—if the rubber strips are aged, they may have gaps, allowing rainwater to seep into the door panels along the window; next, check if the trunk seal is deformed, as water can backflow into the spare tire well during car washes; finally, examine the AC drain outlet—if the plastic tube is detached, condensation water will leak into the cabin. Shine a flashlight and inspect these areas carefully—chances are, you'll find the leak.
