my Volkswagen Passat B8 (2015-2022) is leaking water inside after rain what should I check

Solution

1. Preparation

• Gather all necessary tools and parts.
• Park the vehicle on a level surface.
• Disconnect the battery if working near electrical components.

2. Inspect and Clear Sunroof Drains

• Tools Required: Drain cleaning tool or flexible wire
• Locate the sunroof drains in the front corners of the sunroof.
• Use the drain cleaning tool to clear any debris or blockages.
• Test the drains by pouring water into the sunroof channel and ensuring it flows freely.

3. Check Door and Window Seals

• Tools Required: None
• Inspect the rubber seals around each door and window for cracks, tears, or signs of wear.
• If damaged, replace seals with OEM parts to ensure a proper fit.

4. Examine Cabin Air Filter Housing

• Tools Required: Screwdriver set
• Remove the cabin air filter cover.
• Inspect for any gaps or misalignment that could allow water ingress.
• Reinstall the cover securely after inspection.

5. Inspect Trunk Seals

• Tools Required: None
• Check the trunk seal for wear or damage.
• Look for water pooling in the trunk area, particularly around the taillights.
• Replace any damaged seals as necessary.

6. Verify Windshield Sealing

• Tools Required: None
• Check the windshield for cracks or gaps in the sealant.
• If the windshield is improperly sealed, consider having it resealed or replaced by a professional.