my Ford Mustang S650 (2024-Present) is leaking water inside the cabin, why?

Solution

1. Preparation

• Gather necessary tools and parts before starting.
• Disconnect the battery to ensure safety.
• Ensure the vehicle is parked on a level surface.

2. Inspect and Replace Door Seals

• Sub-steps:
  1. Remove the interior door panel using a socket set and trim removal tools.
  2. Carefully pull off the old weather stripping and clean the surface.
  3. Install the new weather stripping, ensuring proper alignment and sealing.
  4. Reattach the door panel and test for water entry.

3. Clear Sunroof Drains

• Sub-steps:
  1. Open the sunroof fully.
  2. Locate the drain tubes (usually found in the corners).
  3. Use compressed air or a flexible rod to clear any obstructions.
  4. Test the drains by pouring water into the sunroof area to ensure proper drainage.

4. Inspect and Reseal Windshield

• Sub-steps:
  1. Check the windshield for visible gaps or cracks.
  2. If necessary, carefully remove any trim or molding around the windshield.
  3. Use a suitable adhesive sealant to reseal any gaps.
  4. Allow the sealant to cure as per manufacturer instructions before testing for leaks.

5. Check HVAC Drainage

• Sub-steps:
  1. Locate the HVAC drain tube (usually under the vehicle).
  2. Inspect for blockages and clear any debris.
  3. Test the system by running the air conditioning and monitoring drainage.

6. Inspect Firewall and Grommets

• Sub-steps:
  1. Check for any visible leaks around the firewall and wiring harness grommets.
  2. Apply sealant if any gaps or holes are present.
  3. Ensure all wiring grommets are properly seated and sealed.