Plugged Moon Roof Drains May Cause Water Leak on Honda Accord

Problem Description and Possible Solution

Plugged moon roof drains can cause a water leak inside the car. The water will usually leak onto the driver's or passenger's head when the car turns a corner.

Problem Data
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Average mileage: 126,932 (30,000–267,836)
21 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
75 people reported this problem
Viewing 1 - 20 of 27 comments
Wet in driver's side floorboard ... no windshield leak. Continues to have a small puddle on drivers side after every rain.
Water in rear passenger seat. Think sunroof is leaking. Could drain holes be plugged. How do you unplug them. Where are they located?
After a long day of rain, the inside passenger side of my 2001 Accord LX was soaking wet. The water splashed into the console and the seat and door and floor on the front passenger side was soaking wet. First time this happened. Assuming I closed the sunroof all the way, which I believe I did. hmmmm. Now the car smells funny. Please help.

Addition: The inside ceiling between the sunroof and the door was all wet. above the door.
The problem was: very wet floorboards in front (and possibly also rear) of the car. This produced a very bad odor that persisted for a long time. At first I thought it was a windshield problem. Rather, there was an issue with the sunroof (moonroof?) hose. Either it was disconnected or clogged. A local Honda dealership repaired it; took two visits, the first visit didn't quite "take."
If car is left outside and it rains,water leaks under dash and front door post on drivers side,all the time!
water in trunk under spare tire. source of leak found to be left and right trunk to quarter panel body seams. Resealed over factory seal with RTV type caulking. Also, checked and cleared moonroof drain connections to the wheel wells.
A year later found water in right rear passanger foot well. No clue yet where this is coming from.
Use a long nylon extension attached to a compressed air gun. There are 4 drain holes in the sun roof drip pan; 1 in easch position: The right & left front and the right & left rear. Open the sun roof. The fronts are easy to locate and blow clean. The rear drain ports you will need to "fish for" but are easy to locate & you will feel then the tip finds the openiing. Simply insert the blow gun nozel into the drain hole & blow for 5 seconds to remove debris covering the drain exits in the wheel wells.
Water on passenger side floor after rain. Windshield checked out ok. Believed to be moonroof drain.
Same deal, after a rain water will fall on driver and passenger side when braking or turning a corner
Water leaking in driver's side at pillar area seam and also water coming up through carpet on front driver's side. Took it to the dealer to be fixed - however, next rainstorm the leaking problem continued. I took it back to the dealer again today - we'll see if they fix it correctly this time.
Water leaking on driver side, resulting in soaked floor mats. I blew out the drains on the moonroof and leaking stopped, but it has started again. I think I I'll use a compressed air nozzle this time. Not totally sure this is the final solution to the problem.