One problem related to tank assembly has been reported for the 2004 Honda Civic Hybrid. The most recently reported issues are listed below.
Whenever im driving my 04 pilot there is a loud and disturbing thumping sound coming from under the car. . After speaking to Honda and taking the car in 3 times I was told this is a normal characteristic of the car and there is nothing anyone can do. After researching this issue I see that there are many owners withthe same problem but yet no recall is even in sight. The reason for the fuel sloashing noise is due to the long narrow shape of the inside gas tank. .