The IMA Battery on the 2003 Civic Hybrid is/was a flawed product.
My first battery failed at 42,000 miles ( at 7 years) and was replaced under warranty.
The second battery has failed with less than 27,000 miles ( at 11 years) and the dealer says it will cost me $3,684 to replace it with a rebuilt battery with a 3 year, 36K warranty.
So far, Honda and I have spent more on batteries than I have on fuel for this car.
With a 3 year warranty on a $3,684 battery, I'm planning on $1,000 per year battery cost going forward.
I carefully documented my battery failures and appealed to American Honda for some cost sharing on the third battery.
They said sorry but you're on your own, nothing, period.
I was very surprised they dropped me so hard.
We bought two new Hondas in 2003, but they'll be our last.
Expensive mistake buying the Civic Hybrid!!!!