One problem related to engine exhaust system has been reported for the 2005 Honda Accord. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Honda Accord based on all problems reported for the 2005 Accord.
The catalytic converter went out just in time to evade the warranty on the car. My extended warranty wouldn't cover it. It went out at 82,000 miles and it's only covered to 80,000. I did hear that this was premature, but that it happens on the Honda Accords. The repair is pricey as I bought it in California and they have higher environmental standards (that part is good), so you can't buy an after market converter. The cost was $1,100 after installation. They nearly put the wrong one on in new mexico at the Honda dealership. Luckily, I called my old dealership in California as they were out of stock here and they said I had the incorrect part number.