One problem related to loud engine noise has been reported for the 2011 Honda Accord. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Honda Accord based on all problems reported for the 2011 Accord.
I purchased this vehicle in February 2015. The first thing that I had to fix was the axle ( output shaft ) seal leak which the Honda dealer did not want to repair even though the car only had 62,000. Also, it makes a loud noise in the back when I go over the speed bump which is coming from the suspension. In addition, whenever I took the vehicle to ntb for an oil change. The mechanic told me that the rear main seal needs to be replaced because it is starting to leak motor oil. And again, the Honda dealer does not want to honor the powertrain warranty on my vehicle despite the low mileage it has. Seems like I need to file a lawsuit against them.