We are currently leasing a 2011 acura mdx and are experiencing a pinging or engine knock at lower rpm. i had a service technician test drive the car and he recognized the noise and stated that acura is aware of the problem but does not have a fix for the problem. when i asked if there was potential damage happening to the engine, i was told not to be concerned. weeks and months later the noise is still apparent "sounds like a diesel truck" and i am beginning to feel a lack of power. i contacted acura customer service directly and i spoke to a customer service representative at acura that told me they are aware of the problem but there is still no fix from their engineers. i am reporting this issue to hopefully gain some traction for the acura engineers to focus their efforts on creating a solution to the problem. i have had great success with the acura brandin the past. however i am disappointed that i am being told that i have to deal with a premium suv that sounds like a diesel truck. *tr