One problem related to wiring has been reported for the 2009 Acura MDX. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Acura MDX based on all problems reported for the 2009 MDX.
"nox sensor wiring harness chewed by mouse" per Acura dealership. There is no evidence of rodent damage or presence elsewhere in the vehicle. According to the Acura dealership, there was a problem with the prior models prior to 2009, but my particular car doesn't have the problem. The wiring has been covered by Honda rodent deterrent tape as showing in the pictures. I have contacted Acura/Honda dealerships, their extended warranty customer service and also the irrespective, Acura/Honda manufacturer customer service. The same thing happened to my other car (Honda odyssey 2009) within a span of one week with exactly similar presentation. When I requested information from the above sources, I was told that this was confidential information and is not available for customers and that is it is a rare event and not related to manufacturing defects and also there was no definitive trend in Acura/Honda(same company) nox sensor wiring harness chewed by rodents and have refused to cover it under extended warranty program to which I have subscribed/purchased. I have another entry regarding the other vehicle.