One problem related to starter 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.
My Mdx has only 62,400 miles and today I got a message "check starter system" due to the hfl module is draining the battery. Luckily the car was in my garage at the time. I had to charge the battery so I could start the car. All the info I have read online states the the hfl module gets real hot and can cause fire. My garage is under my bedroom. This is a part made by johnson controls, Acura needs to recall this item.