Two problems related to battery dead have 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.
Bluetooth stopped working and a few weeks later, my car wouldn't start. I replaced the battery and a few days later the car stalled on me as I was pulling out of my spot!!!!! I went to the Acura dealer and explained to the guy that my battery kept draining. He asked me if my bluetooth stopped working, I was shocked because I hadn't mentioned any issues with my bluetooth but I let him know that in fact, the bluetooth had stopped. The rep said it's a common problem in my vehicle. Had to replace the bluetooth and paid $600!!!! my friends sister has the same make car and her bluetooth stopped working and her car battery keeps going dead. It's very scary since apparently I must have started the car right before the battery died again. Imagine what would've happened if it had stalled on a highway or a busy street!.
Approximately 3 months ago I went to start the medic and it would not start. No lights or any other accessories were left on. The car was jumped and started. Being the car was 4 years old and I had reviews of battery problems in the medic, I had the battery replaced. About two weeks later it would not start again. It was jumped again and taken to an auto repair shop to be tested. The repair shop said the battery was weak, so it was replaced again. It's been about 2 months now and today when I went to start it, the battery was dead again. Three batteries do not go bad that quickly, there is a problem with the electrical system in this vehicle. I have noticed other complaints with this same issue on this web site.