One problem related to ignition has been reported for the 2010 Acura MDX. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Acura MDX based on all problems reported for the 2010 MDX.
Ignition key can be removed when engine is turned off but car in is in a gear other than park. It has happened several times over the past month and the dealer service tech was able to replicate it today. I was quoted a repair cost of over $550 to replace key cylinder and rekey the door car to match "new" ignition key. As of today, I have not fixed the defect but am going to seek another estimate to repair.