Bought the car brand new off the lot. It started having issues soon after purchase. Took it back to the dealership and treated me as if I was a crazy female driver. Was told that our purchase included oil changes for the first year and a 100,000 mile warranty, which they conveniently couldn't find and we moved so I can't find our paperwork. Issue has only gotten worse over the years. It acts like it doesn't know which gear it wants to be in. It causes a shudder feeling like you are driving over rumble strips. After searching on the internet, I find that the transmission, torque converter, and transmission software has been a problem for years in the Mdxs, but I never received a recall notice. According to the recall letter that Acura sent out to other people, they call it a transmission judder. I am calling a new dealership for an appointment and plan on making a mechanic ride with me to prove what's going on. I should not have to pay for the repairs. Your system wants me to enter a date for then this happened. It began in October of 2009, has been ongoing, and has gotten worse. The car had 21 miles on it when I drove it off the lot. Now it has 120,000+. the issues being on acceleration and continues until at least 60mph, even at higher speeds if I take my foot off the accelerator in traffic or try to go up a hill until the next gear kicks in because it is sluggish when you press the accelerator down even to the floorboard.

- Ethridge, TN, USA

I have been a proudly Honda/Acura customer for last 20 years. In November, my wife Acura MDX 2010 which has transmission fluid changed every 9000 miles / 1 year and less than 50000 miles on odometer suddenly had strong shudder/vibration ( like another is hitting behind or the car itself is running over the big rock) and it was struggling to go over 40 mph when pressing on gas paddle. The issue was not reproducible at dealer after we turned off and on the engine. Today on December 17 2015, the issue happened again and we were able to show to the technician at South coast Acura and the technician acknowledged it after test drive as well as noted that the transmission fluid smelled like over burnt oil. Still he still needs to perform different/additional diagnostic tests until tomorrow. The main reason that I bought MDX 2010 5 years ago is safety for my kids and my wife. If the issue is not identified and resolved tomorrow then I extremely worry about the safety for my family as they will have to continue to commute in unsafe car which cannot deliver its basic driving function normally. I hope Acura would step up to replace transmission/torque even if diagnostic test will or will not identify the root cause as I strongly believe it is a sign of bad transmission and/or converter together based on my research via online forum.

- Garden Grove, CA, USA

Car shutters between 1500-1800 rpms. Also "pops" when it down shifts. Took it into the dealership and they said the torque converter had to be replaced. I was told there was only one other vehicle that they knew of that this happened to and it was also a 2010. Since then, I went online to see what if anything a defective torque converter could damage and found out there were many, many complaints for years. It appears that Acura has an issue with the torque converter that needs to be addressed.

- Kaukauna, WI, USA