2009 Acura MDX Transmission and drivetrain Problems
- Complaints
- 8about this part
- Share
- 15%of 52 total for the year
- Median mileage
- 51,415miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 8 complaints about the transmission and drivetrain of the 2009 Acura MDX, 15% of the 52 complaints for this model year. Where a mileage was given, the median is 51,415 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I brought the car into the dealer because I was having transmission problems or power steering problems. I indicated that the car makes a whine at about 1500 RPM. The dealer chose to treat it as a power steering problem. The power steering pump was replaced. There was still a whine although less. The car RPM hangs up on deceleration to a stop. Some times when going down hill the car does not upshift until the car is accelerated even though the road slope is zero. …”
NHTSA complaint #10480630, filed 2012-10, 34,095 miles“I took my 2009 MDX into Acura dealer for shudder at 35-45 MPH at 68k. Service tech wrote up repair order as PCM update. They did not document the shudder complaint. Even tho I drove with service tech and then he drove also, verifying shudder. I had to go back 2nd time as PCM didn't take according to dealer and that's why shuddering continued after 1st PCM update. Now at 107k, shudder is back. Mdx out of extended warranty by 2000 miles and Acura/honda refuses goodwill repair. This is my second MDX. The torque converter needed replaced in my 2003 MDX. …”
NHTSA complaint #10627116, filed 2014-08, 68,735 miles“Engine oil pump (premature failure) - I own a 2001 tl and 2009mdx. On the MDX, I have found premature failure of oil pump. The vehicle has been driven less than 8000 miles per year and failed at 85000 miles. A leak over time could result in engine ceasing. On the tl, it took 225000 miles to replace the oil pump.”
NHTSA complaint #10985470, filed 2017-05“I just got this car in September and it is now throwing all kinds of different codes to the point where I can’t drive it sh-awd /check charging station / emission light etc”
NHTSA complaint #11596234, filed 2024-06“The contact owns a 2009 Acura MDX. The contact stated while driving at an undisclosed speed and approaching a stop sign, the accelerator pedal was depressed however, the vehicle failed to respond. The contact shifted the vehicle to neutral and back to drive and the vehicle responded slowly. The failure recurred several times. The vehicle was not diagnosed nor repaired. The manufacturer was not notified of the failure. The failure mileage was 150,061.”
NHTSA complaint #11423124, filed 2021-07, 150,061 milesRelated service bulletins
- 10049199Oct 19, 2012Acura: see document search button for owner letter. A software update for transmission is available for the torque converter lock up clutch where the judder is felt while…
Transmission and drivetrain: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 1 | 11% |
| 2025 | 6 | 5% |
| 2024 | 2 | 5% |
| 2023 | 12 | 27% |
| 2022 | 71 | 45% |
| 2020 | 21 | 9% |
| 2019 | 32 | 17% |
| 2018 | 23 | 14% |
| 2017 | 64 | 25% |
| 2016 | 113 | 30% |
| 2015 | 12 | 17% |
| 2014 | 27 | 16% |
| 2013 | 4 | 13% |
| 2012 | 13 | 17% |
| 2011 | 8 | 11% |
| 2010 | 5 | 11% |
| 2009 | 8 | 15% |
| 2008 | 3 | 6% |
| 2007 | 8 | 8% |
| 2006 | 38 | 44% |
| 2005 | 87 | 48% |
| 2004 | 77 | 45% |
| 2003 | 104 | 50% |
| 2002 | 125 | 61% |
| 2001 | 131 | 58% |
Other parts of the 2009 Acura MDX
18 complaintsEngine
8 complaintsExterior lighting
6 complaintsVehicle speed control
5 complaintsAir bags
4 complaintsEngine cooling
3 complaintsOther or unknown
3 complaintsWheels
3 complaintsLatches, locks and linkages
2 complaintsSeats
2 complaintsSteering
2 complaintsSuspension
2 complaints
← All problems reported for the 2009 Acura MDX
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology