2009 Acura MDX problems & reliability
52 owner complaints filed with NHTSA for the 2009 Acura MDX. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
6 complaints report injuries (6 injured).
Federal crash records (FARS 2020–2023): 2009 Acura MDX vehicles were involved in 13 fatal crashes with 7 occupant deaths. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Electrical System → | 18 | 35% |
| Engine | 8 | 15% |
| Power Train | 8 | 15% |
| Exterior Lighting | 6 | 12% |
| Vehicle Speed Control | 5 | 10% |
| Air Bags | 4 | 8% |
| Engine and Engine Cooling | 3 | 6% |
| Unknown OR Other | 3 | 6% |
| Wheels | 3 | 6% |
| Latches/locks/linkages | 2 | 4% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 55,000 miles (middle 50% between 21,000 and 90,000 miles), based on 37 complaints that included mileage.
Complaints by incident year
What owners report
“No major incidents, hits, or bumps no off roading only drove on city roads and highways. Tread and all rubber on the outside half of the tire has completely seperated from the inner tire on a section.”
Tires · filed Jul 30, 2026
“Odometer Fraud. The contact purchased a 2009 Acura MDX. It was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of the purchase, the mileage was 117,500. At the time of the vehicle registration, it was discovered that the mileage was 140,223.”
Electrical System · filed Jul 21, 2026
“On Jan 21, 2025 the drivers side air bag deployed as I was driving. I did not hit or get hit by anyone or anything, I did not run over anything either the airbag deployed on drivers side from the front to the back of my Acura MDX it was sudden it was random Nd damn scary. I was injured from the impact of the air bag…”
Air Bags · filed Jan 30, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
35 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2009 Acura MDX. The 10 most recent:
Service News - The navigation clock and date are incorrect. This is due to a limited GPS receiver capacity resulting in rollover of internal chip memory. The rollover occurred on January 1, 2022 at 12:00AM local time
B23040A · Service Bulletin/Repair Instructions · issued May 17, 2023
ServiceNews Article - The clock shows the incorrect time. This issue is due to a limited GPS receiver capacity resulting in "rollover" of the internal chip memory; the "rollover" will occur on January 1, 2022, at…
B21120A · Service Bulletin/Repair Instructions · issued Jan 25, 2022
These SKUs are Exhaust Manifolds with Catalytic Converters. The customer communication requested return of unsold inventory due to a loss of CARB certification. These SKUs can no longer be sold as they do not meet CARB…
DOR-M3J3F-07 · Service Bulletin/Repair Instructions · issued Jun 3, 2020
Dealer message - Today, May 24, 2018, Acura is announcing a warranty extension for 2002-17 Acura vehicles. This warranty extension applies in cases where any of the replacement driver?s and/or front passenger?s airbag…
BBOM05242018901 · Service Bulletin/Repair Instructions · issued May 24, 2018
Service bulletin - navigation system information.
B05-018 · Service Bulletin/Repair Instructions · issued Nov 23, 2016
"reimbursement form - on some 2007 13 mdx and 2010 12 zdx vehicles located in cold areas, the front and rear active dampers may leak. While leaks on the rear active suspension are visible, the front active dampers are…
REIMBURSEMENT FO · Service Bulletin/Repair Instructions · issued Nov 21, 2016
"customer letter - on some 2007 13 mdx and 2010 12 zdx vehicles located in cold areas, the front and rear active dampers may leak. While leaks on the rear active suspension are visible, the front active dampers are…
CUSTOMER LETTER · Service Bulletin/Repair Instructions · issued Nov 21, 2016
Service bulletin - in cold areas, the rear active dampers may be susceptible to leaking. If an excessive amount of damper oil has leaked, the active dampers may make a clunk or a bang when driving on rough roads or over…
B16-022 · Service Bulletin/Repair Instructions · issued Nov 17, 2016
"service bulletin - in cold areas, the front active dampers may be susceptible to leaking. Since these dampers are mounted in an inverted position, the leak is not visible on the exterior of the damper. If an excessive…
B16-020 · Service Bulletin/Repair Instructions · issued Nov 17, 2016
Dealer message - Today, November 8, 2016 Acura is announcing four warranty extensions for model years 2007-2013 Acura MDX and model years 2010-2012 Acura ZDX vehicles to address Active Damper System(ADS) dampers from…
BCA11082016901 · Service Bulletin/Repair Instructions · issued Nov 8, 2016
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
No NHTSA recall campaigns name the 2009 Acura MDX in our current data. Recalls may apply only to certain VIN ranges — always confirm with a VIN check.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2009 Acura MDX?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 55,000 miles — budget accordingly if the car is approaching that mileage.