2009 Acura MDX Electrical system Problems
- Complaints
- 18about this part
- Share
- 35%of 52 total for the year
- Median mileage
- 72,500miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 18 complaints about the electrical system of the 2009 Acura MDX, 35% of the 52 complaints for this model year. Where a mileage was given, the median is 72,500 miles.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“My MDX has only 62,400 miles and today I got a message check starter system due to the hfl module is draining the battery. Luckily the car was in my garage at the time. I had to charge the battery so I could start the car. All the info I have read online states the the hfl module gets real hot and can cause fire. My garage is under my bedroom. This is a part made by johnson controls, Acura needs to recall this item.”
NHTSA complaint #10905961, filed 2016-09, 62,400 miles“I have accura MDX 2009.unable to open car door using my key.could not open trunk.both sides light signals do not work.called aaa service to open door.vehicle was stationary”
NHTSA complaint #11292143, filed 2019-12, 92,000 miles“Hfl module # 39770-stx-a011-m1 stopped working preventing connection to my cell phone. 2009 MDX with 92,004 miles. Called all the dealerships in my area and others on the internet and no one has the module. I was told by them it's on national back order for sone time now ( 2/5/2020 ) . Doing further research brought to light there is a 2016 or 2017 class action suit on this hfl module/system failing and draining power from the battery, causing premature failure of said battery, which also happened to me as well as no start conditions which also has happened to me. …”
NHTSA complaint #11307646, filed 2020-02, 95,000 miles“Bluetooth handfree link (hfl) in my 2009 Acura MDX was draining my battery. I had to call towing service a few times to start the vehicle. When I opened the compartment where hands free link device is located, I noticed that the device was extremely hot (fire hazard). Finally, it gave up after a while. This happened after my extended warranty expired at 100k miles. My state (state of illinois) requires using a hands free link while driving, so, I feel Acura should recall the hfl unit and replace this free of charge to comply with the state law. …”
NHTSA complaint #11066751, filed 2018-02, 110,000 miles“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!!!! …”
NHTSA complaint #10823427, filed 2016-02, 60,000 milesRelated service bulletins
- 10237044May 17, 2023Service 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…
- 10207004Jan 25, 2022ServiceNews 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"…
- 10043249Jan 12, 2012Acura: update on some model vehicles regarding testing of alternators with the gr8 alternator/starter tester (ast) module that is installed on gr8 diagnostic battery station.
- 10041670Oct 15, 2011Acura: after vehicle parked for a time, a/c blows warm air or battery dies out or both.
- 10040495Aug 6, 2011Honda acura: the air bag light is on with a stored trouble code. The driver¿s seat wire harness has an open circuit.
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 3 | 33% |
| 2025 | 54 | 47% |
| 2024 | 12 | 29% |
| 2023 | 8 | 19% |
| 2022 | 20 | 13% |
| 2020 | 41 | 18% |
| 2019 | 42 | 22% |
| 2018 | 28 | 17% |
| 2017 | 46 | 18% |
| 2016 | 38 | 10% |
| 2015 | 15 | 21% |
| 2014 | 27 | 16% |
| 2013 | 8 | 27% |
| 2012 | 13 | 17% |
| 2011 | 7 | 10% |
| 2010 | 9 | 20% |
| 2009 | 18 | 35% |
| 2008 | 8 | 16% |
| 2007 | 51 | 52% |
| 2006 | 8 | 9% |
| 2005 | 18 | 10% |
| 2004 | 21 | 12% |
| 2003 | 18 | 9% |
| 2002 | 12 | 6% |
| 2001 | 6 | 3% |
Other parts of the 2009 Acura MDX
8 complaintsTransmission and drivetrain
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 29, 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