Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2007 Acura MDX owners, lightly cleaned up (personal details are redacted by NHTSA).
The driver's seat wiring harness on my daughter's 2007 Acura MDX has failed under normal operating conditions. The physical adjustment and movement of the driver's seat causes the factory wiring harness to over-tension and fracture internally. This has resulted in an intermittent, escalating failure of the Supplemental Restraint System (SRS), throwing diagnostic trouble code DTC 71-11 ("open circuit in the driver's seat position sensor"). This is a known manufacturer engineering defect documented under Acura Technical Service Bulletin TSB 11-023. This defect poses an immediate safety hazard because the vehicle's computer automatically disables the driver's side airbag safety deployment when the circuit loses connection. …
I purchased a 07 Acura MDX 1 month ago with 115,500 miles and got the extended power train warranty. Hall Nissan pulled the vehicle off hall Acura's lot. They printed out a receipt from all the work Acura did before I bought the car, and ensured me nothing was wrong with it that it went through a 150 point inspection. I took it to Acura 2.5 weeks after I bought it because the check engine light came on and a tranny code popped up. They diagnosed the car and found $7,000 worth of malfunctioning equipment. Transmission range sensor, both front struts, ac coil and magnetic clutch, front cv axle boot leaking, rear shocks, rear sway bar bushings, transmission cooler hose leaking. I have spoken with numerous managers about this, they wont replace the cv axel assembly (suggested fix), the transmission cooler line (suggested fix), or front struts or back shocks which failed upon inspection. …
I own a 2007 Acura MDX which has had a number of intermittent electrical problems over the years. I had to replace the handsfree link module a few years ago at the dealer. The yellow check oil level light has come on for no reason for years. It goes on for a second then off. A few months ago the entire electrical system 'fried' and I had to buy a new battery and new alternator. Recently I hear a buzzing sound when I use the turn signals and the hazards do not work at all. Last night the car died on the interstate- the instrument panel went dark, the engine would not accelerate, and I was lucky to be able to get onto the shoulder. I turned off the car and then started it again. When it works there is no problem with the operation but this car is now unreliable and dangerous. …
This is the third time the electrical system has failed caused by "battery drainage". Local repair shops do not know how to fix problems, but dealer's and Honda mechanics are very familiar with this horrible problem. Everyone fixing the problem knows very well this should be "a recall" matter, and creates a great road hazard as well are garage fires and loss of life. The things involved are "blue tooth" modular, air conditioner clutch relay, fuses. Regarding the blue tooth, this modular gets very very hot, and could cause a fire!! When the battery fails to charge while driving to get safely off the highway is very dangerous, much worst at darkness!! Honda needs to get their act together and recall and fix these problems now. …
Several times, the electrical system shuts off while driving. I was lucky to be in the neighborhood and not on a highway. The dealer stated there is a problem with the Bluetooth and we have had it replaced. This is the second time this has occured. The first time it happened, the Bluetooth was under Acura warranty. It was explained to me that the Bluetooth is drawing energy constantly and the dealer suggested we disconnect it to avoid the same issue happening again. But that is the reason I had bought the car in 2007. It had integrated Bluetooth. The times the car off while driving luckily was at a traffic light and in our neighborhood. I just hope it does not happen while we are on the highway. Acura also stated that maybe the wiring to the battery was stretched and I had to pay to replace it. I have never had to replace that wire. …
I've experienced several electrical issues electrical with my vehicle the most troubling was the vehicle completely shut off on the highway then immediately restarted!!!! In addition to this, the next issue is battery performance. The battery is constantly drained. In the 11 years that I owned the vehicle, the battery has been replaced 4 times. (I initially thought this was associated with my Bluetooth being connected but I've disconnected this many years ago and the issues still persist. I was strained on winter because the battery drained and was stuck at the airport for 3 1/2 hours waiting for aaa. Lastly, I turned my car on this past Sunday when my MIL display "check transmission." I brought the car to Acura for service and they have informed me that the gear position sensor must be replaced. This is another electrical circuit problem of a mechanical problem with the transmission. …
Had a big rain storm the other day. Got into my car after it being parked at work all day and found it was leaking from "c" pillar. Turns out, sunroof decided to flip up on its own during the day with the car parked and off. Took car to my local shop who has been familiar with Acura electrical problems. I told him to disconnect the wires to the sunroof function completely. I dont need to use the sunroof or have it decide to open on its own again. This problem could have caused even more serious electrical problems, but luckily water did not penetrate to the other electrical systems. This is the third major electrical problem I have had with this vehicle. There are serious electrical problems with the MDX and acrua/Honda refuses to issue any recall or even address the problems, which are prominent in this vehicle
Car constantly loses power or get warning light stating I need to check my starting system. Have replaced the battery 3 times this year, replaced the alternator twice and have replaced the starter once. Sometimes car does not lose power all the way, but will lose functionality of windows, turn signals, windshield wipers, radio, ac and any other function although car will still drive. Inside the arm rest is usually extremely hot when this happens. So hot that it burns your hand to the touch. After reading over 20 complaints on this same type of issue, it seems to be caused by the handsfree link in the car, which I have not been able to use because it stopped working completely back in March 2014. This issue needs to be recalled before someone is seriously injured or worse!
I bought this car on mother's day 2017. During the following month I had the check engine light on non-stop, I started receiving error codes, then on the way to the airport (one the interstate), the car literally turned off. We rolled to the airport with no electrical system at all, then the car finally died, thank goodness we got out because for a few minutes we were locked in the car! We replaced the alternator, the battery, 3 of the 4 (o2) oxygen sensors, now the transmission light, the check engine light and the check starting system light are on. Today, the car didn't start twice and I honestly felt at risk just trying to drive home today. So all this has been from mother's day 2017 to now! September 20, 2018. The lights and codes don't stop on this car!
Over the past two years have had to inexplicably jump MDX when it fails to start, usually after sitting over night. (confirmed no auxiliary power left on.) will be fine for a period of time, and symptoms reappear. Have now changed battery twice in past year. Four months after most recent battery change, battery was dead again. This time after jumped the car threw some additional warning lights around charging system. After trying to return to the parking space, the car started was not driving properly, seems to be electrical. After reading forums online my symptoms match very closely to others that have a handsfreelink issue on this model MDX. (parasitic power draw.) contacting Acura today, as this time the car is not drive-able.
Electrical complaints in other MDX years
Frequently asked questions
How common are electrical problems on the 2007 Acura MDX?
NHTSA has 51 complaints about the electrical system of the 2007 Acura MDX, 52% of the model year's 99 complaints. The component named most often is horn (1 mentions).
Is there a recall for 2007 Acura MDX electrical problems?
No. NHTSA lists no electrical system recall for the 2007 Acura MDX. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2007 Acura MDX electrical problems start?
Half of the complaints with a recorded mileage happened before about 100,000 miles, and 8% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 2 fires and 1 injury to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.