2009 Acura MDX electrical problems

Filed Jul 21, 2026 · Electrical · 140,223 miles · FL

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.

Filed Jun 24, 2024 · Electrical, Lights · OK

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

Filed Jul 6, 2022 · Electrical, Engine · TN

While driving vehicle, all power shut off after all lights(airbag, tire, engine, etc. came on the dashboard) not able to start vehicle now at all. Has power but will not run, turn over, stay running, etc. has brand new battery so that’s not the problem no problems until today.

Filed Aug 2, 2021 · Electrical · NM

The battery has been drained on three separate occasions this year (2021). I replaced the battery after the first occurrence. Each time I have had to use a battery jump to restart the vehicle which sufficed to get it operating and return home. On the last occasion, the car started to display dash board warning messages before arriving at home after driving only 15 miles. This came with a fully charged battery installed to get the car restarted. Previously I could see no error codes, but following this latest incident the AWD error code 77-01 is displayed by an OBD reader. The vehicle began to run roughly and flashed many dashboard warnings as the battery began to draw down to zero power. Latest incident required a battery replacement instead of just a jump to restart.

Filed Feb 7, 2020 · Electrical · 95,000 miles · CT

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. So far no stall outs with the vehicle moving. I currently have a hfl module on order from acura and was told because their on back order it could be several months before they get their order. Also they want my old module which they added a $50.00 core charge to the price. Though there maybe just a few official complaints listed here just check the web. There is obviously a fault in these modules and the manufacture is either doing reverse failure analysis on the returned modules or wirse yet fixing the broken ones and sending them out as the replacements. Either way they obviously know is wrong with these modules. This module is not what is considered a normal attrition piece like tires, brakes, light bulbs , belts , hoses. When was the last time you planned on replacing a broken radio in your vehicle, you don't. I shouldn't have to plan or pay to replace my hfl module, quality control and manufacture loyalty to their customers is abismal.

Filed Dec 30, 2019 · Driver assistance, Electrical · 92,000 miles · NJ

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

Filed Aug 26, 2019 · Electrical · 70,000 miles · OR

The bluetooth module drains the battery when the vehicle is turned off and I am afraid that my vehicle could be turned off by draining the battery when running causing a safety issue. I have registered the case with acura customer server and have not helped me with the free replacement. The acura case number is [xxx] 2009 acura mdx awd VIN: 2hnyd28679h[xxx] [xxx] information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6).

Filed May 31, 2019 · Electrical, Transmission · VA

All door locks, windows, trunk, fuel door, and sunroof does not work

Filed Feb 3, 2018 · Electrical · 110,000 miles · IL

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. Will appreciate if the federal safety agency looks into this case and requires acura/honda to issue an immediate recall. This is a very common issue in many acuras based on my google search.

Filed Sep 12, 2016 · Electrical · 62,400 miles · IL

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.