2016 Acura MDX: complete transmission failure

Filed Apr 27, 2026 · Engine · GA

My 2016 Acura MDX (purchased new January 2016) has a confirmed failure of the 9-speed automatic transmission warmer (ATF warmer), causing engine coolant and ATF fluid to cross-contaminate. The failed warmer is still in the vehicle and available for inspection. In the last week of March 2026, I noticed the engine cooling fan continuing to run after shutting off the vehicle — an abnormal symptom that prompted me to bring the car in for service. No check engine or transmission warning lights were illuminated. On March 28, 2026, Blue Sky Tire and Auto (Cumming, GA) performed a diagnostic inspection confirming coolant and ATF cross-contamination. The technician also physically inspected the transmission warmer manufacturing date stamp, confirming it falls within the defective manufacturing date range identified in Acura Service Bulletin 17-009 (October 6, 2017), which states that improperly manufactured warmers allow coolant and ATF to mix, potentially causing permanent engine and transmission damage. The vehicle has not been inspected by an Acura dealership for this failure. However, an American Honda Customer Relations case has been opened (Case # XXX) with a case manager assigned to evaluate the warranty claim under the 10-year/unlimited mileage warranty extension issued by American Honda for this exact defect. This failure poses serious safety risks — loss of transmission lubrication can cause sudden transmission failure at speed, and coolant-ATF mixing can cause engine overheating, both potentially resulting in loss of vehicle control. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Dec 16, 2025 · Transmission · GA

This submission supplements my existing the federal safety agency complaint regarding Recall 17-010 and the 9-speed automatic transmission ATF warmer defect. My vehicle received Recall / Product Update 17-010 service on March 10, 2017, at which time the transmission was replaced. The final redesigned ATF warmer did not exist at that time. The ATF warmer installed with the replacement transmission was an earlier design. The vehicle returned for a second Recall 17-010 service visit on December 9, 2017. The service record from that visit explicitly states that the ATF warmer was not replaced, noting that it had been replaced during the prior visit. As a result, the recall was initiated but not completed with the final redesigned ATF warmer. Acura later issued TSB B17-026, extending warranty coverage to 10 years from original in-service date with unlimited mileage, because damage from ATF/coolant contamination may occur years after initial exposure, even if fluids later appear normal. In 2025, the vehicle developed transmission noise. An independent transmission specialist advised that the vehicle exhibits bearing failure, with the extent of damage unknown until teardown. Bearing failure is a known delayed consequence of ATF/coolant contamination associated with the ATF warmer defect. The vehicle was delivered to an authorized Acura dealership for evaluation under the warranty extension. However, the dealership has refused to perform the warranty inspection unless payment is made, and has stated that the vehicle is outside the warranty period, despite the warranty extension remaining in effect through January 2026. This supplement is submitted to document that: •Recall 17-010 was started but not completed with the final redesigned ATF warmer; •The final corrective part was never installed on this vehicle; and •Corrective action and inspection related to this incomplete recall and warranty extension are currently being denied.

Filed Feb 9, 2025 · Acceleration, Engine · 43,000 miles · NJ

My Acura mdx 2016 is well maintained, only 42500 miles,bought brand new from dealer, problem started 6 months ago, accelerator, rpm goes up even on 20 miles driving, and car just stops and gear goes to park mode..dealer inspected, they said transmission needs to be replaced, contacted NCDS, their respond I passed the warranty of 7 years, not covered. Dealer charging 7100 to fix issues.

Filed Jun 13, 2024 · CA

[XXX] 7 pm. As I was on the highway, warning lights came on the dashboard, “failing transmission, emission failure, and side mirrors failure.” I soon lost a lot of power. I purchased this 2016 Acura MDX in 2019 at Acura of Concord as a Pre-owned Certified with 20k miles. At the time of the transmission failure I had put an additional 17k miles. Total cost for a new transmission was nearly $8000. This does not seem fair to have to replace a transmission with so little miles. It seems as though this vehicle is a lemon. Approximately 3 weeks later, as I coming up the driveway, I noticed a huge chip of paint missing in front of the sunroof area. Now this appears Exactly as the recall or extended warranty demonstrates for 2014-2016 MDX White Diamond Pearl NH-603P. Honda claims this “VIN Does not qualify” for this extended warranty. Even the service manager at Acura of Concord exclaimed, ”How they explain to me that this vehicle does not qualify when it is the same year model, same paint, and that the paint chipped off Exactly the same way as described in the extended warranty recall.” In other words, Honda is forcing me to reach out to you because this VIN is not on the list and they do not wish to acknowledge that they are at fault. I do not feel that it right that I paid $8000 for a new transmission, and now I will have to pay $5303.70 to repair the paint on the roof. Please help me in this matter. Thanks, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 10, 2024 · Transmission · 117,000 miles · OH

The contact's wife owns a 2016 Acura MDX. The contact stated while driving 60 MPH and depressing the accelerator pedal, the vehicle failed to respond and lost motive power. A message indicating a transmission failure was displayed. The contact was able to veer to the side of the roadway. The contact was able to restart the vehicle; however, the vehicle failed to shift into gear. The vehicle was towed to a AAA Center. The manufacturer was notified of the failure and informed the contact that the vehicle was covered under an extended transmission warranty. The vehicle was then towed to the dealer, where it was diagnosed that the transmission needed to be replaced. The dealer informed the contact that the vehicle was not eligible to be repaired under the transmission extended warranty. The vehicle was not repaired. The failure mileage was approximately 117,000.

Filed Jun 20, 2023 · Driver assistance, Transmission · WA

I have a 2016 MDX v6 88k miles and I purchased the car as a Certified Pre Owned (CPO). I recently had two lights come on 1) Blind Spot Info System Problem and 2) Transmission System Problem. The car has been driving fine and has been well maintained. Since the lights came on, I've put about 8000 miles on it over the last 6 months and no change to the way it drives (transmission seems to work fine). It seems odd that both lights come on at the same time? Recently my family took a 150 mile trip and both went off during the trip but then did both come back on later that day. Looked on line and it seems many are having this exact issue. One of the websites I visited was - https://www.mdxers.org/threads/2016-mdx-transmission-system-problem-valve-issue-blind-spot-info-system-problem-light.178519/ . I can provide more links to websites if needed. The dealership wants us and others to pay for a new transmission and installation charges. It seems odd that most if not all are having these issues just after the warranty expires. Reminds me of that issue with Volkswagen a few years ago when they would pass emission test when they went to get tester because the computer was programmed to recognize the driving habits of being tested but the other 995 of the time it failed. Also seems odd that cars made in 2016 have a shorter life span than cars built in 1980's. My vehicle is currently in for service at the local dealership (Acura of Seattle) and they want me to pay $8000+ for a new transmission.

Filed Jul 24, 2022 · Driver assistance, Transmission · VA

Transmission issues with my 2016 Acura MDX slipping into neutral and staying there while driving at high speeds on interstates. This could've caused injury to myself, my passengers, and other drivers on the road due to the high speeds. Without being to able to accelerate when needed, it could've resulted in harm. Transmission Service Problem and Blind Spot Malfunction lights appeared. I took the vehicle to Acura for service 3 weeks before the last incident and Acura said there was no problem and to bring it back if it happened again. 3 weeks later, it happened again. I had reported slippages in the transmission for several service checks with no issues found by Acura. After the most recent incident, Acura recommended to either keep driving and bring it back or replace the transmission. Diagnostics were run and error codes cleared. The CSR at Acura mentioned he saw this on at least 5 Acura 2016 MDXs this year already. The warning lights did not appear until the last issue. Several other incidents occurred with no warnings. All transmission maintenance activities have been performed.

Filed Jul 12, 2022 · Transmission · FL

I have had the vehicle since beginning of March and I noticed the transmission slipping. I had the transmission flushed which made the problem not as bad but it was still there. A couple weeks later the transmission started slipping hard again and I had the transmission replaced by the dealer. I take it home and its shifting all over the place and not accelerating. Acura did a reprogram and I picked it up and the minute I left the dealer, it started to do a hard shift/slip between 4th and 5th gear that is not going away after a new transmission was put in. I'm not getting any warnings or lights, just the hard shifting that has caused me to return to the dealer on 3 separate occasions and now will be a 4th time. This can be dangerous because I do not know what the car will do at any given moment while I am driving.

Filed Feb 13, 2022 · Driver assistance, Transmission · MD

My SUV would accelerate when going down hill and the message: “transmission system problem”along with “blind spot warning malfunction” would come on. Took to dealer the message went out. Will come on intermittently. This has gone on For past month. They sai it had to stay on for them to diagnose. Now car will not go in reverse at all. This transmission was replaced November 2019 because of a defect. They told me there is no recall but the other was a service bulletin that required my engine to be replaced as well. If there is a class action I want to be added as this is a big inconvenience and the company is denying there is an issue with the transmission computer system so they can get us to pay high repair fees. Please help!

Filed Oct 13, 2021 · Electrical, Transmission · LA

I believe my transmission or the electrical component(s) to my transmission failed. I was driving down the road and all of a sudden my car shifted into neutral and would not allow me to accelerate so we had make our way to the shoulder to put the car in park. Having my vehicle thrown into neutral while driving and not being able to accelerate put not only us, but other drivers at serious risk! There were several warning messages popping up on our screen (see attached photos). In researching this issue, I found that there had been several TSBs and a class action lawsuit claiming the same issue faced by many drivers. It is currently at the Acura dealership getting serviced and they will be replacing the entire transmission and TCM harness under the CPO warranty. I cannot believe there has not been a recall on this potentially life-threatening issue.

Filed Oct 11, 2021 · Transmission · NC

Every since I've owned my 2016 Acura MDX I've had infrequent, and intermittent transmission issues. Several have been safety concerns: - Transmission is slow to engage when first pushing accelerator, leading to unexpected lag pulling into traffic - Transmission did not shift into park as expected, causing car to keep moving as I was opening door and starting to step out - Transmission slips and does not respond when accelerating to merge into fast lane on highway to pass slower traffic. Car speed stalls and you have to let off the gas and wait for a few seconds before the transmission reengages. - Overall horrible/hard shifting all the time... to which we're told... the car learns your driving style. We've reset it multiple times to try to get it to start learning again. No luck. - After coasting on highway, very hard shift with loud noise when you go to hit the accelerator All of these situations have happened numerous times over the past 2 years of owning this car. All of them infrequent, but also unexpected... leaving you to really worry if this is the time the transmission is going to let you down and cause you to wreck. Dealer now says a new transmission is needed, but I waited until 78,000 miles to first report it, so it's out of warranty now. Hoping Acura will step up and address this serious safety issue with the 9 speed transmission.

Filed Sep 15, 2020 · Transmission · 38,000 miles · SC

Zf9 transmission went out at about 10,000 miles with metal particles found in atf fluid. Replaced by acura with a new transmission apparatus. Apparently this is a rampant and dangerous problem with this model year transmission. Now at 38,000 miles (28,000 miles on the new transmission) this one is failing, slipping on shifts and making a squeaking/chirping noise between gears. Can result in failure to engage/accelerate in an emergency situation. Acura people won't take it seriously so the federal safety agency should get involved. A quick survey will demonstrate this is a common problem in this car. Acura has a tsb but this should be a recall item. They're trying to get beyond everyone's 6 year powertrain warranty without having to take action.