Having transmission issues with your Acura MDX? You’re probably wondering if there’s a recall that covers your problem. While the MDX has faced several transmission-related challenges over the years, understanding which model years are affected and what solutions exist can save you thousands in repair costs. This guide breaks down everything about Acura MDX transmission recalls, from the notorious ZF 9-speed issues to current investigations that might lead to future recalls.
The Troubled History of Acura MDX Transmissions
The Acura MDX has experienced a rocky road with its transmissions, particularly with models manufactured between 2016 and 2020. These model years featured the ZF 9HP48 9-speed automatic transmission that quickly gained notoriety among owners and mechanics alike.
The ZF 9-speed transmission has been described by some automotive experts as “probably the worst transmission put on a modern car”. This assessment isn’t without merit, as thousands of owners have reported issues ranging from minor annoyances to complete transmission failures.
Common problems with the ZF 9-speed include:
- Sudden shifting into neutral while driving
- Harsh, delayed, or hesitant shifts
- Complete transmission failures as early as 30,000 miles
- Chirping sounds during gear shifts
- Inconsistent performance across vehicles
For 2022 and newer models, Acura made a significant change by switching to an in-house designed 10-speed automatic transmission. This move came as a direct response to the ongoing issues with the ZF units.
Current Active Recalls (2024-2025)
Engine Stall Recall (25V-031)
While not specifically labeled as a transmission recall, there’s a major active recall that affects the drivability of many Acura MDX vehicles. Recall 25V-031 impacts 294,612 vehicles, including 2022-2025 Acura MDX Type-S models.
This recall addresses a software error in the fuel injection electronic control unit (FI-ECU) that may cause engine stall or loss of power while driving. Dealers will reprogram the FI-ECU software free of charge, with owner notification letters mailed on March 17, 2025.
Many owners initially mistake this issue for a transmission problem because the symptoms (vehicle losing power) can feel similar to transmission failure.
Display System Recall (25V-032)
A separate recall affects 9,221 2025 Acura MDX vehicles due to a programming defect causing the center information display to show a black screen when shifting from reverse. This affects the backup camera functionality, which some owners might initially attribute to transmission shifting problems.
The ZF 9-Speed Nightmare (2016-2020 Models)
The most problematic transmission era for the Acura MDX centered around the 2016-2020 models equipped with the ZF 9-speed automatic transmission.
ATF Warmer Defect and Warranty Extension
One of the most serious transmission-related issues affected 2016-2017 MDX vehicles equipped with the 9-speed transmission. Service Bulletin 17-026 addressed a critical defect in the automatic transmission fluid (ATF) warmer that could allow engine coolant and ATF to mix internally.
This contamination could cause:
- Engine overheating
- Poor transmission shifting
- Transmission chirping during 3-4 shifts
- Complete engine and transmission replacement in severe cases
In response, Acura extended the warranty to 10 years from the original purchase date with unlimited mileage to cover this defect. The warranty extension covers both current and subsequent owners, making it one of the most comprehensive transmission-related warranty extensions in automotive history.
Real-World Impact
For owners experiencing these issues, the impact has been significant. Forum discussions highlight that replacement transmissions can take months to arrive due to backorders and supply chain issues. Some owners report multiple transmission replacements within 100,000 miles.
One owner described their experience: “My 2017 MDX transmission completely failed at 68,000 miles. The dealership confirmed it was due to the ATF warmer issue, but I had to wait nearly 8 weeks for the replacement parts.”
The NHTSA Auto Start-Stop Investigation
The National Highway Traffic Safety Administration (NHTSA) has upgraded and expanded its investigation to include over 2.2 million Honda and Acura vehicles, including 2016-2025 Acura MDX models. This investigation focuses on the Auto Idle Stop (AIS) system failing to restart engines after automatic shutdown.
Key investigation details:
- Over 1,384 complaints received by NHTSA
- Four incidents resulted in crashes or fires
- Two reports of injuries
- Investigation upgraded to “engineering analysis” phase in 2025
Honda’s response has included service bulletins (TSB 23-008 and 23-009) providing a two-stage remedy:
- Programmed Fuel Injection software update
- If unsuccessful, replacement of starter assembly, starter relays, or valve adjustment
Honda also offered a 10-year unlimited mileage warranty extension for vehicles requiring component replacements. However, NHTSA continues receiving complaints from vehicles that already received these repairs.
This investigation could potentially lead to a major recall affecting multiple MDX model years in the near future.
The Connecting Rod Bearing Recall (2016-2020)
While not directly a transmission recall, Safety Recall 24-001 significantly impacts 2016-2020 MDX owners and represents one of the most complex recalls in automotive history. This recall affects MDX engines due to improperly manufactured crankshaft connecting rod journal dimensions, potentially leading to engine failure.
Recall scope:
- All 2016-2020 MDX models (all trims)
- Requires extensive engine disassembly for inspection
- May result in connecting rod bearing replacement or complete engine replacement
- Parts availability has been severely limited, creating long wait times
This recall is worth mentioning because engine problems can sometimes be mistaken for transmission issues, and vice versa. Additionally, the repair process is extremely time-consuming, with some owners reporting their vehicles being at dealerships for weeks or months.
Transmission Improvements: The 2022+ 10-Speed Era
Recognizing the failures of the outsourced ZF 9-speed transmission, Acura switched to an in-house designed 10-speed automatic transmission starting with the 2022 model year. This transmission represents a complete redesign rather than an evolution of previous units.
2022+ 10-Speed Transmission Benefits:
- In-house Honda/Acura design and manufacturing
- Significantly improved reliability compared to ZF 9-speed
- Better shift quality and responsiveness
- Proven track record in other Honda/Acura applications since 2018
Owner feedback indicates substantial improvements in transmission performance and reliability. Some owners report initial break-in period adjustments, but overall satisfaction is markedly higher than previous ZF-equipped models.
“The difference between my 2018 and 2023 MDX transmissions is night and day,” reports one owner. “The new 10-speed shifts smoothly and predictably, whereas my old one would constantly hunt for gears and occasionally slam into gear.”
Technical Service Bulletins and Ongoing Issues
Beyond major recalls, numerous Technical Service Bulletins (TSBs) have addressed MDX transmission issues:
- TSB 16-063 (2012-2015): Torque converter judder after software updates
- TSB 15-039 (2016-2017): Transmission end cover leaks on 9-speed transmissions
- TSB 15-034 (2016): Vehicle shifts into neutral with diagnostic trouble codes
Current Owner Concerns
2025 MDX Type-S Transmission Issues: Some 2025 MDX Type-S owners report inconsistent hard shifting during 2nd-4th gear transitions, with symptoms ranging from mild thuds to audible mechanical clunks. These cases are being documented by dealers using Acura’s diagnostic tablets for engineering analysis.
ZF 9-Speed Replacement Parts: Owners of 2016-2020 models requiring transmission replacement face extended wait times for remanufactured ZF 9-speed units, with lead times reportedly extending to several months.
What To Do If You’re Experiencing Transmission Issues
If you’re experiencing transmission problems with your Acura MDX, here are the steps you should take:
- Check your VIN for recalls: Use the NHTSA’s recall lookup tool or Acura’s owner portal to see if your vehicle is subject to any active recalls.
- Document all symptoms: Keep detailed records of when and how transmission issues occur, including any warning lights, sounds, or performance changes.
- Contact your dealership: Schedule an appointment with an authorized Acura dealer and provide your detailed symptom history.
- Verify warranty coverage: If you own a 2016-2017 model, ask specifically about the ATF warmer warranty extension, which provides coverage for 10 years with unlimited mileage.
- File a complaint with NHTSA: If your issue isn’t being resolved, file a complaint with NHTSA. These complaints help establish patterns that can lead to new investigations and recalls.
Financial Impact and Considerations
The transmission issues have created significant financial impacts for MDX owners:
- Complete transmission replacements can cost $8,000-$12,000 out of warranty
- Extended warranty coverage for ATF warmer issues provides crucial protection
- Resale values of 2016-2020 models may be impacted by transmission reputation
For Prospective Buyers
If you’re shopping for an Acura MDX:
- Avoid 2016-2020 models with ZF 9-speed transmissions unless comprehensive warranty coverage exists
- 2022+ models with 10-speed transmissions show significant improvement
- Verify warranty status for ATF warmer coverage on 2016-2017 models
- Check VIN eligibility for connecting rod bearing recall on 2016-2020 models
For Current Owners
Immediate actions:
- Verify eligibility for all active recalls using VIN lookup tools
- Ensure ATF warmer warranty extension applies to 2016-2017 models
- Monitor for auto start-stop failures and report to NHTSA if experienced
- Consider disabling auto start-stop manually as interim measure
Maintenance recommendations:
- Follow 30,000-mile transmission fluid change intervals religiously
- Address any shifting anomalies immediately while under warranty
- Document all transmission-related service visits for warranty claims
Transmission Maintenance Tips for Acura MDX Owners
Proper maintenance can extend the life of any transmission, even problematic ones. Here are key maintenance tips for MDX owners:
Fluid Changes
For the ZF 9-speed transmission (2016-2020 models), Acura recommends changing the transmission fluid every 30,000 miles. However, many owners and independent mechanics suggest more frequent changes:
| Model Years | Factory Interval | Recommended Interval | Approximate Cost |
|---|---|---|---|
| 2016-2020 | 30,000 miles | 15,000-20,000 miles | $300-400 |
| 2022+ | 30,000 miles | 30,000 miles | $250-350 |
Driving Habits
Certain driving habits can help reduce stress on your transmission:
- Allow the vehicle to warm up before aggressive driving
- Avoid rapid acceleration from a stop
- Come to a complete stop before shifting between drive and reverse
- Don’t “ride the brakes” while driving downhill
- If equipped with paddle shifters, use them sparingly
MDX Model Years to Avoid or Approach with Caution
Based on transmission reliability data and recall history, here’s a quick reference guide for which Acura MDX model years to approach carefully:
| Model Years | Transmission Type | Risk Level | Common Issues |
|---|---|---|---|
| 2016-2020 | ZF 9-speed | High | Failure, shifting issues, ATF warmer |
| 2021 | ZF 9-speed | Moderate | Improved but same design as earlier years |
| 2022+ | Acura 10-speed | Low | Few reported issues, vastly improved |
Getting Help Beyond Warranty Coverage
If you’re outside the warranty period and facing expensive transmission repairs, you still have options:
- Goodwill coverage: In some cases, Acura may offer “goodwill” repairs at reduced or no cost, especially if your vehicle has low mileage or you’ve been a loyal customer.
- Class action settlements: Several lawsuits have been filed regarding the ZF 9-speed transmission. Check if you might be eligible for compensation through existing settlements.
- Lemon law claims: If your vehicle has had repeated repair attempts for the same issue while under warranty, you may have a lemon law claim.
- Independent shops: Some independent transmission specialists have developed expertise with the ZF 9-speed and may offer repairs at lower costs than dealerships.
- Remanufactured transmissions: Consider a remanufactured transmission, which can offer significant savings over a new unit while still providing a warranty.
Transmission issues can be frustrating and expensive, but staying informed about recalls, warranty coverage, and your options can help you navigate these challenges more effectively. Whether you’re currently experiencing problems or just want to be prepared, this knowledge empowers you to make the best decisions for your Acura MDX.
