While driving on local road all of a sudden the 3 errors came on the dash board transmission system problem, emission system problem, and blind spot system problem, engine light came on. When this happens the transmission doesn't shift right and grinding of the gear is heard, car quickly slow down. After stopping and start up again, errors still there but transmission could not shift into higher…
2016 Acura MDX powertrain problems
moderate 108 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
108
Recalls
0
Avg fix
$2,500
1crash
When does it fail?
Of the 108 powertrain complaints filed for the 2016 Acura MDX, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Of the 17 model years of Acura MDX we track for powertrain problems, this one carries the most owner complaints on file — 108.
Powertrain accounts for 31% of every owner complaint on file for this vehicle — the dominant problem area across 11 categories tracked.
The failure pattern owners describe
Buyer takeaway: The 9-speed transmission in 2016 MDX models carries well-documented hesitation and lag problems from day one, followed by expensive failure later in ownership. Acura has issued multiple service bulletins and warranty extensions suggesting this is a design issue, yet dealerships often deny coverage or claim the behavior is normal—review complete service history carefully and budget for transmission replacement regardless of warranty status.
The 2016 Acura MDX 9-speed transmission is the centerpiece of complaints across the entire mileage spectrum. Owners describe two main failure patterns: early hesitation and lag (first days to months of ownership), and late catastrophic failure (30,000+ miles).
Hesitation comes first—the transmission stays in gear too long, or feels like it drops into neutral for 5-10 seconds at highway speeds before violently re-engaging. Owners report this happens when merging, accelerating from stop signs, or passing. Dealerships tell owners this is "adaptive" behavior or normal for the 9-speed, offer multiple software updates that don't fix it, then replace the whole transmission. Same symptoms return weeks or months later.
A known defect involves the transmission cooler/warmer device that failed on many 2016 models, allowing coolant to contaminate transmission fluid. Acura issued TSB B17-026 in 2018 extending warranty to 10 years/unlimited mileage. Multiple owners report dealerships refusing warranty inspections unless they pay diagnostic fees, despite the warranty extension being active.
Catastrophic failure includes complete power loss at highway speed, transmission metal-on-metal grinding, or sudden shifting into neutral that owners cannot reverse. Several owners report transmission fluid pouring out or visible mechanical damage. One owner's second transmission failed at 39,000 miles after first failure at 14,000 miles; another owner's transmission failed twice within 25,000 miles.
Additional concerns: multiple owners report software updates worsening the problem; dealerships claiming 40-50% of 9-speed MDX models develop the same metal-on-metal noise; and one engine rod bearing failure with seizure at highway speed. One owner reported an Acura dealership explicitly stating the problem is a known defect with no permanent remedy.
Same Acura MDX powertrain reports on nearby years: 2014 · 2015 · 2017 · 2018 · 2019
Failure modes owners describe
Transmission hesitation, lag, and erratic shifting
Owners report severe hesitation and lag when accelerating, especially at low speeds and during highway merges. The transmission either stays in a gear longer than expected or feels like it's in neutral for several seconds before re-engaging. Hard, jerky, or violent shifting is common. Some owners describe the car nearly stalling when trying to accelerate from a stop or low speed.
When: Typically occurs within first few months to years of ownership; 11,000 to 122,000 miles reported; some issues present from day one of new ownership
Symptoms owners cite: Hesitation and lag when pressing accelerator, especially at low speeds and highway on-ramps; Vehicle feels like it goes into neutral for 5-10 seconds at highway speeds before re-engaging; Hard, jerky, or violent shifting; uncomfortable lurching sensations; Engine revs high between shifts or during slow acceleration; Car nearly stalls when accelerating from stop or reduced speed
Codes mentioned: P2638, Transmission System Problem warning light, Check Engine light
Repairs/costs cited: Dealerships replaced full transmissions; owners report transmission fluid changes; TCM/PCM software updates performed multiple times without resolution; new transmissions installed, but same symptoms recurred
Recalls/TSBs owners mention: Dealerships told owners this is 'characteristic' of the 9-speed transmission, an 'adaptive transmission' that will improve with time, or normal operational behavior; software updates offered; TSB 15-034, 15-010, 19-003 mentioned; some owners report dealers stating no fix exists
Transmission warmer defect and ATF/coolant contamination
The 9-speed transmission warmer (ATF cooler) fails, allowing engine coolant to mix with transmission fluid. This contamination damages internal transmission components over time, including bearings. Damage can occur years after initial exposure even if fluids later appear normal. Acura issued TSB B17-026 extending warranty to 10 years/unlimited mileage but dealers refuse warranty inspections.
When: Initial exposure may occur early but damage manifests months to years later; reported failures at 80,000+ miles; warranty extension applies through 10 years from original in-service date
Symptoms owners cite: Transmission bearing failure symptoms: metal-on-metal noise at startup or during operation; Transmission noise described as chirping, squeaking, grinding, or loud metal spinning; High-pitch whining noise at engine startup; Transmission System Problem warning light; Vehicle loses power or acceleration at highway speeds
Codes mentioned: Transmission System Problem warning light, Check Engine light, Torque Converter Problem code (implied from repair descriptions)
Repairs/costs cited: Owners cite transmission fluid contamination with coolant; transmission replacements; attempted coolant/ATF line flushing; bearings requiring transmission replacement (complete unit replacement, not rebuild); TSB B17-009, B17-010, B17-026 warranty extension issued; some dealerships refuse to perform diagnostic without $138 fee despite warranty coverage
Recalls/TSBs owners mention: TSB B17-009 Product Update (Transmission Warmer); TSB B17-010 Product Update/Warmer Replacement; TSB B17-026 Warranty Extension (10 years/unlimited mileage); owners report dealerships initially installed older warmer design during recalls; final redesigned warmer not always installed; recall 17-010 incomplete on some vehicles; Acura refuses to add VINs to extended warranty despite confirmed defect; dealerships deny warranty inspections
Complete transmission failure with total loss of power
Transmission suddenly fails completely, leaving the vehicle unable to shift into any gear or move. Often occurs at highway speeds with multiple warning lights illuminating. Loss of power while driving creates immediate safety hazard. Some owners report transmission fluid leaking and mechanical parts visible.
When: Reported at 14,000 miles; 30,000+ miles; 117,000+ miles; catastrophic failure on second transmission at 39,000 miles after first replacement at 14,000 miles
Symptoms owners cite: Complete loss of power while driving at highway speeds; Vehicle unable to shift into gear after stopping; Transmission fluid pouring out; mechanical parts visible; Multiple warning lights illuminating (transmission, emissions, SH-AWD, brake system, power steering); Vehicle coasts to shoulder or unsafe location
Codes mentioned: Transmission System Problem warning light, Emissions System Problem warning light, SH-AWD System Problem warning light, Multiple simultaneous warning lights reported
Repairs/costs cited: Full transmission replacement required; transmission cannot be rebuilt on 2016 models due to parts unavailability; owners report $7,200+ replacement costs; some owners report same symptoms recurring after transmission replacement; one owner noted torque converter problem with no replacement parts available
Recalls/TSBs owners mention: No recall issued; Acura initially covered under warranty for some owners but denied coverage after warranty expiration; TSB B17-026 warranty extension exists but dealerships refuse to apply it; some owners report service managers admitting 9-speed transmission is a known defect replaced with 10-speed in later models
Transmission shifting into neutral at highway speeds
Vehicle unexpectedly shifts into neutral while driving at highway speeds, causing complete loss of acceleration and motive power. This is particularly dangerous when changing lanes or passing. Reengagement may take 5-15 seconds or may require restart. Often accompanied by multiple warning lights or can occur without any warning.
When: Reported throughout ownership; multiple occurrences on same vehicle; some vehicles experience this after software updates performed at dealerships
Symptoms owners cite: Sudden shift into neutral while driving; loss of motive power; Inability to accelerate when needed; Vehicle coasts and loses speed in traffic; RPM drops significantly (to around 1,000 RPM or zero) when pressing accelerator; Engine may rev but vehicle does not respond to accelerator input; Warning lights may or may not appear
Codes mentioned: P2638 code (appears after incidents), Transmission System Problem warning light (inconsistent presence), Check Engine light, Multiple systems warning lights (SH-AWD, Emissions, Blind Spot)
Repairs/costs cited: Dealership diagnostic inconclusive; software updates applied multiple times without fixing problem; transmission replacement recommended in some cases; owners report problem persists after software updates and transmission replacement
Recalls/TSBs owners mention: TSB 15-034 issued as temporary fix; software/TCM updates offered; manufacturers claim updates are not covered under warranty unless they are a recall; Acura stated this is safe to drive despite failures; some dealerships state no fix is available
Transmission lurching, surging, and uncontrolled acceleration during braking
Transmission lunges forward unexpectedly when decelerating, braking, or coming to a stop. Vehicle surges forward when driver removes foot from accelerator or during downshift. Cold weather exacerbates the problem. Owner reports car nearly hit pedestrians or other vehicles due to inability to stop smoothly.
When: Reported within first few weeks to months of ownership; worsens in cold weather below -20°F; recurring throughout ownership
Symptoms owners cite: Vehicle lunges forward unexpectedly when decelerating; Uncontrolled surging when foot is off gas pedal; Hard surging when car downshifts or comes to stop; RPMs remain high when coasting or braking instead of dropping; Transmission shifts violently with loud sounds; Cold weather makes symptoms significantly worse
Codes mentioned: No specific codes mentioned; dealerships claim no codes present
Repairs/costs cited: Transmission replaced; TCM/PCM reprogramming attempted; dealership acknowledged problem relates to fuel-saver feature but claimed warranty does not cover if service light is not on; owners describe behavior as dangerous regardless of dealer explanation
Recalls/TSBs owners mention: Dealership claimed behavior is 'adaptive transmission' characteristic and drivers need to adjust; later claimed it's normal 'fuel saver' feature; no recall issued; owners report being told Acura is trying to address via software updates
Transmission metal-on-metal noise and chirping at startup
Loud metallic grinding, squeaking, or chirping noise coming from transmission, especially at startup. Noise described as metal-on-metal or metal spinning on metal. Problem often recurs weeks to months after transmission service or replacement. Dealership initially cannot replicate noise but later admits to being characteristic issue affecting 40-50% of MDX 9-speed models.
When: Reported within first year of ownership; recurs after transmission replacement; emerges 6-8 months after service; at startup and during acceleration
Symptoms owners cite: Loud chirping or squeaking noise upon slight acceleration at low speeds; Metal-on-metal grinding noise at startup; Noise persists or returns after transmission replacement; High-pitch whining noise before engine starts; Clicking, thuds, and gurgling sounds when shifting at various times; Noise builds up after 6-8 months following service
Codes mentioned: Transmission System Problem warning light (sometimes accompanies noise)
Repairs/costs cited: Transmission replacement performed; dealership later claimed noise is characteristic of design and normal for 40-50% of all 9-speed MDX models; no permanent fix offered; owners describe noise as indicating internal damage like bearing failure
Recalls/TSBs owners mention: Dealership initially could not identify problem; after replacement, claimed metal-on-metal noise is characteristic trait due to transmission fluid buildup at bottom and fluid being pushed through gears at startup; no recall or fix offered
Engine rod bearing failure (connecting rod bearing seizure)
Rod bearing seizes or spins, causing loud terrible clanging noise and complete engine failure. Engine cannot be restarted. Multiple diagnostic codes for misfire and catalyst efficiency appear before failure. Power loss and acceleration trouble precede bearing failure.
When: Reported at 80,000+ miles; one case at around in-service period with early mileage accumulation
Symptoms owners cite: Loud terrible clanging noise from engine on freeway; Loss of power and acceleration trouble; Engine seizes; vehicle comes to sudden stop; Multiple holes punched in engine block from broken rod; Engine will not start after failure; Check Engine light with misfire codes before failure
Codes mentioned: P0430 (Catalyst System Efficiency Below Threshold Bank 2), P0306 (Cylinder 6 Misfire Detected), Check Engine light
Repairs/costs cited: Rod bearing failure confirmed by Acura Service Center; engine not repairable; bearings available in aftermarket but OEM replacement not accessible to consumers; one owner reported VIN not included in recall 23V-751 despite confirmed defect
Recalls/TSBs owners mention: Recall 23V-751 issued for certain 2016 MDX SH-AWD models but VINs appear to be arbitrarily excluded; Acura Client Relations refuses to expand recall or repair vehicles with confirmed bearing failure despite matching exact recall description
Transmission control module (TCM) and software faults
TCM glitches, computer resets, and software errors cause transmission to malfunction or enter limp mode. Dealerships attempt repeated software updates and TCM reprogramming. One dealership explicitly stated the problem is a known Acura failure with no permanent remedy available and likely to recur within 10 to 10,000 miles.
When: Reported throughout ownership; software updates performed 2-3+ times with recurring failures; glitches described as intermittent
Symptoms owners cite: Vehicle enters limp mode or limited operating mode after software glitch; Multiple warning lights illuminate simultaneously and then clear after restart; Transmission control module requires reset; Vehicle stalls or loses power after warning light cascade; Problem recurs after software updates
Codes mentioned: Computer glitch (generic description used), Multiple system warning lights (Transmission, Emissions, SH-AWD, Brake, Power Steering, Lane Departure, Hill Start Assist, Trailer Stabilization, Road Departure Mitigation), Transmission System Problem warning light
Repairs/costs cited: Software updates applied multiple times; TCM reprogramming performed; TCM replacement recommended in some cases; owners report updates worsening transmission behavior initially; one dealership reset computer and advised customer problem is known defect with no available permanent remedy
Recalls/TSBs owners mention: Dealerships offer software/TCM updates as temporary fix; one dealership explicitly told customer problem is known Acura failure with no permanent remedy and likely to recur in 10-10,000 miles; no recall issued; Acura claims vehicle is safe to drive despite failures
Transmission unable to shift into or out of gears; stuck in park or drive
Transmission gets stuck or refuses to shift into desired gear. Vehicle unable to move forward from stop or shift into park. Some vehicles randomly shift gears (e.g., reverse to park) without driver input. Emergency brake may be only way to secure vehicle.
When: Reported from day one of ownership; intermittent occurrences throughout ownership; at 30K-40K miles and beyond
Symptoms owners cite: Vehicle will not shift into drive when in park; Vehicle will not shift into park or reverse; Vehicle randomly shifts gears without driver input; Vehicle continues to move when park is engaged and foot brake released; Shift to park warning messages appear; Cannot lock vehicle when it will not shift to park
Codes mentioned: 'Shift to Park' warning message displayed, Transmission System Problem warning light
Repairs/costs cited: Dealerships initially unable to diagnose; owners video documented issue for dealers; transmission replacement recommended; one owner reported vehicle crashing into parked car in driveway when it shifted to drive on its own during reverse attempt with grandchildren aboard
Recalls/TSBs owners mention: No manufacturer response documented in these complaints; dealers claim unable to recreate or find issue
Synthesized from 108 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 7 most recent
This submission supplements my existing NHTSA 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…
Acura is refusing to address a serious problem with the engine and power train with the vehicle, this may have already caused accidents on other cars in other states. Please see the historical data which gives a complete audit of the issues I have had. 9/22/18 11 days- vehicle taken to the dealer and dropped for service, punch list of issues since purchase that needed addressed. Alignment…
The transmission on this vehicle is unsafe & the car surges uncontrollably driving downhill. My wife & I can no longer drive this car & our local oakland, ca Acura dealer has not corrected the problem - we have taken it in for correction several times. We have 3 kids so we can't drive around in an unsafe car & dont want someone else driving an unsafe car. Acura recently issued a warranty…
While in transit with just 15000 miles on the car the transmission system problem light illuminated. Car was immediately taken to dealer. This vehicle has a center console push button control for the transmission. The dealer said that there was residue in the controller most likely due to a spilled drink. The controller would need to be replaced and it would not be covered under warranty. To…
I purchased the vehicle on 10/29/15. The car is not driven on a daily basis so there was only a little over 200 miles when my husband noticed a leak while the car was parked on the driveway. When it was taken to the dealer, the technician has confirmed that it was a transmission leak. Gasket and cover will be replaced. The service advisor mentioned to me that there was service bulletin for…
This vehicle is affected by Acura’s 9-speed transmission warmer defect covered under: • TSB B17-009 – Product Update: Transmission Warmer • TSB B17-010 – Product Update / Warmer Replacement • TSB B17-026 – Warranty Extension: 10 years from in-service date, unlimited mileage These bulletins address failures of the transmission warmer that allow coolant and ATF to mix, causing internal…
Had powertrain trouble with your 2016 Acura MDX?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2016 Acura MDX?
It's a documented issue but not catastrophic. 108 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Across the 67 complaints that reported odometer mileage, most powertrain failures cluster between 16,000 and 59,000 miles, with the median around 34,000. A quarter of owners report trouble before 16,000; a quarter make it past 59,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2016/Acura/MDX.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.