2019 Acura MDX Problems

What owners report

Owners of the 2019 MDX most often report the engine shutting down or going into limp mode, the idle-stop feature failing to restart the vehicle, and the forward collision system braking on its own. Many of these complaints were filed at low mileage, though stalling and fuel-system concerns also appear at higher mileage and are frequently tied to open recalls for the fuel pump and the engine connecting rod bearing.

1. 1
   Engine

   Engine stall or loss of power / limp mode

   • 43 complaints (23%)
   • median 42,000 mi at 3.6 yrs old (17 state mileage)
   • 2 mention a crash, fire or injury
   • filed 2019–2026

   Owners describe the vehicle stalling, losing motive power, or dropping into limp mode while driving or accelerating, sometimes with several warning lights illuminated. Some say the vehicle could be restarted after a delay or by cycling the ignition, while others report the vehicle would not restart. Complaints note dealers often could not duplicate the failure; several mention open recalls for the fuel pump and engine bearing for which parts were not yet available. Reported from under 5,000 miles up to about 125,000 miles, at various speeds and conditions.

   Recall 23V858000Recall 23V751000Recall 21V2150001 related service bulletin

   What to check: Ask whether the fuel pump and engine bearing recalls have been completed and whether the vehicle has shown any stalling or limp-mode events. Request service records for any warning-light or no-start diagnoses.

   2 excerpts from owner complaints in NHTSA records

   “Vehicle goes into 'go limp' when I accelerate or change lanes. Very dangerous situation when passing on a two lane country road (happened twice) and merging onto a highway with a short entrance ramp. This could potentially lead to a major accident and we don't feel comfortable driving this vehicle in these situations.”

   NHTSA complaint #11361064, filed 2020-09, 23,040 miles

   “While driving approx. 40 MPH and slowing to turn into gas station, the car completely turned off. I was unable to put car in neutral or get off of road. Tow truck called and had to be drug onto flatbed. Garage replaced battery and still unable to start. Needed to replace timing belt, tensioner pulley, water pump, engine short block and heads. Car with only 4088 miles, no s/s of issue prior to incident, etc. Garage not sure what caused issue, best guess is manufacture defect in timing belt. …”

   NHTSA complaint #11182028, filed 2019-02, 4,088 miles
2. 2
   Forward collision avoidance

   Forward collision system brakes unexpectedly

   • 15 complaints (8%)
   • median 12,000 mi at 1.3 yrs old (6 state mileage, few)
   • 2 mention a crash, fire or injury
   • filed 2019–2026

   Owners describe the automatic emergency braking engaging with no obstacle in front, sometimes bringing the vehicle to a sudden stop and in one case contributing to a collision. Several say the system also beeped or pulsed the brakes while cornering. Complaints note dealers were often unable to replicate the issue and sometimes described it as normal operation. Reported from about 2,000 miles to roughly 45,000 miles, at various speeds including highway and cruise-control use.

   What to check: During a test drive, note whether the collision-mitigation warning or braking activates without a clear obstacle. Ask whether the dealer has inspected or recalibrated the forward camera and radar.

   2 excerpts from owner complaints in NHTSA records

   “The vehicle is equipped with safety features which are designed to alert you if braking is required and to brake to avoid a collision the vehicle also has active cruise control which is designed to slow your vehicle when a vehicle enters your lane with in a pre set distance. Cruise control: while driving on the freeway using active cruise control my vehicle slowed down from 70 to 45 no vehicles entered my lane I was passed on my left by a vehicle doing 80 plus. This happened twice with in twenty minutes. …”

   NHTSA complaint #11318129, filed 2020-03, 6,000 miles

   “The automatic collision mitigation system had a complete 100% lock up of my brakes during a cross of an intersection . Although I was wearing my seatbelt the force of the stop threw my head into the steering wheel. It is a complete miracle that the car behind me did not rear-end me. This system routinely gives false positives when going around corners when you are in the center lane and it beeps and pulses the brakes. This time, the car stopped completely and I hit my head and was lucky to not cause an accident. …”

   NHTSA complaint #11292242, filed 2019-12, 18,000 miles
3. 3
   Transmission and drivetrain

   Transmission jerking, harsh shifting or failure

   • 20 complaints (10%)
   • median 64,611 mi at 6.0 yrs old (8 state mileage, few)
   • 1 mention a crash, fire or injury
   • filed 2020–2026

   Complaints describe harsh or slamming shifts, jerking during acceleration, and in some cases the transmission failing and needing replacement. Several owners report the dealer could not duplicate the problem or attributed it to fluid, while others say the vehicle lost acceleration or shifted to park while driving. Reported from about 10,000 miles up to roughly 75,000 miles, at various speeds.

   What to check: Test-drive at low and highway speeds and note any harsh shifts or hesitation. Ask for transmission service records and whether fluid changes were done.

   2 excerpts from owner complaints in NHTSA records

   “My 2019 Acura MDX which was owned for less than two years, broke down due to a transmission failure. The vehicle had an open recall (one of many recent) delayed by Acura for months, which research shows can cause engine and transmission damage. Acura of Reno denied the recall link and misattributed the failure to “incorrect fluid,” despite admitting the fluid was correct to myself and other businesses. I believe this breakdown was directly related to the open recall and request an investigation into Acura’s handling of these failures. …”

   NHTSA complaint #11682975, filed 2025-08

   “Transmission is constantly slamming into 4th gear and has been to the dealership 3 times. Corporate has even evaluated in and has deemed it to be within specification . The transmission is going to break down while driving and pose a safety hazard. It feels as if the mounts are going to break off when it does it.”

   NHTSA complaint #11306157, filed 2020-01, 10,000 miles
4. 4
   Fuel system

   Fuel gauge or fuel pump problems

   • 34 complaints (18%)
   • median 60,000 mi at 5.4 yrs old (8 state mileage, few)
   • filed 2021–2026

   Owners describe the fuel gauge fluctuating or reading incorrectly after refueling, and some report stalling attributed to the fuel pump. Several complaints reference the fuel pump recall and note that the failure recurred after the recall repair or that parts were not yet available. Reported from about 44,000 miles up to roughly 90,000 miles, often after refueling or at stops.

   Recall 23V858000Recall 21V2150001 related service bulletin

   What to check: Confirm the fuel pump recall was completed and ask whether the fuel gauge has shown erratic readings. Check for fuel odor around the vehicle after refueling.

   2 excerpts from owner complaints in NHTSA records

   “The contact owns a 2019 Acura MDX. The contact referenced NHTSA Campaign Number: 21V215000 (Fuel System, Gasoline). The contact stated that after refueling the vehicle and driving several miles, the fuel gauge fluctuated to empty. The contact stated that the fuel gauge would indicate the incorrect amount of the fuel in t fuel tank. No warning light was illuminated. The vehicle was taken to the dealer where the failure could not be duplicated. …”

   NHTSA complaint #11482489, filed 2022-09, 44,000 miles

   “The contact owns a 2019 Acura MDX. The contact received notification of NHTSA Campaign Number: 23V858000 (Fuel System, Gasoline); however, the part to do the recall repair was not yet available. The contact stated while attempting to drive from a complete stop at a traffic light, the vehicle stalled, nearly causing a crash. Several unknown warning lights were illuminated. The local dealer was contacted. The vehicle was not diagnosed or repaired. …”

   NHTSA complaint #11625945, filed 2024-11, 90,000 miles
5. 5
   Engine

   Idle-stop fails to restart the engine

   • 17 complaints (9%)
   • median 17,250 mi at 2.8 yrs old (4 state mileage, few)
   • 1 mention a crash, fire or injury
   • filed 2019–2026

   Complaints describe the engine shutting off at a stop with the idle-stop feature active and then failing to restart when the brake is released. Owners report the vehicle becoming immobile at intersections or lights, sometimes jumping into neutral and requiring the ignition to be cycled or several minutes before it restarts. Some mention the dealer could not determine the cause. Mostly reported under about 5,000 miles, typically at stops in traffic or at lights.

   5 related service bulletins

   What to check: Ask whether the PGM-FI software update described in the service bulletins has been applied, and test the idle-stop function at a stop during a test drive.

   2 excerpts from owner complaints in NHTSA records

   “The engine auto stop or idle stop is a safety hazard. The engine shuts off preventing a quick acceleration from an intersection or other hazard. The manufacture should offer a method to permanently disable this hazard.I was nearly t-boned when trying to make a lh turn at a busy intersection because the car had to start before accelerating”

   NHTSA complaint #11234618, filed 2019-07, 2,500 miles

   “When stopped at a light or in traffic the vehicle engages the auto idle feature. (turns off the engine to save gas). Upon releasing the brake, the car should re-start, instead the car does not start. The car jumps out of the drive gear into neutral on the transmission. The electrical system goes crazy and does not allow you to either turn off the car's electrical system or re-restart the car using the car's on/off button. This has happened to me at least 5-10 times over the last year. …”

   NHTSA complaint #11492321, filed 2022-11

Buying note. Check that the open recalls for the fuel pump, engine bearing, timing belt, tailgate lighting and rear brake caliper have been completed on this specific vehicle, and confirm any software updates for the idle-stop and collision systems. A test drive at both low and highway speeds can help reveal stalling, transmission or unexpected braking behavior.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.