UsedScore

2020 Acura MDX: Avoid

Owners filed 91 complaints with NHTSA about the 2020 Acura MDX in its first five years on the road, about 186 for every 100,000 sold: 2.1× the rate of a typical MDX year. That's more than twice a typical year, across more than one problem area.

The biggest problem area, counting serious complaints more, is the engine (42% of complaints, median 34,000 miles).

Complaint index
2.1×
per vehicle sold, vs. a typical MDX year
Rank
11th of 13
1st = fewest complaints
Complaints
91
first five years; 186 per 100,000 sold
Recalls
8
campaigns
3rd generation, 2014–2020 · Updated September 24, 2026 · How we rate
2017–2020 Acura MDX (facelift)

Photo: 2017–2020 Acura MDX (facelift) · Kevauto, CC BY-SA 4.0, via Wikimedia Commons

Problem areas

Ranked by severity-weighted complaints · share · median miles
  1. Engine42% · 38 complaints · median 34,000 miles
  2. Electrical19% · 17 complaints
  3. Fuel and propulsion18% · 16 complaints · median 23,000 miles
  4. Powertrain12% · 11 complaints
  5. Speed control9% · 8 complaints
  6. Brakes7% · 6 complaints
  7. Driver assistance7% · 6 complaints
  8. Air bags2% · 2 complaints
  9. Seats and belts1% · 1 complaints
  10. Visibility3% · 3 complaints

Bars rank problem areas by complaints weighted for severity (crashes, fires, injuries and deaths count more). A complaint can name more than one area. Mileage is reported on about half of complaints.

What owners describe

Electrical

Owners of this MDX describe the auto idle-stop feature shutting the engine off at stoplights and sometimes not restarting right away, occasionally shifting into neutral. Dealers have tried batteries, starters, and software updates, but many say the stalling kept happening.

Warning signs:
Many report dash warning lights (battery, check engine, electric parking brake), flashing indicators, a hard brake pedal, or a blank/flashing display before or during the stall.
What shops did:
Dealers have replaced batteries, starters, or alternators and performed software updates, though several owners say the shop could not duplicate or fully resolve the issue.
Mileage:
most between 20,000 and 45,000 miles, among 9 complaints that give it

“The car shut off and switched into neutral with check engines lights on the dash.”

“the vehicle went into N (neutral) and the engine did not restart”

Engine

Owners of this MDX describe the engine unexpectedly stalling, especially when the Auto Idle Stop feature is active, sometimes shifting into neutral at stops. Others report knocking sounds that led to rod bearing failure and a need for engine replacement, with some repairs delayed by recall part shortages.

Warning signs:
Many mention warning lights, knocking or ticking sounds from the engine, hesitation, or loss of power before the vehicle stalled or lost motion.
What shops did:
Dealers replaced batteries, performed software updates, or could not replicate the problem; some engines were replaced under warranty while others say repairs or recall parts were unavailable.
Mileage:
most between 35,000 and 65,000 miles, among 20 complaints that give it

“You are sitting at a light or stop sign, go to hit the gas, and the car is in neutral.”

“it had been a connecting rod bearing failure and needed an entire new engine”

Fuel and propulsion

Owners describe their 2020 MDX stalling, losing power, or shifting into neutral unexpectedly, often linked to the auto idle stop/start feature or fuel pump. Many say dealers couldn't reproduce the issue or were waiting on backordered recall parts, leaving the problem unresolved for months.

Warning signs:
Some report dashboard warning lights, a hesitation or rough restart, sputtering, or a
What shops did:
Many report dealers could not diagnose, replicate, or repair the problem, or were waiting on recall parts that were unavailable for months.
Mileage:
most between 15,000 and 45,000 miles, among 7 complaints that give it

“the car will then shift to neutral by itself instead of restarting to drive”

“The only way to get out of it is to turn it off and back on”

Summaries are written with AI from the owner complaints shown on NHTSA's site and checked against them; quotes are word for word.

Recalls (8)

Check a VIN on NHTSA ›
  • NHTSA 26V365000June 2026880,514 vehicles

    Suspension: rear · Structure: frame and members

    American Honda Motor Company (Honda) is recalling certain 2016-2022 Honda Pilot, 2017-2023 Ridgeline, 2019-2023 Passport, and 2014-2020 Acura MDX vehicles that were sold in Connecticut, Delaware, District of Columbia, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, Virginia, West Virginia, or Wisconsin. The rear subframe may corrode at the suspension mounting points, which can result in rear suspension component failure.

    Risk: Failure of rear suspension components, such as the rear control arm, can cause a loss of vehicle handling and control, increasing the risk of a crash or injury.

    Fix: Dealers will inspect the rear subframe and install a rear subframe reinforcement kit and, as necessary, repair or replace the rear subframe components, free of charge.

  • NHTSA 26V332000May 202698,892 vehicles

    Air bags: sensor: occupant classification: front passenger

    Honda (American Honda Motor Co.) is recalling certain 2018-2021, 2023 Acura TLX, 2019-2024 RDX, 2017-2020, 2022-2026 MDX, 2017-2021, 2023, 2025 Honda Ridgeline, 2017-2022 Pilot, 2019-2021 Passport, 2018-2026 Odyssey, 2019-2022 Insight, 2019-2021 HR-V, 2018-2020 Fit, 2020-2022 CR-V Hybrid, 2017-2022 CR-V, 2017-2018, 2021 Civic Type R, 2017-2021 Civic hatchback, 2016-2020 Civic coupe, 2016-2022 Civic, 2017-2022 Accord Hybrid, and 2016-2022 Accord vehicles. The front passenger seat weight sensor may crack and short circuit, which can cause the air bags to deploy unintentionally during a crash.

    Risk: Air bags that deploy unintentionally during a crash increase the risk of injury.

    Fix: Dealers will replace the seat weight sensors, free of charge.

  • NHTSA 25V259000April 2025152,800 vehicles

    Interior lighting · Exterior lighting

    Honda (American Honda Motor Co.) is recalling certain 2014-2020 Acura MDX vehicles. Moisture may enter the tailgate lid light assembly and wiring harness, which can cause the interior and exterior lights to fail, including the lid lights, position lights, license plate lights and taillights.

    Risk: Vehicle lights that fail to illuminate can decrease visibility and increase the risk of a crash.

    Fix: Dealers will inspect the wiring and install a fuse harness, replace the lid light, and repair the body dust sealer, as necessary, free of charge.

  • NHTSA 24V064000February 2024750,114 vehicles

    Air bags: sensor: occupant classification: front passenger

    Honda (American Honda Motor Co.) is recalling certain 2020-2022 Pilot, Accord, Civic sedan, HR-V, Odyssey, 2020 Civic coupe, Fit, 2021-2022 Civic hatchback, 2021 Civic Type R, Insight, 2020-2021 CR-V, CR-V Hybrid, Passport, Ridgeline, Accord Hybrid, 2020 Acura MDX, 2022 Acura MDX, 2020-2022 Acura RDX, and 2020-2021 Acura TLX vehicles. The front passenger seat weight sensor may crack and short circuit, failing to suppress the air bag as intended.

    Risk: An air bag that deploys unintentionally during a crash can increase the risk of injury.

    Fix: Dealers will replace the seat weight sensors, free of charge.

  • NHTSA 23V858000December 20232,490,460 vehicles

    Fuel system, gasoline: delivery: fuel pump

    Honda (American Honda Motor Co.) is recalling certain 2013-2023 Honda Accord, Civic Coupe, Civic Sedan, Civic Hatchback, Civic Type R, CR-V, HR-V, Ridgeline, Odyssey, Acura ILX, MDX, MDX Hybrid, RDX, RLX, TLX, 2019-2022 Honda Insight, Passport, 2020 Honda CR-V Hybrid, 2018-2019 Honda Clarity PHEV, Fit, and 2015-2020 Honda Accord Hybrid, Pilot, Acura NSX vehicles. The fuel pump inside the fuel tank may fail.

    Risk: Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.

    Fix: Dealers will replace the fuel pump module, free of charge.

  • NHTSA 23V751000November 2023248,999 vehicles

    Engine and engine cooling: engine: hard parts internal/mechanical

    Honda (American Honda Motor Co.) is recalling certain 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2016 and 2018-2019 Pilot, 2017 and 2019 Ridgeline, and 2018-2019 Odyssey vehicles. Due to a manufacturing error, the connecting rod bearing in the engine may wear and seize, damaging the engine.

    Risk: A damaged engine may run improperly or stall while driving, increasing the risk of a fire, crash, or injury.

    Fix: Dealers will inspect and repair, or replace the engine as necessary, free of charge.

  • NHTSA 23V458000June 2023124,077 vehicles

    Service brakes, hydraulic: foundation components: master cylinder

    Honda (American Honda Motor Co.) is recalling certain 2020-2021 Civic, 2020-2023 Ridgeline, 2021-2023 Passport, 2021-2022 Pilot, and 2020 Acura MDX vehicles. The tie rod fastener that connects the brake booster and the brake master cylinder may have been improperly assembled during manufacturing, which can cause the brake master cylinder to separate from the booster assembly.

    Risk: Brake master cylinder separation can cause a loss of brake function and increase the risk of a crash.

    Fix: Dealers will inspect and repair the brake booster assembly as necessary, free of charge.

  • NHTSA 21V215000March 2021624,552 vehicles

    Fuel system, gasoline: delivery: fuel pump

    Honda (American Honda Motor Co.) is recalling certain 2019-2020 Acura MDX, MDX Sport Hybrid, RDX, TLX, Honda Accord, Civic Hatchback, Insight, 2019 Acura ILX, Honda Accord Hybrid, Civic Coupe, Civic Coupe Si, Civic Sedan, Civic Sedan Si, Civic Type R, Fit, HR-V, Odyssey, Passport, Pilot and Ridgeline, and 2018-2019 CR-V vehicles. The low-pressure fuel pump inside the fuel tank may fail.

    Risk: Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.

    Fix: Honda will notify owners, and dealers will replace the fuel pump assembly, free of charge.

A recall only helps if the repair was done. Enter the vehicle's 17-character VIN on NHTSA's official recall lookup before you buy.

Service bulletins

Acura sent NHTSA 114 service bulletins and other notices to dealers covering the 2020 MDX. These are repair instructions, not recalls. Warranty extensions and bulletins about its top problem areas:

  • ONL6T603102023 · March 2023 · Warranty extensionWarranty Extension reimbursement form for engine idle stop repairs made before the warranty extension notice date.
  • ONL6T603102023-3 · March 2023 · Warranty extensionUnder certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart.
  • ONL6AX01302026 · January 2026Owner Notification Letter - Under certain circumstances, after coming to a stop and the idle stop feature engaging, the vehicle may not automatically restart.
  • BEBM12032025901 · December 2025Dealer Message - Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart.
  • B23-002 · July 2025Under certain circumstances, after coming to a stop and engaging idle stop the vehicle may not restart automatically due to excessive cylinder pressure and/or low cranking torque.
  • B24-022 · February 2025The AWD warning light is on with one or more AWD DTCs having been set due to water intrusion into the electric oil pump motor connector area corrodes the terminals.
  • ONL6AX05292024 · May 2024Owner Notification Letter - Under certain circumstances, after coming to a stop and the idle stop feature engaging, the vehicle may not automatically restart.
  • B24040A · May 2024Service News - Due to On-Board Diagnostic (OBD) regulation change starting with 2019 vehicles, American Honda’s Variable Valve Timing and Lift Electronic Control (VTEC) On-Board Diagnostic monitors…

All 2020 MDX bulletins on NHTSA ›

Questions owners ask

Is the 2020 Acura MDX reliable?
Owners filed 91 complaints with NHTSA about the 2020 Acura MDX in its first five years on the road, about 186 for every 100,000 sold: 2.1× the rate of a typical MDX year. That's more than twice a typical year, across more than one problem area. Ratings compare MDX years with each other using complaints filed with NHTSA; they don't measure every problem owners have.
What are the most common 2020 MDX problems?
Owners' complaints most often involve the engine (42%), the electrical system (19%) and the fuel or propulsion system (18%). A complaint can name more than one area.
Has the 2020 Acura MDX been recalled?
Yes. NHTSA lists 8 recall campaigns for the 2020 Acura MDX, the most recent in June 2026 (suspension). Enter the vehicle's VIN on NHTSA's recall lookup to see whether the repairs were done.

Sources

Owner complaints, recalls and manufacturer communications from NHTSA's public data files, as of September 24, 2026. Complaints are counted once each, over the model year's first 60 months on the road. UsedScore is not affiliated with NHTSA or Acura. The 2020 Acura MDX on NHTSA.gov · How we rate