2020 Acura MDX problems & reliability
210 owner complaints filed with NHTSA for the 2020 Acura MDX, alongside 8 safety recall campaigns. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
1 complaint report injuries (2 injured).
Federal crash records (FARS 2020–2023): 2020 Acura MDX vehicles were involved in 13 fatal crashes with 4 occupant deaths. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Engine | 77 | 37% |
| Unknown OR Other | 38 | 18% |
| Electrical System | 37 | 18% |
| Forward Collision Avoidance | 35 | 17% |
| Power Train | 20 | 10% |
| Engine and Engine Cooling | 16 | 8% |
| Lane Departure | 16 | 8% |
| Fuel/propulsion System | 15 | 7% |
| Service Brakes | 14 | 7% |
| Vehicle Speed Control | 13 | 6% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 36,000 miles (middle 50% between 19,725 and 55,000 miles), based on 33 complaints that included mileage.
Complaints by incident year
What owners report
“A federal safety recall was performed on the vehicle to install a rear subframe reinforcement kit. Before the recall repair, the vehicle operated normally and had no vibration at highway speeds. Immediately after the recall repair, a new vibration developed above approximately 60 mph. The vibration is felt primarily…”
Suspension · filed Jul 14, 2026
“The car had several warnings lights come on and immediately stalled out and stoped right in the middle of the road. The engine would turn over but would sputter like it was out of gas and would die after a few seconds. It stoped in the middle of a busy state highway in a curve. Luckily no one got hurt. I towed it to…”
Fuel/propulsion System · filed Jul 8, 2026
“The contact owns a 2020 Acura MDX. The contact stated that while driving approximately 20 - 25 MPH, there was an abnormal knocking sound coming from the passenger’s side of the vehicle. The contact stated that the check engine warning light and other unknown warning lights were illuminated. The vehicle stalled and was…”
Engine and Engine Cooling · filed Jun 26, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- Engine failure
Preliminary Evaluation PE25008 · opened Aug 20, 2025 · open
- No Restart After Auto Start/Stop Engages
Engineering Analysis EA25004 · opened Mar 26, 2025 · open
- Engine failure
Recall Query RQ24013 · opened Nov 8, 2024 · closed Aug 20, 2025
Technical service bulletins
110 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2020 Acura MDX. The 10 most recent:
Owner Notification Letter - Under certain circumstances, after coming to a stop and the idle stop feature engaging, the vehicle may not automatically restart. Acura is providing a product update with a new PGM-FI…
ONL6AX01302026 · Other · issued Jan 31, 2026
Dealer Message - Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart. Typically, the client can immediately restart the vehicle by selecting…
BEBM12032025901 · Other · issued Dec 3, 2025
Service Bulletin - Under 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. Typically, the…
B23-002 · Service Bulletin/Repair Instructions · issued Jul 7, 2025
Service Bulletin - The 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.
B24-022 · Service Bulletin/Repair Instructions · issued Feb 19, 2025
Service Bulletin - The AWD warning light is on potentially due to water intrusion into the rear differential pump motor connector area that corrodes the terminals.
B24-022 · Service Bulletin/Repair Instructions · issued Nov 22, 2024
Service Bulletin - Client complaint of A/C not blowing cold air due to oil/refrigerant leak from the A/C compressor shaft seal.
B23-024 · Service Bulletin/Repair Instructions · issued Jun 19, 2024
Owner Notification Letter - Under certain circumstances, after coming to a stop and the idle stop feature engaging, the vehicle may not automatically restart. Acura is providing a product update with a new PGM-FI…
ONL6AX05292024 · Other · issued May 29, 2024
Service 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 are now included in…
B24040A · Other · issued May 1, 2024
Service Bulletin - Customers have complained that the air conditioning system is not blowing cold air due to Oil/Refrigerant leaking from the A/C compressor shaft seal.
B23-024 · Service Bulletin/Repair Instructions · issued Jan 24, 2024
Service Bulletin - The MIL comes on during vehicle operation due to variations in the purge control solenoid valve spring, the valve wears unevenly and intermittently sticks. This may result in setting DTC P0441…
B23-035 · Service Bulletin/Repair Instructions · issued Jan 10, 2024
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 2020 Acura MDX has 8 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2020 Acura MDX?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 36,000 miles — budget accordingly if the car is approaching that mileage.