2018 Acura MDX problems & reliability
161 owner complaints filed with NHTSA for the 2018 Acura MDX, alongside 10 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.
2 complaints report injuries (3 injured).
Federal crash records (FARS 2020–2023): 2018 Acura MDX vehicles were involved in 11 fatal crashes with 3 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 | 35 | 22% |
| Fuel/propulsion System | 28 | 17% |
| Electrical System | 27 | 17% |
| Power Train | 23 | 14% |
| Fuel System, Gasoline | 22 | 14% |
| Forward Collision Avoidance | 20 | 12% |
| Unknown OR Other | 19 | 12% |
| Engine and Engine Cooling | 18 | 11% |
| Lane Departure | 15 | 9% |
| Vehicle Speed Control | 14 | 9% |
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 30,000 miles (middle 50% between 12,000 and 50,000 miles), based on 37 complaints that included mileage.
Complaints by incident year
What owners report
“I am writing to report an urgent safety concern regarding my 2018 Acura MDX Tech SH-AWD. Upon starting the vehicle, all primary AcuraWatch driver-assist systems suffered a total failure. The center display continuously cycles through four warnings: Collision Mitigation System Problem Adaptive Cruise Control Problem…”
Forward Collision Avoidance · filed Jul 24, 2026
“SUPPLEMENTAL — REFERENCE ODI 11742372 Follow-up to ODI 11742372, 2018 Acura MDX, VIN 5J8YD3H33JL******. Intermittent multipurpose camera failure, DTC U3000-49, causing simultaneous loss of CMBS, ACC, LKAS, and RDM. The defect remains unresolved and I have been unable to obtain diagnosis or repair through Acura's…”
Forward Collision Avoidance · filed Jul 21, 2026
“Transmission failed and light appeared. Speed reduced from 30 to 15. Acura stated they had to reset computer system and claimed when they started the car no lights shown and was able to reverse car. I was unable to reverse car, struggled and tugged feeling in the car. This is the 2nd time and they always repeat same…”
Electrical System · filed Jul 10, 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
139 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2018 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
Service Bulletin - An uneven sealing surface allows moisture to enter the inner taillight(s), causing one or both of the inner taillights not to work.
B25-003 · Service Bulletin/Repair Instructions · issued Sep 4, 2025
Service Bulletin - An uneven sealing surface allows moisture to enter the inner taillight(s), causing one or both of the inner taillights not to work.
B25-003 · Service Bulletin/Repair Instructions · issued Jul 9, 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
Owner Notification Letter - An uneven sealing surface allows moisture to enter the inner taillight(s), causing one or both of the inner taillights not to work.
ONL6L806042025 Form · Other · issued Jun 5, 2025
Owner Notification Letter - An uneven sealing surface allows moisture to enter the inner taillight(s), causing one or both of the inner taillights not to work.
ONL6L806042025 Letter · Other · issued Jun 5, 2025
Service Bulletin - An uneven sealing surface allows moisture to enter the inner taillight(s), causing one or both of the inner taillights not to work.
B25-003 · Service Bulletin/Repair Instructions · issued Apr 18, 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
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
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 2018 Acura MDX has 10 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 2018 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 30,000 miles — budget accordingly if the car is approaching that mileage.