*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Engine
On October 1, 2026 at approximately 5:45am, while driving my 2026 Acura MDX, I stopped at a red traffic light on a busy street. The vehicle's Auto Idle Stop system shut the engine off as designed. When the light turned green and I attempted to proceed, the engine failed to restart. The vehicle became disabled in an active traffic lane in the dark and I was unable to move it for several minutes. I attempted to restart the vehicle multiple times. It took several attempts to fully the shut the vehicle down and restart it before I was able to actually restart the car and resume driving. Because the vehicle was unexpectedly immobilized in traffic when surrounding vehicles began moving, I was…
Oct 1, 2026Visibility › Rearview mirrors/devices › Interior
The contact owns a 2026 Acura MDX. The contact stated that while driving 30 MPH and adjusting the interior rearview mirror, the mirror detached and was hanging down. The vehicle was taken to the dealer, where it was determined that the windshield and the interior rear-view mirror needed to be replaced. The contact declined to pay for the repair because the vehicle was brand new. The dealer repaired the rear-view mirror without replacing the windshield; however, the failure recurred approximately 8 months later. The dealer was notified by phone and informed the contact that there was no available appointment to repair the vehicle. The contact believed the failure was a factory defect. The…
Jan 2, 2026 · 1,800 milesLane departure › Blind spot detection
Blind spot warning system stops working when the it is hot outside or inside of the vehicle
Dec 15, 2025Lane departure › Blind spot detection
I am writing to formally escalate an unresolved matter regarding my 2026 Acura MDX Technology, purchased on XXX, from Piazza Acura of [XXX]. As a loyal Acura customer of over nine years and currently on my fourth lease, this experience is both unexpected and unacceptable. Since shortly after purchase, the vehicle has exhibited persistent and unresolved performance issues, most notably harsh and inconsistent gear shifting and a pronounced vibration in the accelerator pedal. Despite multiple service visits and significant time invested, these concerns remain unresolved. I have repeatedly been advised that these conditions are ânormal characteristicsâ of the vehicle due to adaptive…
Apr 9, 2026Electrical system › Adas › Blindspot › Sensors
The blind spot monitor becomes inoperable when you leave the car in an open area with sun and warm weather on the car. If you take the car and place it in a garage or during nighttime the monitors will come back on. This problem was brought to the dealer, Gettel Acura, [XXX] in XXX. They replaced a Chip and told me it was fixed. It has not been fixed and the inoperable monitor makes it dangerous, especially on the interstate highway. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Apr 20, 2026Electrical system
Google on-board gives a persistent error that the MMI and car driving technology firmware cannot be completed. Service center says itâs known and they canât do anything. The car is supposed to have voice control over vehicle temperature and functionality â it does not. It frequently will not automatically connect to a wireless Apple Car Play or Google Auto connection. Firmware is also supposed to communicate w car speed, etc. to make Acura Assist driving more safe.
Nov 15, 2025Vehicle speed control
2026 Acura MDX with Acura Factory A Spec issued plastic floor mats. Accelerator pedal gets stuck behind the floor mat resulting in uncontrolled wide open throttle. Had to physically put my foot behind the pedal and pull pedal away from floor. Afterwards tried a few times to repeat the issue, 3/5 times was able to reproduce stuck pedal. Top of the drivers plastic floor mats, right side, has a U cut out for the accelerator pedal. This needs to be trimmed another 1/2â or more to stop the issue. Could result in severe or fatal consequences.
Nov 10, 2025Engine
2026 Acura MDX with 3.5 L V6 (J35Y-series) experienced connecting-rod bearing failure and total engine loss at 1,920 miles. Vehicle currently at dealer. Appears identical to failures under NHTSA PE25-008 (2016-2020 models)
Oct 21, 2025
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.
