*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Seat belts
The contact owns a 2021 Acura RDX. The contact stated that the front passengerâs side seat belt retractor failed to retract as needed. The vehicle was taken to a dealer and was inspected and repaired. The failure mileage was 42,000
May 1, 2026 · 42,000 milesVisibility/wiper
Rear window shattered spontaneously twice. 9/12/24 & 10/11/26
Oct 11, 2026Engine
2021 Acura RDX has cold start, uses coolant and will stumble, limp mode approaching 2000 RPM. Vehicle will flash check engine light and then will go away when vehicle is restarted. Using search criteria noted TSB issued for same make model and year with an extended warranty being offered through TSB, 10 year 150,000 miles. Vehicle has 103,000 miles. Dealer is stating no TSB for this VIN, however the number one issue noted through internet searches and this database.
Sep 21, 2026Unknown or other
Acura Sunnyside in New Hampshire denied to repair my recall on my 2021 Acura RDX.
Oct 1, 2026Engine
Engine was replaced 12/13/25 due to cracked cylinder head causing oil to leak into exhaust and fill cylinder 2 and 3. 09/21/26 new engine replacement done in December 25, has now blown cylinder head gasket seal in under 12,000 Miles. Causing coolant to leak into cylinders 2 and 3.
Sep 20, 2026Engine
Head Gasket blown known problem with Honda and Acura 2.0T I didnât know of this issue until it occurred to Loi Me in 2025 My Acura dealership told me itâs a huge problem with the Acura RDXand it should be a warranty extension similar to the warranty extension for other Honda products done in August 27, 2026 I was lucky and my head gasket didnât blow while I was driving Iâm also concerned that itâs gonna happen again Iâm not sure if the problem was resolved with the new head gasket or itâs a stomach problem with the motor that has not been addressed yet
Sep 1, 2025Service brakesCrash
Two low-speed sudden unintended acceleration events while parking a 2021 Acura RDX. Incident 1 (July 2026): While parking at low speed, the car unexpectedly surged forward. Flew up the curb and hit a restaurant window, causing massive undercarriage damage. Active braking did not help and seemed to make acceleration worse. It only stopped when it wanted to. Incident 2 (August 2026): Two weeks after getting the car back from repairs, under identical low-speed parking conditions, a second sudden acceleration event occurred. Slamming on the brakes did nothing. It stopped after scraping a car wash vacuum pole, destroying the entire passenger side. Prior to these, the car exhibited erratic safety…
Aug 19, 2026Fuel/propulsion system
Fuel Pump is having to be replaced. I have had issues accelerating and my car also stalled once on the freeway. It put me in a dangerous situation and I almost got in an accident because my speed quickly decreased. The same part was recalled on the previous yearâs model.
Jul 6, 2026
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.
