2021 Acura RDX: True Cost, Problems & Verdict
111 NHTSA owner complaints · 3 recalls · data-computed verdict. No opinions — public data only.
Editor's note
Avoid the 2019 and 2020 RDX, which score 32 each on 433 and 344 complaints, and the 2015 at 39 on 409, with the 2014 (50) and 2021 (51) as CAUTION years to walk past. Buy a 2016 to 2018, which score 89, 88 and 84 on 40, 75 and 77 complaints, or a 2022 to 2024 at 83 to 84 on 31, 21 and 11. Read the full note on the model page. 2021 specifically: this is one of the years the note above says to approach with care — 111 complaints on record, verdict CAUTION.
Read the guide
Used Acura MDX, RDX and TLX: the years to avoid, including 2021 — written and signed by Adir Trabelsi, 2026-09-16.
Owner complaints: 111 filed with NHTSA
Complaints per year on the road: 22.2
What owners say
Verbatim reports filed with the United States safety regulator (NHTSA) by owners of this exact model year. Public record.
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 year’s model.
While driving only at 35 miles per hour down the XXX in [XXX] my panoramic sunroof suddenly bursts. A loud pop sound. This would have popped all over my body if I didn’t have cover up. This is an extreme problem as someone can die from this. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Vehicle lost all coolant and could be smelled. Vehicle was towed to dealership before it could overheat. Diagnosed with a cracked cylinder head at 88,000 miles. Vehicle has never been modified, tracked, nor has it ever overheated. All service has been performed on time and at Acura dealership since I purchased the vehicle brand new. Vehicle is still at dealership. I've researched and found many other owners experienc…
Recalls: 3 campaigns (2 severe)
| Campaign | Component | Summary |
|---|---|---|
| 24V064000 | 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… |
| 21V939000 | Power Train:Driveline:Driveshaft | Honda (American Honda Motor Co.) is recalling certain 2021 Acura RDX and 2022 CR-V Hybrid vehicles. A component in the right or left front driveshaft may have been improperly heat-treated, which could result in driveshaft failure. |
| 26V332000 | 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… |
What it costs to buy — and what owning it really takes
Class-level estimates, priced as a mid-size premium car of its model year, re-priced to your country. Not a quote, not a valuation of one specific car — condition, mileage and options move it. How these are computed.
What it costs to run
EPA combined 23 MPG · estimated annual fuel cost $3,300
Re-priced automatically from your country's retail fuel, electricity and parts indices — change country in the bar at the top. Estimates; see methodology.
What this car's problems cost to fix
Ranked by the components owners of this exact model year actually complain about. Each figure is flat-rate labour hours x the local shop rate plus a parts band — an estimate of what this kind of failure costs, not a quote, and not a prediction that this car will need it. Formula.
- Unknown Or Other30 complaints · typical job: Diagnosis and mixed repair (2.0 h labour + parts)$360–$940
- Engine20 complaints · typical job: Cooling-system or timing-drive repair (6.0 h labour + parts)$1,040–$2,220
- Service Brakes16 complaints · typical job: Pads, rotors and caliper service, both axles (3.0 h labour + parts)$580–$1,140
- Power Train13 complaints · typical job: Transmission service or clutch-pack repair (7.0 h labour + parts)$1,290–$4,040
- Air Bags11 complaints · typical job: Airbag module, clockspring or sensor replacement (2.5 h labour + parts)$600–$1,700
- Electrical System10 complaints · typical job: Alternator, battery-drain or body-module diagnosis and replacement (3.0 h labour + parts)$540–$1,310
Other Acura RDX years
FAQ
What is the most common problem with the 2021 Acura RDX?
The most-reported issue in NHTSA complaint data is Unknown Or Other (30 complaints in our indexed sample).
Is the 2021 Acura RDX a good used car to buy?
Our data verdict is CAUTION with a reliability score of 51/100, computed from 111 NHTSA complaints and 3 recall campaigns. See the verdict card for the top reasons.
How much does it cost to fix the 2021 Acura RDX's most common problem?
30 of the NHTSA complaints filed against the 2021 Acura RDX sit in the Unknown Or Other group — more than any other component on this model year. The representative job there is diagnosis and mixed repair: about 2.0 hours of labour plus parts, roughly $360–$940 at a US independent shop and re-priced to your country at the top of the page. It is an estimate of what this class of failure costs, not a quote for this car.
What does a 2021 Acura RDX cost to run per year?
About $5,091 a year in fuel or energy plus the maintenance band — roughly $25,458 over five years, before purchase price, insurance and depreciation. Figures come from available EPA fuel-economy data and industry maintenance averages, and are re-priced to your country.
Does the 2021 Acura RDX have recalls?
Yes — NHTSA lists 3 recall campaign(s) for the 2021 Acura RDX, 2 of them touching fire, crash or stall risk, the most recent recorded 01/02/2024. Check this car's VIN at nhtsa.gov/recalls before you buy.
Compare with
Other luxury midsizes of about the same age.
What will a 2021 Acura RDX really cost YOU per year?
Fuel, maintenance band and depreciation — computed from public data in 10 seconds.
Open the true-cost calculatorData sources
Complaints & recalls: NHTSA ·
Fuel economy: EPA fueleconomy.gov ·
Scoring: our published methodology.
Maintenance bands are industry-average estimates (AAA Your Driving Costs, CarMD index) — labeled estimates, not measurements.
Last updated: 2026-10-04.
Moderate evidence — 111 complaints, 3 recalls on record
- 111 NHTSA complaints on record (22.2/yr of exposure) — worse than a typical year of this model (9.6/yr)
- 3 recall campaigns, 2 touching safety-critical systems