2021 Acura RDX used buying checklist

Test for the problems owners report most

The most reported problems of this model year, with what to look for on the test drive.

• Check engine light12 owner complaints

  Start the engine cold and listen for knocking or ticking. Check for warning lights, oil leaks and a low oil level, and ask how often oil had to be topped up.

• Sudden loss of power12 owner complaints

  Start the engine cold and listen for knocking or ticking. Check for warning lights, oil leaks and a low oil level, and ask how often oil had to be topped up.

• Sunroof shattered8 owner complaints

  Look underneath for rust, especially on the frame and brake lines, and check that door and panel gaps are even.

Make sure these recalls were done

Recall repairs are free at any dealer of the brand. Ask the seller for proof, or have a dealer check the VIN.

• Air bagsRecall number 26V332000, May 21, 2026
• Air bagsRecall number 24V064000, Feb 1, 2024
• Power trainRecall number 21V939000, Dec 2, 2021

Service bulletins worth asking about

Repair instructions the maker sent to dealers for known problems. Ask whether any of these repairs were done.

• Oil leak at the cam chain tensioner inspection cover due to and insufficient sealant adhesion on the...Sep 17, 2025
• The front and/or rear brakes make a high-pitched squeal when the brakes are lightly applied at 24 km/h (15...May 30, 2025
• The front and/or rear brakes make a high-pitched squeal when the brakes are lightly applied at 15 mph or...May 11, 2024
• The front and/or rear brakes make a high-pitched squeal when lightly applied at 15 mph or lessApr 2, 2024
• During engine start in cold conditions, a miscalculation in the PCM causes the air-fuel ratio to exceed...Mar 27, 2024
• Dealer MessageFeb 15, 2024

Before you pay

• Decode the VIN and make sure it matches the title, the registration and the car itself.
• Get a vehicle history report to check for accidents, salvage or flood titles and odometer problems.
• Ask for service records, especially oil changes and any transmission fluid service.
• Start the car from cold, and drive it at city and highway speeds for at least 20 minutes.
• Have an independent mechanic inspect the car before you sign anything.