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2021 Kzrv SonicProblems, recalls & complaints

NHTSA has logged 1 owner complaint about the 2021 Kzrv Sonic, most often about the service brakes. It is covered by 3 safety recalls, and for recall 21V-670 the manufacturer reports only 31% of affected cars repaired.

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CarFlaw IndexNot enough dataHigher is better (0–100)
Safety recalls3Lowest repair rate 31%Owner complaints10 with a crash, fire or injuryTop problem1Service brakes

Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through May 2, 2022. Updated daily.

Complaints by system

Where the 2021 Kzrv Sonic has problems

1 complaint grouped by the system owners reported.

Box size = number of complaints naming that system. Darker = larger share. One complaint can name more than one system.
Complaints by system
SystemComplaintsCrash, fire or injury
Service brakes10

Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.

3 recalls

2021 Kzrv Sonic recalls and how many were fixed

Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.

36%repaired · 2024 Q1

Lpg systems: lines and fittings

Recall 22V-289 · May 2, 2022 · 11,906 vehicles · 4,272 repaired

Risk. A gas leak in the presence of an ignition source can increase the risk of a fire.

Problem, fix and repair progress →

31%repaired · 2024 Q1

Recreational vehicle/trailer: lpg systems

Recall 21V-670 · Aug 27, 2021 · 34,345 vehicles · 10,673 repaired

Risk. Increased propane pressure can enlarge the flames in gas appliances, increasing the risk of a fire.

Problem, fix and repair progress →

43%repaired · 2022 Q4

Wiring: fuses and circuit breakers

Recall 21V-013 · Jan 15, 2021 · 806 vehicles · 347 repaired

Risk. Being connected to the wrong amperage circuit breaker may not provide adequate circuit protection, increasing the risk of a fire.

Problem, fix and repair progress →

Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Kzrv.

Best & worst years

2021 vs. every other Sonic year

Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the Sonic median. How we score

'14'15'16'17'18'19'20'21'22'23
  • Avoid
  • Caution
  • Solid
  • Best
  • Not rated
In owners' words

What Sonic owners report

Recent service brakes complaints filed with NHTSA, shortened. Personal details are removed.

BOUGHT NEW VENTURE TRAVEL TRAILER. ELECTRONIC BRAKES DID NOT WORK. TOOK BACK TO DEALER. THEY FOUND THE BRAKE BACKING PLATE WAS INSTALLED INCORRECTLY AND FIXED THE PROBLEM UNDER WARRANTY.
Complaint 11414416 · Apr 29, 2021

Own a 2021 Sonic?

Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.