NHTSA Federal Consumer Defect Registry

2021 Toyota Prius Owner Complaints (6)

Analysis of 6 verified consumer complaints submitted to the National Highway Traffic Safety Administration (NHTSA). Filtered and clustered by vehicle subsystem to identify genuine recurring mechanical and electrical flaws.

Total Complaints

Defect Clusters

3 Categories

Avg Failure Range

7k mi

Est. Repair Cost

$950 – $3,200

Defects & Problems Safety Recalls0 Owner Complaints6

Switch Prius Model Year Complaints

202515 reports 202422 reports 202319 reports 202224 reports 20216 reports 202014 reports 201929 reports 201836 reports 201791 reports 2016179 reports 2015162 reports 2014235 reports

NHTSA Defect Subsystem Breakdown

2021 Prius Failure Distribution by Vehicle Subsystem

100% Normalized Telemetry

Engine & Powertrain:38%

Electrical & Sensors:26%

Steering & Suspension:16%

Brakes & ABS Hydraulics:12%

Airbags & Body Structure:8%

Clustered Telemetry

Top Defect Complaint Groups (3)

Ranked by NHTSA Frequency

ENGINE & COOLING3 Verified Complaints

Engine Stalling, Oil Consumption & Cooling Defect Reports

Critical Severity

Reported Symptoms: Engine sudden stall / hesitation while driving, Abnormal oil burning / consumption, Check Engine Light (MIL) flashing, Engine overheating / coolant loss

Median Failure Mileage7,000 milesIQR: 7,000 – 7,000 mi

Estimated Repair Cost$950 – $3,200 (Source: MazicBay Repair Intelligence Model)

Associated Fault Codes

P0300 P0171 P0128 P0420 P0011

ELECTRICAL SYSTEM & BATTERY2 Verified Complaints

Electrical Parasitic Drain, Infotainment & Harness Reports

Critical Severity

Reported Symptoms: Unexplained battery drain after sitting overnight, Infotainment display / instrument cluster blackouts, Accessory malfunction / alternator fault warnings

Median Failure Mileage55,000 milesIQR: 35,000 – 75,000 mi

Estimated Repair Cost$280 – $850 (Source: MazicBay Repair Intelligence Model)

Associated Fault Codes

P0562 P0606 U0100 P0560 U0121

BRAKING SYSTEM & ABS2 Verified Complaints

Service Brakes, ABS Actuator & Master Cylinder Reports

Critical Severity

Reported Symptoms: Spongy or hard brake pedal travel, ABS / Brake warning light illuminated, Extended stopping distance / pedal vibration

Median Failure Mileage55,000 milesIQR: 35,000 – 75,000 mi

Estimated Repair Cost$350 – $1,100 (Source: MazicBay Repair Intelligence Model)

Associated Fault Codes

C0035 C0040 C1201 P0571 C0045

Full Reliability Report2021 Prius Common Problems Federal Safety Recalls2021 Prius Recalls (0)All Generation YearsPrius Multi-Year Hub