YearToAvoid

2021 Toyota Prius Prime Reliability Data: Problems & Recalls

Avoid The 2021 Toyota Prius Prime has a complaint index of 86, ranking 2nd worst of 8 model years, with a verdict of Avoid. Owners reported 10 complaints, mostly involving the Electrical System (40%) and Brakes (30%), with 4 crashes and 2 injuries; no recalls are listed.

Based on NHTSA complaints per model-year, not a reliability rating. Methodology

YearToAvoid Scorecard

Complaint Index
86/100
#2 of 8 Prius Prime years
Verdict
Avoid
vs. other years of this model
Complaints
10
unique NHTSA reports
Recalls
0
distinct NHTSA campaigns
Crashes
4
reported in complaints
Fires
0
Injuries
2
Top issue
Electrical System
Best nearby year
2023
rated Best
NHTSA overall rating
5 / 5 ★
EPA combined MPG
54
55 city / 53 hwy
Injuries / deaths
2 / 0

Top 2021 Toyota Prius Prime problems

Share of this year’s NHTSA complaints by component group. Groups with 15+ complaints have their own page.

  1. Electrical System4 (40%)
  2. Brakes3 (30%)
  3. Engine2 (20%)
  4. Collision Avoidance & Cameras2 (20%)
  5. Fuel System2 (20%)
  6. Transmission & Powertrain2 (20%)
  7. Airbags1 (10%)
  8. Other1 (10%)
  9. Visibility & Wipers1 (10%)

A complaint can list more than one component, so shares add up to more than 100%. Shares are % of complaints.

What owners report

  • Some owners report the brakes failed to respond after a collision, leaving the car unable to stop or move.
  • One owner described the vehicle rolling away on its own after being shifted into park and the key removed.
  • Drivers report the rearview camera intermittently going black in reverse and while driving, with no warning light.
  • One owner reported the display screen becoming unreadable in bright sunlight.
  • One driver reported the brake pedal failing to respond while approaching a stop sign, causing the vehicle to accelerate and jump a curb.
  • One owner reported rodent damage to unprotected electrical components.
2021 Toyota Prius Prime complaints: complaints filed per month1May 2021Nov 2022Jul 2024Mar 2025Oct 2025
10 complaints filed with NHTSA from May 2021 to Mar 2026; peak May 2021 (1).

2021 Toyota Prius Prime recalls

No safety recalls on record for this model year.

2021 Toyota Prius Prime fuel economy and fuel cost

City
55 MPG
Highway
53 MPG
Combined
54 MPG
Annual fuel cost (EPA)
$1,200
15,000 mi/yr
Fuel
Regular Gas and Electricity
Current regular gas
$4.32/gal
national avg.

EPA figures; median across configurations of this model year. Estimate your own cost with the fuel cost calculator.

2021 compared with other Prius Prime years

Complaint Index by model year (0 = fewest issues, 100 = most)025507510020172018201920202021202220232024
Complaint Index: 0 = fewest issues, 100 = most, relative to other years of this model. Avoid Caution Good Best
YearVerdictIndexComplaintsRecallsMPG
2019Best08154
2020Caution5716154
2021Avoid8610054
2022Good298154
2023Best146450

All Toyota Prius Prime years: best and worst →

Frequently asked questions

Is the 2021 Toyota Prius Prime reliable?
Compared to other Prius Prime years, 2021 ranks 2nd worst out of 8 model years with a complaint index of 86, giving it an Avoid verdict.
What are the most common problems with the 2021 Prius Prime?
NHTSA complaints point mostly to the Electrical System (40% of complaints) and Brakes (30%), along with reports involving the Engine, Fuel System, and Collision Avoidance cameras.
Does the 2021 Prius Prime have any recalls?
NHTSA lists no recalls for the 2021 Prius Prime.
How many complaints does the 2021 Prius Prime have?
NHTSA lists 10 complaints for the 2021 Prius Prime, including 4 crashes and 2 injuries.
Which Prius Prime years are better than 2021?
NHTSA complaint data shows 2019 and 2023 rank as Best, while 2018 and 2022 rank as Good, all with lower complaint indexes than the 2021 model's 86.

Sources: NHTSA Office of Defects Investigation complaint and recall databases; U.S. EPA fuel economy data; NHTSA 5-Star Safety Ratings. Complaints are unverified owner reports.

Data updated Sep 24, 2026. Read the methodology and data sources. The Complaint Index is based on NHTSA owner complaints and recalls; it is not a reliability rating.