AutoUtility currently tracks 15 official NHTSA owner defect complaints for the 2018 Toyota Prius Prime. Powertrain & Transmission issues are the most frequently reported category, appearing in 2 complaints (13.3% of submitted records). Among these NHTSA complaint records, 4 filings cite a crash, 2 report one or more injuries.
Factual proportion of owner complaints categorized by automotive subsystem in NHTSA records
2 owner complaints submitted to NHTSA ODI for this subsystem.
2 owner complaints submitted to NHTSA ODI for this subsystem.
2 owner complaints submitted to NHTSA ODI for this subsystem.
2 owner complaints submitted to NHTSA ODI for this subsystem.
Formal engineering analyses and preliminary evaluations opened by the NHTSA Office of Defects Investigation
Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation
"On at least 4 occasions when the EV battery becomes depleted while driving at highway speeds and the car is switching to gas, the engine completely loses all power. This has lasted from 10-30 seconds. The dealership said a small battery needed to be replaced, and replaced that, but this recurred..."
"There has been at least 4 times that the vehicle was not responsive to acceleration (stalled for a few seconds) then picked back up. Problem has been intermittent. There is no dash indication of an issue. Because concern is intermittent I haven’t taken vehicle in. There is NO CHECK ENGINE light on...."
"Hi, My Prius Prime recently just suffered the loss of heat in the middle of winter. Based on the diagnostic of my local Toyota dealer, it appears one of the metal heater coolant hose had rusted off. This is not just causing a safety issue of having no issue, it is also a risk as the engine can now..."
"My 2018 Toyota Prius Supreme was parked too far away from the curb in front of a house where we were invited, in a residential area in Naperville IL. I entered the car to park it properly. I had my foot on the brakes and pressed the starting button for the engine to turn on. I then put the car on..."
"Airbags deployed prematurely as I was parking my car in a doctor's office parking lot. The car was going less than 5 mph and I did not hit anything. The premature deployment of the airbag startled me and caused me to hit the accelerator instead of the brake and I ended up crashing my car into a..."
Reported defect complaint volume across sibling model years (2017–2024)
| Model Year | NHTSA Complaints | Crash Reports | Safety Recalls | Detailed Report |
|---|---|---|---|---|
| 2017 Toyota Prius Prime | 143 | 20 | 0 | View 2017 Problems → |
| 2018 Toyota Prius Prime Current Page | 15 | 4 | 0 | Current |
| 2019 Toyota Prius Prime | 8 | 0 | 1 | View 2019 Problems → |
| 2020 Toyota Prius Prime | 16 | 5 | 1 | View 2020 Problems → |
| 2021 Toyota Prius Prime | 10 | 4 | 0 | View 2021 Problems → |
| 2022 Toyota Prius Prime | 8 | 3 | 1 | View 2022 Problems → |
| 2023 Toyota Prius Prime | 5 | 0 | 4 | View 2023 Problems → |
| 2024 Toyota Prius Prime | 11 | 1 | 4 | View 2024 Problems → |
Complete distribution of consumer defect reports across all 12 granular NHTSA system and subsystem classifications
| Vehicle Component / System | Total Complaints | Crash Reports | Fire Reports | Injury Entries | Fatality Entries |
|---|---|---|---|---|---|
| Air Bags NHTSA category: AIR BAGS | 2 | 2 | 0 | 3 | 0 |
| Powertrain NHTSA category: POWER TRAIN | 2 | 0 | 0 | 0 | 0 |
| Other / Uncategorized NHTSA category: UNKNOWN OR OTHER | 2 | 0 | 0 | 0 | 0 |
| BACK OVER PREVENTION,FORWARD COLLISION AVOIDANCE | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| Engine NHTSA category: ENGINE | 1 | 0 | 0 | 0 | 0 |
| EXTERIOR LIGHTING | 1 | 0 | 0 | 0 | 0 |
| Fuel & Propulsion System NHTSA category: FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| Service Brakes NHTSA category: SERVICE BRAKES | 1 | 1 | 0 | 0 | 0 |
| STRUCTURE,VEHICLE SPEED CONTROL,UNKNOWN OR OTHER | 1 | 1 | 0 | 0 | 0 |
| Visibility / Glass NHTSA category: VISIBILITY | 1 | 0 | 0 | 0 | 0 |
| Visibility & Wipers NHTSA category: VISIBILITY/WIPER | 1 | 0 | 0 | 0 | 0 |
Cross-reference safety recalls, crash test safety ratings, and EPA fuel economy for this model year
Key performance indicators, EPA fuel economy specs, powertrain variants, and summary ratings.
Official recall campaigns, safety defect descriptions, and manufacturer free remedy instructions.
NHTSA 5-Star NCAP crash test results, driver assistance systems, and rollover resistance ratings.
EPA fuel economy ratings, electric range, and annual energy cost benchmarks.
Direct, deterministic answers synthesized from verified United States government databases for the 2018 Toyota Prius Prime
In official NHTSA consumer records, the most frequently cited issue area for the 2018 Toyota Prius Prime is Powertrain & Transmission, appearing in 2 records (13.3% of submitted filings).
Secondary reported categories include Visibility, Wipers & Glass (2) and Driver Assistance & Safety Tech (2).
AutoUtility does not issue subjective reliability scores or commercial ratings. In official United States government records, NHTSA tracks 15 consumer defect complaints and 0 safety recall campaigns for the 2018 Toyota Prius Prime.
Reviewing documented component complaint distributions, recall remedy notices, and active federal investigations provides an objective, evidence-based view of the vehicle's historical safety and defect record.
Among consumer complaint records on file with NHTSA for the 2018 Toyota Prius Prime, 4 filings cite a crash, 0 cite smoke or fire, and 2 report one or more injuries.
Incident entries represent consumer descriptions at the time of submission to federal authorities and do not establish mechanical causation or legal liability.
NHTSA ODI records list 1 formal defect investigation involving the 2018 Toyota Prius Prime (all closed).
Federal defect investigations are formal engineering evaluations opened when safety defect trends emerge, and do not by themselves establish a confirmed defect or mandatory recall.
The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database under 49 CFR Part 576.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.