2018 Toyota Prius problems and complaints
Owners have filed 37 complaints with NHTSA about the 2018 Toyota Prius. The most-reported areas: Unknown Or Other (6), Exterior Lighting (5), Visibility/Wiper (5).
Key takeaways
- 37 owner complaints on file with NHTSA.
- 5 involve a crash, 0 a fire, 2 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Unknown Or Other | 6 | 16% |
| Exterior Lighting | 5 | 14% |
| Visibility/Wiper | 5 | 14% |
| Service Brakes | 4 | 11% |
| Vehicle Speed Control | 4 | 11% |
| Engine | 3 | 8% |
| Engine And Engine Cooling | 3 | 8% |
| Air Bags | 3 | 8% |
| Structure | 3 | 8% |
| Electrical System | 2 | 5% |
| Seats | 2 | 5% |
| Power Train | 2 | 5% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2018 Toyota Prius 5 HB FWD | 5/5 | 4/5 | 5/5 | 4/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Unknown Or Other,engine - filed 2026-10-02
I am writing to inform you about a very dangerous situation that occurred to me in June 2026 and that could pose a significant safety risk to other drivers who own 2016-17-18-19 Toyota Prius cars. The risk stems from a defective part (the catalytic converter) that Toyota Corporation knew about in 2019 but failed to no...
Engine And Engine Cooling - filed 2026-08-17
The contact owns a 2018 Toyota Prius. The contact stated that while having a routine oil change, the contact was made aware that there was no coolant in the coolant reservoir. No warning lights were illuminated. The contact was constantly adding coolant to the coolant reservoir; however, the following day the coolant r...
Engine And Engine Cooling - filed 2026-06-26
The contact owns a 2018 Toyota Prius. The contact stated that while driving at an undisclosed speed, the engine constantly overheated. An unidentified warning light was flashing on the instrument panel. An independent mechanic inspected the vehicle and became aware that the coolant reservoir was empty. One month later,...
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More for the 2018 Toyota Prius
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.