2018 Toyota Prius problems and complaints
Owners have filed 36 complaints with NHTSA about the 2018 Toyota Prius. The most-reported areas: Exterior Lighting (5), Visibility/Wiper (5), Unknown Or Other (5).
Key takeaways
- 36 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 |
|---|---|---|
| Exterior Lighting | 5 | 14% |
| Visibility/Wiper | 5 | 14% |
| Unknown Or Other | 5 | 14% |
| Service Brakes | 4 | 11% |
| Vehicle Speed Control | 4 | 11% |
| Engine And Engine Cooling | 3 | 8% |
| Air Bags | 3 | 8% |
| Structure | 3 | 8% |
| Electrical System | 2 | 6% |
| Engine | 2 | 6% |
| Seats | 2 | 6% |
| Power Train | 2 | 6% |
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.
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,...
Exterior Lighting - filed 2026-03-13
Both taillamps holding moisture. Could cause electrical issues or fire. .. same year and model car have same reported issues and were fixed by manufacturer. This vehicle is the same but different level.
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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.