AI Damage2012 Toyota Prius C: common problems
Owners of the 2012 Toyota Prius C filed 65 complaints with NHTSA, most often about service brakes and electrical system. Details by component below, with sources.
Key figures
- Owner complaints
- 65
- involving a crash
- 9
What fails most often
- 1 Service brakes 40% of all complaints
- 2 Electrical system 23% of all complaints
- 3 Air bags 12% of all complaints
- 4 Engine 8% of all complaints
- 5 Electronic stability control 6% of all complaints
- 6 Powertrain 6% of all complaints
- 7 Seat belts 6% of all complaints
- 8 Exterior lighting 5% of all complaints
- Service brakes: 26 complaints (40% of all), 2 of them with a crash reported by the owner.
- Electrical system: 15 complaints (23% of all), 1 of them with a crash reported by the owner.
- Air bags: 8 complaints (12% of all), 7 of them with a crash reported by the owner.
- Engine: 5 complaints (8% of all).
- Electronic stability control: 4 complaints (6% of all).
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 1.5 L · hybrid · 4 cyl
- CVTnamed in 1 complaints
Drive: FWD
Symptoms owners describe
How many of the 65 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Service brakes | 26 | 2 | 0 |
| Electrical system | 15 | 1 | 0 |
| Air bags | 8 | 7 | 0 |
| Engine | 5 | 0 | 0 |
| Electronic stability control | 4 | 0 | 0 |
| Powertrain | 4 | 1 | 0 |
| Seat belts | 4 | 3 | 0 |
| Exterior lighting | 3 | 0 | 0 |
| Seats | 3 | 0 | 0 |
| Vehicle speed control | 3 | 2 | 0 |
| Forward collision avoidance | 2 | 0 | 0 |
| Fuel/propulsion system | 2 | 0 | 0 |
| Visibility | 2 | 0 | 0 |
| Steering | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
The air bags failed to deploy upon impact. A bystander inside the store assisted the contact in exiting the vehicle. Law enforcement responded to the scene and administered a breathalyzer test, which returned negative for alcohol. A police report was filed, noting minor scratch damage to the storefront's concrete.
My wife hit a deer at highway speed. The airbags deployed. The drivers side lower airbag deployed in the footwell. The driver was unable to get to the break paddle to stop due to the airbag at het feet. She had to use the emergency brake to stop the vehicle.
I was alone in the car, but now my insurance is trying to claim "my fault", when the car accelerated on its own. There was no floor mat being stuck, etc. Issue. This is a known issue with toyota and unintended acceleration with prior regular toyota prius year models. I am still awaiting an insurance inspection etc.
None of the my airbags went off and my seat belt did not lock. I hit the steering wheel with such force I had the toyota symbol imprinted on my chest for a day. (I was wearing 3 layers a jacket and 2 shirts).why did none of the safety features work?
Upon impact with the cars it was slammed into the driver's seatbelt did not lock. Driver flew forward breaking bones in his face and obtained injuries to a knee from impacting the console, and whiplash. A child passenger in the back seat obtained a knot on head and whiplash. Air bags did not deploy.
The contact stated that while exiting a residential driveway, another vehicle crashed into the vehicle and all of the air bags failed to deploy. A police report was filed and no injuries were reported. The vehicle was destroyed. The manufacturer was made aware of the failure but did not offer any assistance.
Rear axle has cracked at weld joint causing the tire to sit off center.
There were several warning lights illuminated. The vehicle was towed to the local dealer, where it was diagnosed with an internal power module transmitter and MG control computer inside the inverter assembly failures. The vehicle was not repaired.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 4,606 of 36,656 model years in the NHTSA data (top 13% most complained about).
On average one model year of the Prius C has 19 complaints (10 years in the data). This year has 65, above average.
What to check before buying
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
Other years of this model
Questions and answers
What are the most common problems with the 2012 Toyota Prius C?
Owner complaints to NHTSA most often mention: service brakes, electrical system, air bags. Total complaints: 65. The most frequent symptoms in complaint texts: warning lights, check engine (18%), stalls while driving (9%), seat belts (6%).
How many service bulletins (TSB) were issued for the 2012 Toyota Prius C?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2012 Toyota Prius C from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2012 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.