10.0

really awful
Crashes / Fires:
0 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
69,240 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2012 Toyota Prius engine problems

engine problem

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2012 Toyota Prius Owner Comments (Page 2 of 2)

« Read the previous 20 complaints

problem #5

Jan 032014

Prius 4-cyl

  • 32,775 miles

A D V E R T I S E M E N T S

The contact owns a 2012 Toyota Prius hybrid. The contact stated that the automatic startup engaged independently with a loud clunking noise. The vehicle was towed to an authorized dealer for diagnosis. The technician was unable to duplicate the problem. The vehicle was also diagnosed by a different dealer who refused to repair the vehicle. The manufacturer was notified of the problem. The vehicle had not been repaired. The approximate failure mileage was 32,775...updated 02-28-14 the consumer stated the vehicle was traded in. Updated 03/19/2014

- Spanaway, WA, USA

problem #4

Jun 012013

Prius 4-cyl

  • 3,000 miles
Moldy odor emits from vents. Had round rock Toyota dealership attempt to correct the issue four times and also had called up Toyota Corp but issue was never resolved. On the fourth attempt at the dealership, Toyota had authorized a carbon-type cabin filter that was suppose to be able to remove the odor but it did not help. Did not fix or replace the root cause of the issue. Food was never allowed in this vehicle; air vent was selector for fresh (not recirculate). This is my third but last Toyota. It breaks my heart to have purchased a brand new Prius and by 3000 miles, strong moldy odor exists. Dealer had sprayed lysol, provided ac refresh kit but evaporator or ventilation system is faulty. Toyota bulletin # T-sv-0142-13 (Sept 12).

- Round Rock, TX, USA

problem #3

May 082012

Prius 4-cyl

  • 600 miles
1. when vehicle transitioned from battery to motor, significant impact resulted 2. brake pedal traveled to floor, dash warning light came on [vehicle towed] 3. attempting to leave dealers lot, brake pedal traveled to floor. Technician witnessed. Updated 01/15/13

- Middleboro, MA, USA

problem #2

Sep 032012

Prius 4-cyl

  • 4,944 miles
Driving 70 mph car began to go into high RPM, then accelerated to 74 from 70 mph. I tried to decrease speed then vehicle shut off got a long beep and message on display "check hybrid system, pull over immediately" all lights on dash were indicating failures. Coasted to safety with 5 passengers in vehicle across traffic at 9:30 pm to shoulder. Tried to restart several times then vehicle went into high RPM then engine knocked loudly and was completely disabled. Lost brakes, pedal was hard, lost power steering, difficult to maneuver. I still had 2 bars indicating plenty of fuel in car. Prior fillup was 7.6 gallons at pump, usually get over 500 miles per tank, trip meter only showed under 400 miles since fill up so had plenty of fuel and there was no low fuel indicator. Reported all problems to dealer. They only noted the car shut down but told me they confirmed everything I said and that Toyota engineers are trying to resolve this since they are aware of this type of problem. So far dealer and Toyota have not addressed the high RPM, the acceleration, loss of electronics and hybrid system failure and told me they havenever heard of any Toyota ever having a report of a high RPM or acceleration without intent to accelerate form the driver. Vehicle is unsafe, has 4944 miles and this problem occurred about a month after purchase. Toyota still does not know what the problems are and in possession of the vehicle.

- Menifee, CA, USA

problem #1

Aug 242012

Prius 4-cyl

  • 9,550 miles
Hybrid engine suddenly shut down without warning while vehicle was traveling 65 mph on a busy freeway, causing vehicle to come an unsafe stop. Depressing accelerator had no effect. Onboard computer gave error message "check hybrid system. Stop the vehicle in a safe place." Restarting vehicle produced the same error message and still unable to shift vehicle into drive or reverse. Fuel tank full at time of incident. Vehicle purchased new 5 months prior from Toyota dealership. No aftermarket parts or modifications present.

- Rolling Hills Estates, CA, USA

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