Headlights will go off and on. When they go out, you can turn off the lights (with interior switch) and then back on and they will work. The light goes out periodically. When it does, it goes off/on for several days in a row, then it will remain on for several days.

- Mountain House, CA, USA

Hid headlights go out.

- Augusta, ME, USA

Headlights intermittently turn off, cycling power turns them back on but will go off again.

- Alamogordo, NM, USA

Hid headlight on the driver's side went out and seems to be intermittent. This occurred while driving during darkness. I anticipated that the light had burned out, even though hids are supposed to last much longer than traditional bulbs. I called the dealer to get a quote for replacement nearly $325 for the hid, no labor. I pulled the old hid light out, but before replacing, I put it in again and found it working. This seems to be an hid controller problem. I have since found out that it can be "reset" by turning the light switch off and back on to reset the computer controller.

- Matthews, NC, USA

2007 Toyota Prius hid headlight on passenger side goes out after 1 minute of driving. Will relight momentarily after power switch is turned off, then on. Issue began shortly after expiration of 36K mile warranty. Repair quotation: $950. Issue impairs driving visibility.

- Tarzana, CA, USA

I purchased a used 2007 Toyota Prius with hid lights on August 23 2009. Contrary to the findings of the investigation that was posted on your site, both of my lights went off simultaneously on 3 separate occasions within 2 weeks of my purchasing the car. My dealer serviced the problem by replacing both hid light bulbs. I believe it is dangerous, whether one or both bulbs go off, and the problem should be corrected by the manufacturer. Also, the customer should be made aware of the problem at the time of purchase.

- Brecksville, OH, USA

2007 Toyota Prius headlight is flickering on and off. Car has low miles and I have not hit anything. This is a huge safety issue and I am unable to shell out the $400 plus for the simple hid light.

- Irvine, CA, USA

The head lights in our 2007 Toyota Prius turn off for no reason. Sometimes it is just the right headlight but it is changing to both headlights now more and more often. The result is sometimes total darkness at night while driving creating a big safety issue !

- Half Moon Bay, CA, USA

Toyota Prius, 2007 left headlight goes off during long drives then turns back on after lights are switched off. Intermittent failure.

- Elgin, IL, USA

I purchased a new 2007 pruis in June of 2007. In Dec., 07, the driver side headlight assembly got water in it. The dealer replaced under warranty. In Mar. 08, passenger side headlight went out. The dealer replaced under warranty. Aug.13, 09, driver side headlight went out again. Dealer said it was no longer covered under the 1 yr warranty and I would be responsible for the almost $400 cost. Not being happy about that...... dealer did agreed to pay for replacement. 1 week later, Aug. 22, 09, passenger side headlight.... out again. As well as the marker bulb on same side. Dealer has agreed to replace bulb if I pay a $48 charge. While I understand that is a great discount and appreciate them working with me, I am boggled that I have had 4 headlights replaced on a car that is 2 years old and no one seems to feel this is a problem. I am tired of being told "headlights go out", I believe this is a safety issue and should be investigated. It only takes typing in "Prius headlight problems" on google to see the several hundred if not thousands of complaints in the forums for this very same problem. Is it possible that it is not the bulb that is the real issue, but rather something bigger? please investigate.

- Glendale, AZ, USA

2007 Prius-headlights, single or both will fail during driving, turning off headlight switch and back on restores lights. No warning is given that lights have failed.

- Holland, MI, USA

Driver side headlight failure. Had to turn off headlights, very dangerous at night, to get headlight to turn back on. This happens a few times a week, usually comes in spurts. Looked up in your investigations and found PE09019. This describes my problem, except that so far it only happens on driver side headlight. I hope that the investigation and solution is found before I experience problems with both headlights.

- Adamstown, MD, USA

2007 Toyota Prius driver's side headlight goes off without warning although bulb is not "burned out" light relights after turning headlights off then on again. This is a safety issue. Based on other complaints it is not as simple as just replacing a bulb. Therefore the problem may persist for days and longer especially at the prices quoted by dealers to "maybe fix the problem" you better take action and force the recall.

- Horseheads, NY, USA

Toyota Prius 2007, 34000 miles: Intermittent headlight failure. Hid type headlights. The driver's side headlight goes out intermittently, and can be turned back on by turning lights all the way off and on again. It happens often. The brights on that side also go out. I will contact my dealer and Toyota tomorrow for a repair. Seems to be a common problem amongst Prius owners with this type of headlights, as noted with a internet search.

- Richfield, MN, USA

I had no warning leading up to the failure with my headlights. The failure involves both headlights going off while driving. This failure started in July 2009 and continues whenever the headlights are on. The result is total darkness at night while driving creating a serious safety issue. The first time it occurred was on an unlit road with many curves nearly causing me to go off the road. I was able to stop without crashing and turned the headlight switch off and then on again; the headlights came back on, I continued driving and after a few seconds it happened again. In has now become a process of turning the headlights off and on constantly while driving at night. We drive the car as little as possible after dark. I have contacted the Toyota dealership where the car was purchased and was told the headlight bulbs needed to be replaced and the cost per light bulb was over $350 each plus labor which is also very expensive due to the need to remove the front bumper in order to change the bulbs. I am looking at least $1000 just to replace two light bulbs!!!! I was given no other options and the technician told me I would still have to replace these every one or two years. I searched online for others having this same problem and found that it is a very common issue and many people are having this same problem. I called the dealer again to ask about replacing the high intensity lights with the conventional headlights used on models without high intensity headlights. Although the conventional lights are available for the Prius they will not interchange with the high intensity bulbs without major wiring harness changes. I was also told that even the Prius with the conventional bulbs needed front bumper removal to change.

- Camano Island, WA, USA

I have bought a 2007 Toyota Prius that has had headlight work done on it (bulbs replaced) but the problems have continued with my ownership. They work, then one goes out and you have to turn them on/off before they work again. I have made an appointment with Toyota, but don't believe they cover headlamp problems.

- Troy, NY, USA

Headlights on my 2007 Toyota Prius go on and off randomly. Both went off at same time almost causing me to wreck. Started at 40K miles. Out of warranty and dealer wants to replace bulbs for $568. This is a rip off and a safety issue.

- Apex, NC, USA

The headlights on my 2007 Toyota Prius keep turning off @ random times. At first it only seemed to be one headlamp, but now both of them turn off when I am driving. I can only get them to come on by turning the headlamp switch off and back on. At this point I am forced to drive with my fog lamps on all the time at night because of safety.

- Ft Collins, CO, USA

We have a 2007 Prius that we love. However, both headlights turn off unpredictably, and the passenger side headlight is often off, again unpredictably. One of the rear passenger side taillights, not the brakelight, also turns off from time to time.

- Staten Island, NY, USA

The driver's-side headlight turns off randomly. Turning the lights completely off and then back on will make the headlight come back on. It stays on from 1 to about 10 minutes, then goes out again.

- Post Mills, VT, USA