Electric System
Alternator, starter, hybrid battery and related systems, regular battery, battery cables, engine harness, coil, ignition switch, electronic ignition, distributor or rotor failure, spark plugs and wires failure.
What Owners Say
"Cruise control became sporadic and then just quit working. After reporting the problem at my next service experience, I was told the cruise control switch had failed and a new one was installed. The system has worked fine since then"
Anonymous, CA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"In very cold weather, the entire digital dashboard goes away -- no speedometer or gauges. Once the ice on the switch melts, the electronics return"
Lawrence R., IL (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Had to replace headlight assembly for second time"
John L., MD (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"One or both lights turn off intermittently. Turn switch off & back on lights work for a short period of time. Time duration not consistent"
Robert D., AK (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Have had to replace lights almost every year. Expensive for bulb and very expensive for labor"
Anonymous, VA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"The HID headlight on the right is intermittent. Turning the lights off and back on restarts it. I plan to replace myself. The dlr charges over $400"
Anonymous, CA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Had to replace passenger side headlight for the 2nd time in life of the car. very expensive"
Anonymous, CA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"The headlights are dimmer than they should be, especially in cold weather. If we leave the car parked outside when it is 0 degrees, one light sometimes will not work. I had the covers buffed ($80) which helped some with the brightness. The dealer"
Tim B., WY (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Had to recently replace the passenger headlamp again after only about 14 months"
Anonymous, VA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"INTERMITTENTLY WOULD GO OFF"
Marshall C., ME (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"The headlights would periodically go off while driving at night"
Anonymous, VA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"One headlight cuts out intermittently. Turn lights on and off to fix the problem. Headlight leveling sensor died. Ridiculously expensive to replace!"
Anonymous, NH (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Bulbs do not last long enough and they are very difficult to change. The dealership wants hundreds of dollars to change the bulbs because they claim that the bumper must be dropped in order to reach the bulbs"
Chuck S., IL (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Mechanism that automatically vertically aligns headlights failed. $600 repair price kept me from getting repair"
Thomas C., IA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Left front headlight-dealer charged $300 to replace"
J H., DE (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Headlights were intermittently turning off. Required replacement of headlight modules on both sides"
James B., CA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Toyota Prius has issues they are unwilling to address. Headlights go out randomly, at times completely. Toyota will not fix it even thought it is a serious safety issue"
Fred B., CA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"plastic headlight casing becomes "foggy" even though I've had it fixed before. This cuts down on the strength of the headlights; they appear dim and don't light up the driving area adequately"
Janice N., CO (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"All lights suddenly went out while driving at night, then soon came back. Dealer was unable to diagnose. Also, one headlight has failed, then came back without any action on our part"
Andrew H., NM (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"The xenon light section on one headlight burned out"
Anonymous, WA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"One headlight stopped working. Replacing the bulb is a major job because there's no room behind the headlight to reach in and remove it. The fenders have to be loosened, so I had both replaced at once. This is the first time I've had to have a headlight bulb replaced"
W S., DC (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Needed replacement headlight, surprisingly expensive"
Anonymous, CA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Left headlight went out was 300+ to replace"
John R., WA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"difficult to repair"
Peter K., MA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Left front headlight works intermittently. Cost of repair very high due to need to remove large portion of bumper to access headlight"
Anonymous, VA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"The left front headlight went out but it is an over complicated fix that costs $500 to fix, so we haven't fixed it"
John M., OR (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Headlight went out and it's impossible for anyone but the dealer to fix. It also is very expensive"
Kimura F., CA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"$450 to replace headlights w non Toyota parts. Craziness! I watched a YouTube video and it's too complicated to do w/o all the tools"
L L., VA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Rear brake led lights failed. Had to replace entire cluster/fixture"
Anonymous, MA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"When taillight stoplights failed, in this case, go very dim, they are a set of led's and the whole taillight assembly must be replaced. Costly, $348"
Anonymous, CA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Right rear stop lights went out, they are encased led lights, had to replace the entire esembly"
Rudy J., MO (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"The brake lights are a panel of LEDs. They cannot be replaced, the entire tail light assembly has to be changed. The driver's side failed last year and now the other side is out. I will replace with an aftermarket assembly for about $80 vs $300"
Anonymous, CA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"The brake lights are LED's in a cluster. Some of the LED's stopped working. Unfortunately this is not a simple replacement of a bulb to get the brake lights working but required replacement of both entire rear light assemblies which was very expensiv"
Gary K., NY (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Tail light "array" (big tail light unit) went out while traveling. Dealer in FL told me part was approx. $750. I think total bill was near $900 to repair"
Anonymous, MN (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"The driver's side brake light (composed of LEDs) is not working. To be assessed at dealer in coming weeks"
Anonymous, CA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Seems to be related, as the headlights failed along with interior dash lights and parking lights simultaneously"
Andrew H., NM (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Light are constantly unplugging in various parts of the car and have to be manually re plugged, running lights and taillights"
Anonymous, CT (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"LED taillight on one side quit, then worked again, then quit. This happened a few times until we replaced the light"
John L., MD (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Both taillights are starting to go out. Since the lights are configured as one unit, you cannot just replace faukty bulbs...have to pay for the entire unit"
Anonymous, OR (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Taillight 212 for part alone and replaced myself. Ouch!"
L L., VA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"I had to replace an interior light"
Richard G., CA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"The Toyota smart key interacts with the car's keyless entry system that is charged by the starter battery. This problem was resolved with the correction to the new starter battery installation which affected the concurrent horn problem"
Anonymous, MD (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Failure of starter battery. Diagnosed after third breakdown"
Anonymous, CA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"The engine light was going on, but nothing appeared wrong. Took to Toyota, and they could find anything"
Chris W., NY (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)"Problem was with the replacement starter battery, which was not charging properly, causing the horn (alarm) to not stop blasting when attempting to engage a battery charger. Problem was improper installation of the new battery and the posts causing intermittent open circuits when driving so that the battery charge dissipated"
Anonymous, MD (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)
"Headlamp bulb VERY expensive, $175. Labor to replace also very pricy, $155 I also had to have the clear plastic housing for the headlights polished to eliminate the yellowing, $60 for one side. The other side is new due to being hit while parked"
Anonymous, CA (2004 Toyota Prius None 1.5-L 4 Cyl hybrid)