Three problems related to headlights turn off while driving have been reported for the 2004 Toyota Prius. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Toyota Prius based on all problems reported for the 2004 Prius.
Headlights occasionally go out at random while driving. Began with driver side, very intermittent, became more frequent, now also includes passenger side. Both have gone out at the same time while driving at night twice. Turning all lights off briefly and back on will re-illuminate the headlights. Problem first occurred several months ago and has gotten progressively more frequent. Now, once light(s) goes out during a drive, it will continue to do so repeatedly every few minutes. Very dangerous.
2004 Toyota Prius with hid option. One or both hid headlights go out while parked or driving. Turning the light control on and off will temporarily solve the issue. The issue is random in nature. For instance, I noticed one headlight went out this morning and before I could turn the switch to reset the other headlight went out, leaving me in the dark on the road. The vehicle may be park or in motion. There appears to be no direct relation to environmental factors. Extremely dangerous when driving on rural roads with no street lights. It appears to me to be a ballast issue. This repair requires working with high voltage components and goes beyond the scope of a diy project. This has been an ongoing issue for me, but only recently have both headlights started to fail at the same time. Thank you.
The headlights go out randomly while driving at night. You have to turn them off and then turn them back on for them to work and they only last a minute after that. Huge safety issue!!.