Two problems related to brake light 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.
The passenger side brake light does not work.
1) on a 95 degree day the car was parked in the sun. 2) brake light assembly deformed in the heat obscuring some of the 6 led reflectors. The black plastic used in the assembly does not hold up to the heat. 3) I complained to Toyota corporate in California to fix the source of the problem. Nothing done to date.