Two problems related to brake drum wheel cylinder have been reported for the 2003 Toyota 4Runner. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Toyota 4Runner based on all problems reported for the 2003 4Runner.
Tamara recall : the master brake cylinder has went out and everyone who I have spoke with has told me these particular vehicles are bad about. My brakes go all way to the floor no pressure at all and will not stop. I was on al hwy 278 in piedmont and went straight through red light almost getting it from from and rear of truck.
The contact owns a 2003 Toyota 4runner. While driving at 65 mph, the brake pedal was depressed and felt stiff, which caused a longer braking time. When the failure first occurred, all the warning indicators were illuminated on the instrument panel. The vehicle was towed to a dealer, but the failure could not be duplicated and there were no warning indicators illuminated. An independent mechanic diagnosed that the vehicle was losing brake power while being operated at higher speeds. The mechanic recommended that the master brake cylinder assembly be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 90,000.