One problem related to brake drum wheel cylinder has been reported for the 2005 Toyota 4Runner. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Toyota 4Runner based on all problems reported for the 2005 4Runner.
The master brake cylinder completely failed thus rendering the brakes completely inoperable. To stop the vehicle, the car was placed in p and shut down. It was towed to the dealer for inspection. This car had been serviced per the manufactures schedule since it was purchased in 2005. For almost two years, we had heard an oscillating sound from the engine compartment. The local dealer was made aware of this, but unable to diagnose the problem. The last visit was 4 months ago at which time they did not find a problem, but the sound continued. Highly dangerous situation. Luckily there was not an accident.