Two problems related to catalytic convertor have been reported for the 2006 Toyota 4Runner. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Toyota 4Runner based on all problems reported for the 2006 4Runner.
Toyota 2006 4runner 4wd limited discharges a sulfur smell when I accelerate, especially when I am going up a hill. The smell is strong even when my windows are up. I'm also concerned about the smell being a health issue. I purchased the car brand new in February 2006.
When my 2006 Toyota 4runner is running or when acceleration a rotten egg smell comes from the catalytic converter. I have taken the vehicle in and the dealer claims there is nothing they can do. I have never had this problem on any other vehicles I have owned.