Compatibility: For 1999 Toyota 4Runner 2.7L For 1999-2000 Toyota 4Runner 3.4L For 2000 Toyota Tacoma 3.4L Benefits: 1.Dual Insulated Protective Cover Prevents premature zirconium sensor wear 2.Laser welded sensor body to keep out contaminants 3.Internal Ceramic Insulation for optimal sensor performance. 4.Sealed wire leads prevent moisture interference with electronic signal Q&A: Q1:Why the oxygen sensor important for your vhiche? .
