ApplicationCompatible for Hyundai Elantra All Models Pre-Compatible for cat 2004-2008 Compatible for Hyundai Elantra Models Up to 04/03/2009 Pre-Compatible for cat 2009 Compatible for KIA Spectra 2.0L Engine Pre-Compatible for cat 2004-2009OEM Number or Interchangeable Part Number39210 23700, 39210 23900, 3921023700 234-5430, 24304, 2133902, 15646SpecificationCondition: Brand New Warranty: one year warranty for any manufacturing defect Quantity: 1 xAir Fuel Ratio Oxygen Sensor O2NotePlease confirm your original part number or oem numbr can matche up with one of the part numbers above. Professional installation is highly recommended (No Instruction Included). For whatever we can help,please feel free to contact us.