Need advice for fixing O2 Sensor and Muffler in '03 Elantra GT

[awascholl]

I have a 2003 Hyundai Elantra GT, and I need to fix the O2 Sensor and Muffler. I tried doing a Google search for directions how to replace these parts myself, but had no luck. Is this something I could possibly do myself? I know the muffler is cracked close to the front of the car. The O2 sensor seems easy enough, but I have no idea where it's located.

Any suggestions and advice is greatly appreciated.

Thanks!

[Smokin' Dually]

Are you sure the O2 sensor is bad? It could be wires, best to be sure before you spend money on the part. On my '99 Elantra you need to pull the heat shield on top of the exhaust manifold to get to the sensor. To remove the shield and the sensor, you'll need to use heat. The quickest method is with a torch, oxy/fuel or oxy/acetylene is the top choice, second best is a MAPP gas torch, third is propane.

You need to get the bolt heads holding the shield hot enough (shoot for dull red) to burn off all the rust (oxides). Let them cool down (cold) and the bolts will spin out. Do the same with the sensor but make sure you have the right socket first.