I have an '05 Elantra and I need to replace the 02 Sensor, B1S1, due to faults P0030 and P2237. I know what it looks like and where it is. This is not my problem. My problem is that I search online and I find websites that list different sensors with different connectors, attached and not, as replacements for mine. It should be noted that I have not yet been able to disconnect mine to get a good look at the connector. If I use Autozone as a reference, then I can choose between Bosch p/n's 13565 and 15733. If I go to Thepartsbin.com, they have them both plus a few others. Which one should I get? The 13565, the 15733, or a different one?

 

Buy neither of them,,,, you need to visit the dealer and buy the factory part, which I will venture yours has a wide "D" shape snap release connector with 5 or 6 wire in it.... it is a special style sensor, not a 2 wire feed with 2 more for heater as seen in your part numbers posted..

 

I took a look at the connector yesterday. It's either a Denso 234-5430 or a Walker 250-25012, but I'm thinking it's the Denso model because it has four wires and mine has four wires while the Walker has five.