Hope someone has the answer, no luck searcing for this topic in previous posts. I bought the recommended pre-cat O2 sensors for my 97 3.8.Upon inspection of the stock sensors I noticed that the plug was different. The stock plug is a 4 wire square configuration and the Bosch replacements (#15703) have a 4 wire flat configuration. Do I have the wrong sensor? or just the wrong plug configuration? Any information at all is welcome.
Thanks in advance, Chris

 

Stock one is a square. Take the sensor back and make sure they gave you the right one. 13444

 

The sensors are the same. The Bosch catalog is probably wrong. Take them back & get the right ones. Irecommend either Denso or AC Delco, had many issues with the Bosch ones.