Depending on your skills with a soldering gun buying a OEM replacement might not be worth it. 02 sensors are not a cheap part. If you understand wiring diagrams I'll be more than happy to send you those. If not, mixing the volt wire and the heating element lead would be a big headache. OEM is the easiest and from my small experience with a 3400 a plug and go sensor might be best. This guy looks like a huge pain to get to.