Wide band O2 sensors

You might want to try giving some of the Dyno companies a call, Dynojet uses wideband sensors on there dynos, i imagine that they would have replacement ones they sell or could at least point to to a vendor. I think they usually run a couple hundred bucks or more so that $70 bosch probably isnt right.

I have been looking for one of these sensors as well. I have found some through the dyno suppliers but they are asking around $600 for them. I found this info today on the web. It has Honda and NAPA part numbers and looks like it may be helpfull.


Greg

I have been using UEGO sensors for a few years now in both engine controls and instrumentation.
For engine controls we obtain our sensors directly from NTK. I am not sure if the sensors we have are the same as the ones used in your projects. The connector is different but looks the same otherwise. They must be similar as both are 5 wire NTK UEGO sensors. NTK does have different models with different calibration resistors. Different connectors are found on otherwise similar units.

For instrumentation we use the Horiba “Lambda Checker LD-700”. At about US$1500 (sensor included) it is accurate and reliable and saves the effort of having to make it yourself. The unit operates on 12V source and supplies 0 to 5 volts output = Lambda. See for info.

A company called ECM in California supplies a similar product. They are extremely familiar with the NTK UEGO sensors but don’t seem so keen to assist do-it-yourselfers.