LM2 replacement sensor?

The O2 sensor for my LM2 has given up the ghost. What are y'all using for a replacement?

Thanks, Justin

I found this years ago and use it as a reference.

They call for a 4.9 now. Compatible with the 4.2 except for the plug if I'm reading it correctly.

https://www.innovatemotorsports.com/xcart/bosch-lsu-4-9-o-sensor-p-n-3888.html

Kevin

If you switch to the 4.9 don't forget to change it in the setup.

What's the advantage of the 4.9 sensor?

To make a long story short, it's better....

https://www.ecotrons.com/accurate_lambda_meter/bosch_lsu_49_is_superior_to_lsu_42_sensors/

Uses current instead of air, for reference. Much past that I am lost....

Does that eliminate the free air calibration?

Kevin

It seemed to on mine. Been using it all summer on Methanol and its 20.9 when I first start it up.