Universal Digital Wideband Air/Fuel Ratio AFR Gauge Kit - 2"(52mm) with LSU4.9 Sensor and Controller Box-Wideband UEGO AFR O2 Oxygen Sensor Controller Gauge

Complete kit, easy install, plenty of wire, A+. Helped me tune my car so it would pass California smog. Money well spent.

I installed this unit under my hot rod. Originally showing 14.8 to 14.9 did a drastic jet change, but no change in the reading. Also read the same at wide open throttle, idle, and even when the engine isn’t running then I unplugged the o2 sensor and still reading 14.8. not sure what I’m doing wrong but it’s easy insulation. Haven’t yet found customer tech support.Just goes to show you. Don’t buy Chinese garbage.

Was very pleased with it! Was very inexpensive compared to name brand units other than it having box to deal with!

Worked for 3 months just go with AEM and don’t be cheap learned the hard way and thought my tune was messed up. Whole time it was this china pos

For the price you can’t complain or compare it to units 2-4 times it price. Doesn’t seem to recover in real time after a lean reading. Also; It does not have a data logging output but I’m sure you could open it up and create an output with some type of isolation, I will probably try either an optic isolater or transistor based to avoid damaging the unit. *not advised and will void warranty

Totally worthless... it actually has a nice fit and finish goos looking quality BUT it is useless it responds so slowly it's not even good for keeping an eye on things.... I even tried using an actual bosch sensor no difference. Has a 2-3 second lag. And just jumps from one afr to the another....

is easy to install. Haven't started engine yet.

This was a bit challenging to use and seemed a bit sensitive but overallit worked.