LSU 4.9 Lambda Wideband O2 Oxygen Sensor Replacement - Replaces 17025, 0258017025 - Compatible with AEM 30-4110, 30-0300, 30-0310 - X Series AFR Inline Controller - UEGO Air and Fuel Ratio Wideband Review

Worked mostly during the day to tune my innovative LC-2. The only way I can get it to work now is through outside calibration and you have to do this every time you want to use/run it. After that, the sensor does not heat up and does not work. Waste of time and money, very annoying and pushes my project even further.

Good quality. Fast delivery. As mentioned, it fits my AEM AFR O2 sensor harness snugly and snugly and snaps into place with a good latch. Whether an anti-seize agent has been added to threads. Well packed. Bought as a replacement and not used yet. It has a lifetime guarantee, there's no arguing that. I'm glad I bought it, the price is very reasonable. Thank you

To connect it to the connector (if you have the AEM 30-0300 kit) you MUST remove the plastic tab in the connector where the pins are. Once that is done, attach the O2 sensor and then connect the connector. Switch on the engine and you're back in business. I can't complain if this sensor is half the price of the Bosch 17025.

Bought 2 years ago and worked fine for a few months. It went badly and the company kept their guarantee and sent me a new one. This new sensor lasted a few more months before I damaged the wiring harness and sold the car. Today I bought a second one because the original sensor has worn out due to the cold. These sensors are extremely sensitive and the original sensors that come with broadband sensors will fail over time. This sensor worked just as well and won't hurt your wallet if it fails…

This sensor works well but technically it is not a DIRECT replacement for the broadband AEM 30-0300. Inside the connector is a small plastic notch that needs to be broken open in order for the connector to be inserted. It also only displays a resolution of 0.1 AFR instead of 0.01 AFR like the meter that came with my meter. Not sure why that is, but AEM charges $120 for their "Bosch LSU 4.9 sensor" and my setup software only picked up a 0.1 resolution anyway, it just sucks, a dead one Having…

Description says it fits 30-4110 UEGO sensors. That is not true. The connector has a plastic part inside that prevents it from connecting to the UEGO wiring harness. All is not lost, however, as the plastic part can be cut off and then connect normally. At the same time, after installing and connecting the sensor, he does nothing, but constantly reads 14.5-14.7. I've never seen it go out of that range, even under engine braking when the gauge should be reading full lean (---). I would really…