LSU 4.9 Lambda WideBand O2 Oxygen Sensor | for AEM 30-4110 30-0300 30-0310 - X Series AFR Inline Controller - UEGO A/F Ratio Wideband 02 Gauge | Replace# 17025, 0258017025

Seems pretty accurate and quality is decent. Has been installed ifor use with my aem x series. No codes and sensor reads as it should. Installation is straight forwards. Great value and price.

Works like it should

Junk. Within 29 minutes of install the sensor went. It’s reading super erratic, and causing so many issues. Just stick to paying the extra money for the Holley one.

Works perfectly

Great sensor. Had an issue after quite some time and they were quick to respond and fixed things very fast. I will buy from these guys from now on. Plenty of wire length and thr fitment was excellent. Amazing customer service 👏

Why did you pick this product vs others?:LSU 4.9 is e85 compatible a upgrade from the LSU4.2

It's A wide band sensor. It fits how it should, it seems to be quite accurate as it is hooked up to an AEM gauge and my AFR readings are what I would expect them to be. The overall quality of the sensor is very high, the connector fit perfectly into my AEM wideband connector and it's been on there for some time now and is still doing its job. Phenomenally. As far as installation of a wideband sensor, if you need to retain your second O2 sensor, you will need to buy an additional bung drill the whole weld the bung, and then install the O2 sensor like you would any other sensor. And as long as it's not too far behind your second O2 sensor, your readings should be pretty good. Ideally you'd want The sensor to be plumbed in near your upstream O2 sensor but I have tti long tubes and my upstream sensor is not in my merge collector which seems kind of like a mishap on their end, but I digress. It's a great sensor. It does its job. It seems to be very accurate and it's a very good price. 10 out of 10 would recommend

Wanted to wait some time before reviewing, been 6 months and still running good.