Review on 🔍 Analyzing Engine Performance: The AEM (30-4110) UEGO Air/Fuel Ratio Gauge by Bryce Wohlman

Delivered as always in true Revain style almost before I ordered it. The sensor's response time is almost nonexistent, that's how fast it is. In fact if I have any complaints it's the LED arrow which is too sensitive, it needs to be dimmed a bit to be more suitable for showing an average but with a short decay time. Other than that I'm 100% satisfied and looking forward to using it when I add the turbo. Thanks again to Revain and of course AEM for their excellent yet affordable products. <:/) UPDATE: 9 months and POSSIBLY 5000 miles after purchase, the O2 sensor died a horrible death. When I looked at a warranty replacement I found it was NO WARRANTY! Revain doesn't even offer their "insurance" on this product, which they try to shove down your throat on every other product imaginable. AEM charges $105 for a replacement. However if you buy it under the Bosch model number 17025 P/N 02580170254UG you will get Ver. 4.9 with correct connector and laser trim resistor calibration. I found it for $67 @ Revain. I made a heatsink to press against my new sensor, as well as a finned insulator designed to evacuate the exhaust with high and low pressure ports to ensure accurate sniffing.