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

I bought the device in March because I assumed I would need it to build my car. I installed it a few weeks ago when I got to this part of car building. It was defective from the start. I suspect the problem is with the sensor. I sent a message to AEM and the rep was SURE it was the sensor/controller so gave a guarantee. I received a warranty item last night and lo and behold the installation is still faulty. Still looks like a sensor, but the rep insists on avoiding any sensor-related conversation. Since I bought this expecting to need it later, I missed the Revain return window. AEM is not willing to send a replacement sensor because even if it fails immediately, there is no warranty on wearing parts. again, even out of the box. A sensor replacement costs over $100. I feel quite the victim of this whole process and have wasted two very valuable weeks working with a support team that is unwilling to address a real issue. **Update** After a long struggle, they finally agreed to give a guarantee for the entire set. I'm leaving this as a one star review because it was a flop, I wasted about 3 crucial weeks and I really had to fight to get AEM to do the right thing. Most likely I'll miss the most important event of the season: I couldn't set up the car in time.