Back in 2007, EA888 engines first appeared in the Audi A3 1.8 TFSI (this one is a BYT). Their first generation featured a single narrowband lambda sensor in the exhaust, Bosch Motronic MED17.5 ECU management and incredible performance gains with tuning. Strangely enough their OEM calibration included extremely lean Air-Fuel Ratio settings. Perhaps it was