Review on 🚗 ENA Ignition Control: Audi S4 S6 2.2L L5 Replacement (ICM ICU 4A0905351A 0227100209) by Daniel Jackson

A 2001 Audi A6 2.7T suddenly runs very rough with little power. OBD-II testing showed code P0304 (cylinder #4 misfire). Spark plugs and coil packs have all been checked well. I replaced the power output stages (aka ignition modules) on top of the air filter housing and changed the OBD-II code to P0301 (Cylinder #1 Misfire), which indicates the ignition modules were the cause of the problem. Ordered them every Thursday night for $30 and received them Tuesday morning in Washington. Interchangeable replacement and works like a charm. I recommend getting one, even if yours isn't out of service yet, to have on hand.