The Engine Control Module (ECM), also known as the ECU, is essential for managing engine performance in Audi Allroad Quattro models from 2003 and 2004. Designed for optimal functionality, this OEM part (4D0997561SX) communicates with various sensors to regulate fuel injection, ignition timing, and emission controls, ensuring your engine runs efficiently. If you're experiencing issues like stalling, poor fuel economy, or engine misfires, a replacement ECM may resolve these malfunctions due to wear or damage. This genuine, factory-original part is sourced from salvage vehicles, ensuring authenticity and reliability. Programming is required upon installation for perfect vehicle integration. Compatible engines include the 4.2L V8, enhancing performance while upholding original specifications.
