The Audi A4 2.0 TDI models equipped with the AUM and AUQ engines feature reliable and efficient turbocharged 2.0-liter inline-4 diesel powerplants from the Volkswagen Group’s EA188 family. These engines utilize common-rail direct injection and turbocharging to deliver strong torque, excellent fuel economy, and smooth performance. Widely used in Audi A4 models from the early to mid-2000s, the AUM and AUQ engines differ slightly in tuning and emissions compliance, offering drivers a balance of power and efficiency suitable for daily driving and longer journeys.

Key Features:

• 2.0L inline-4 turbocharged diesel engines (AUM, AUQ)

• Common-rail direct fuel injection system

• Strong torque output with smooth power delivery

• Excellent fuel efficiency and reliability

• Used in Audi A4 models mainly in early to mid-2000s

• Part of Volkswagen Group’s EA188 engine family