The Volvo part number 30680446 is primarily described as an Engine Air Intake Hose, also referred to as a Mass Air Intake Tube Pipe Hose, Inlet Pipe, or Fresh Air Pipe. This hose connects the air mass sensor (or air mass meter) to the turbo inlet. Its function is to carry filtered air to the vehicle's engine. Over time, these hoses can become brittle and crack, leading to vacuum leaks, check engine lights, and reduced engine performance. It's a genuine Volvo part and is often a replacement for part number 9475265. This part is typically found on various Volvo models with 5-cylinder turbo engines (e.g., B5254T2, B5254T4, B5244T3, B5244T4/T5 engine codes) from around 2001 to 2007, including: Volvo S60 Volvo S80 Volvo V70 Volvo XC70 Volvo XC90