Pressurized Coolant Reservoir & Coolant Level Sensor For 2008-2022 Peterbilt 389 & Kenworth W900

Heavy-duty pressurized coolant reservoir system engineered for Peterbilt 389 and Kenworth W900 trucks (2008–2022 models). Features an integrated coolant level sensor that monitors fluid levels in real time, helping prevent overheating and engine damage. Built to withstand high-pressure cooling systems and extreme operating conditions. Direct fit replacement ensures proper fitment and reliable performance. Maintains optimal coolant circulation and temperature regulation for long-haul and vocational applications. OEM-quality construction designed for durability and extended service life.