Is your Subaru's coolant reservoir leaking or cracked? This genuine Subaru reserve tank assembly (part #45150AG00) is the exact OEM replacement you need. It's designed specifically for certain Legacy models, including the B4 4-door sedan and 5-door wagon from approximately 2003 to 2007. Compatible with chassis codes like BL5, BL9, BLE, BP5, BP9, BPE, and BPH. Important: Always double-check your vehicle's exact year, model, and trim before ordering, as fit can vary. This is the real deal from Subaru, so you get perfect fitment and reliable performance. The reserve tank (or overflow tank) is a crucial part of your cooling system - it holds excess coolant and allows for expansion as the engine heats up. A faulty tank can lead to coolant loss and overheating. Installing the correct OEM part ensures your cooling system works as designed. If you're doing your own maintenance or having a shop replace it, this genuine part gives you peace of mind.
