Overflow Bottle

Overflow bottle, also known as coolant expansion tanks, help regulate pressure and coolant levels by capturing excess fluid from the radiator during engine operation. Our aftermarket overflow bottle are manufactured to OEM specifications for accurate fitment, leak resistance, and durable construction. Whether you're replacing a cracked or discoloured tank, Sterling Parts offers high-quality replacements that restore proper cooling system function and help prevent overheating. Built to handle temperature fluctuations and engine bay conditions for long-term reliability.