Audi / Porsche Coolant Reservoir / Tank / Bottle 8K0121403T

This OEM coolant reservoir, also known as an expansion tank or coolant bottle, is crafted to fit a range of high-performance Audi and Porsche models. Designed for optimal integration in your vehicle’s cooling system, this part serves to maintain appropriate coolant levels and ensure efficient thermal management. It is compatible with various Audi models including A4, A5, Q5, and allroad from 2013 to 2017, as well as the 2017-2018 Porsche Macan. Key OEM part numbers include 8K0121403T, 8K0121403Q, and alternative designations ensure comprehensive applicability. Replace your worn or malfunctioning coolant reservoir to prevent overheating and coolant loss—vital for engine health and performance.