8K0121403Q Front Engine Coolant Reservoir Radiator Expansion Tank with Pressurized Cap Sensor for 2011-2016 AUDI A4 A5 Allroad Q5 Replaces# 8K0121403D Item Description ?Compatible with: For 2012-2016 Audi A4, For 2012-2016 Audi A4 Quattro, For 2012-2014 Audi A5, For 2012-2016 Audi A5 Quattro, For 2013-2016 Audi Allroad, For 2011-2016 Audi Q5. Please check the second main picture to confirm coolant reservoir whether compatible with your car. ?Function: The coolant tank contains coolant fluid that is discharged from the cooling system attached to the engine. Pressure builds up and released when the coolant is hot and expanding through the radiator and when the engine cools down, the excess fluid flows back into the radiator from the coolant tank of your vehicle. If you are experiencing leaks, low level of coolant and overheating engine then you may have a problem with your coolant reservoir tank. ?High-quality: The coolant reservoir expansion recovery tank with cap is made from high quality PP plastic materials can withstand excessive heat and vibration, light and durable. While this is not a genuine OEM part, it is a direct replacement and good value. ?OE#8K0121403Q. Replace OE# V10-4478, 8K0121403Q, 8K0121403T, 8K0121403D, 8K0121403G. Package Included: 1x coolant reservoir + 1x surge cap. (Notice: instruction is not included. Recommended you install under the guidance of professionals.) ?After-Sales Service: We offer 24 hours customer service and 1 year product service, If you are encounter product installation, product quality and other problems, please feel free to contact us. ? See more product details Payment We accept payment only through PAYPAL Shipping We ship products worldwide through standard express courier service, it will reach within 7 to 10 days to abroad buyers, we ship the product after recieved clear payment and give full information about shipment to the buyer Return We accept product return 25 days from delivery date but product should be in original condition.