How to Replace the Water Pump and Auxiliary Belt on Audi A3 1.2 TFSI

In this video I show how to replace the water pump and V-belt (auxiliary belt) on an Audi A3 2012 1.2 TFSI. A failing water pump or worn auxiliary belt can cause coolant leaks, overheating, squealing noises, or charging system issues. I demonstrate how to access the water pump, safely remove the auxiliary belt, replace the pump, and refit a new V-belt before refilling and bleeding the cooling system. This guide applies to Audi A3 models with the 1.2 TFSI petrol engine, typically 2010–2013, with similar engine layouts. WHAT’S COVERED: Symptoms of water pump failure Accessing the water pump on the 1.2 TFSI engine Removing the auxiliary (V) belt Replacing the water pump and seals Fitting the new V-belt correctly Refilling and bleeding the cooling system Final checks for leaks TOOLS & PARTS USED (): Replacement water pump New V-belt (auxiliary belt) Correct Audi/VW-spec coolant Socket set and Torx bits Torque wrench - Torque wrench small - Coolant drain pan Gloves - Rags - Torch - HEALTH & SAFETY: Allow the engine to cool fully before starting work. Relieve coolant system pressure carefully. Support the vehicle securely if raised. Avoid contact with coolant and moving components. Dispose of old coolant responsibly. Any work carried out is done entirely at your own risk. AFFILIATE & RESPONSIBILITY DISCLAIMER: Some links in this description may be Amazon affiliate links, meaning I may earn a small commission at no extra cost to you. Any maintenance or repairs you carry out are done at your own risk. I accept no responsibility for injury, overheating, engine damage, or incorrect installation. Always follow Audi manufacturer specifications and torque settings. ⸻ 🔖 Hashtags #audia3 #audia3tfsi #waterpump #vbelt #auxbelt #coolingsystem #maintenance #mechanic #diycarrepair