OE 03H121133 Water Through Flange Coolant Flange Pipe Fitting for 3.6L V6 Engine Direct Bolt-On Replacement

This coolant water through flange pipe fitting with OE number 03H121133 is a precision replacement part designed for the 3.6L V6 engine of Volkswagen, Audi and Skoda vehicles. It is manufactured strictly following OEM dimensions and specifications, ensuring perfect alignment and smooth connection for the engine cooling system.

This flange pipe acts as a critical coolant passage connector, guiding circulating coolant between the engine block, thermostat and radiator. It maintains stable coolant flow to keep the engine operating within the proper temperature range. Aging or cracked flange often leads to coolant leaks, abnormal engine temperature and overheating risks, which may cause severe engine damage if ignored.

Made of high-temperature resistant reinforced engineering plastic, this fitting features outstanding anti-aging, anti-cracking and pressure-resistant performance. It can reliably endure the harsh high-heat and vibration environment inside the engine bay for long-term service. Every unit undergoes leakage and pressure testing before delivery to guarantee stable sealing performance.

It is a direct bolt-on replacement with no cutting or modification required, greatly reducing labor time for repair shops. Widely used for routine maintenance of VAG 3.6L models, it is a reliable and cost-effective cooling component for auto wholesalers, repair workshops and aftermarket retailers.