This Y‑shape coolant hose tee connector with OEM numbers 5Q0121087L and 1K0121087Q is a direct‑fit replacement part for VW, Audi and Skoda engine cooling systems. Made of PA66‑GF30 glass fiber reinforced nylon, it features 20 mm port outer diameter, excellent high‑temperature resistance, coolant corrosion resistance and anti‑aging performance. Equipped with retaining stop ring design to prevent rubber hose slipping and leakage, precision injection molding ensures stable dimension and reliable sealing. Factory direct supply, stock available for fast delivery, suitable for auto parts distributors, repair shops and importers. Please verify your original OE number before placing orders to confirm correct fitment, bulk order quotation and custom molding service are also available.