EWK Heater Hose Quick Disconnect Coupler for Audi VW A3 TT Beetle Golf GTI Jetta Passat Eos 1. OEM #: 3B0122291B 2. Application: BMW E81/E82/E87/E88. Please check compatibility. 3. This plastic coupler fits on many cooling hoses on VW/Audi applications, and its commonly broken when too much pressure is placed on it. There is no need to replace the entire expensive hose, you can simply replace the end with this piece.