12 There was a sudden sound of water in the exhaust pipe of Tiguan. How could there be water in it?

Hello, according to your description, the sudden sound of the exhaust pipe is not necessarily underwater sound. Generally, the muffler of exhaust pipe has drainage holes to prevent the exhaust pipe and muffler from rusting and corrosion after long-term water vapor forms water droplets. There won't be much water except for wading in the car and washing the car and raining, and the exhaust pipe is flooded. In the morning, there was a certain amount of water droplets when the cold car started. Suddenly, it was estimated that the engine was faulty and needed maintenance, such as the oxygen sensor, air flow meter, throttle valve and fuel nozzle oil circuit was dirty. Abnormal sound caused by unstable oil pressure, poor ignition of spark plug and ignition coil. , need special diagnostic computer equipment to detect, and the actual detection shall prevail. I hope my answer can help you, and I wish you a happy life!