Where is the Jetta's drain plug located?

[DanielDella]

The Jetta's drain plug is located at the lower left edge of the differential housing, which is a 17mm hex socket screw. The oil filler port is positioned at the middle right side of the differential housing, also a 17mm hex socket screw. Fuel tank maintenance: Mainly conducted during the vehicle's primary maintenance, it involves draining accumulated water and sediment from the fuel tank, and checking for oil leaks at pipe joints and switches. For fuel tank caps equipped with air valves and steam valves, ensure their vent holes are unobstructed. The filler neck's filter screen should remain intact to prevent impurities from entering the tank during refueling and clogging the fuel lines. Precautions: Vehicle fuel tanks should generally be cleaned every three months. Excessive sediment in the tank can lead to large amounts of contaminants entering the fuel lines, accelerating filter clogging and wear on precision components, affecting engine performance. Regular removal of tank sediment and maintaining internal cleanliness are essential.