First disassemble the workbench.
1. After removing it, remove the instrument assembly.
2. After removing the instrument assembly, you can see the heater and remove the screws of the heater.
3. Then remove the screws of the heater, and then remove the water pipe connected to the heater water tank.
4. Finally, after removing the water pipe connected to the heater water tank, just take out the heater water tank.
The BMW 3 Series is a new generation sedan product of the BMW Group, with a body weight of 1,465 kg, an in-line 4-cylinder gasoline engine, and vehicle dimensions of 4.734 meters, 1.811 meters, and 1.455 meters.