When should the transmission fluid be changed for a BMW 3 Series?

[DelHenry]

BMW 3 Series requires transmission fluid replacement every 80,000 kilometers. If you need to change the transmission fluid for a BMW 3 Series, here are the replacement methods: 1. Gravity Drain: Loosen the oil pan bolt and allow the transmission fluid to drain out by gravity. 2. Machine Flush: Add new transmission fluid into the flushing machine, connect the machine to the transmission fluid circuit interface, and under hydraulic pressure, the new fluid will push out the old fluid. This method cleans the fluid circuit more thoroughly. 3. Oil Pan Removal: This is a root cleaning method that also allows cleaning the oil filter. However, due to the excessive labor required for the disassembly process, 4S shops generally do not perform this method.