For BMW 640i GT 2018 – 2019. for BMW 740e 2017 – 2019. for BMW 530e 2018 – 2020. for BMW 530i 2017 – 2020. for BMW 540i 2017 – 2020. When a coolant expansion tank has any issues it can lead to issues that: Constantly low on coolant, coolant leaks, engine overheating.
