Coolant Flush Interval

[rellascout]

I can't seem to find a straight answer. From searches I am seeing anywhere from 30,000 or 2 years to 50,000 5 years. It does not show up in the timed maintaince system. Last time I was at the dealer the said 4 years or 30,000. What have other long term owners done? Thoughts?

Thanks in advance.

[AlmondJayRoM3]

Originally Posted by rellascout

I can't seem to find a straight answer. From searches I am seeing anywhere from 30,000 or 2 years to 50,000 5 years. It does not show up in the timed maintaince system. Last time I was at the dealer the said 4 years or 30,000. What have other long term owners done? Thoughts?

Thanks in advance.

It’s lifetime but probably not too good to let it go past 5 years. Personally I did it at 4 years then every other year from then. Easy for me because I have an air compressor and use the scwaben vacuum filler.

[gerri]

The New Tis BMW says that for vehicles after 03/03 (including M) with CBS the change is not necessary.

[boba7523]

Wanted to bump this up after seeing the above TiS. Is it still recommended not to flush the coolant for the lifetime of the car?