: mysterious coolant leak in my 2006 bmw 750

06-25-2012, 01:01 PM
So over the past two years Ive had to add coolant about 3 times... Its usually half a gallon low, but no signs of leakage on the ground etc, no smell, no anything. im getting a bit concerned as to why it keeps doing this. any common coolant system issues with the e66 750 cars?

06-25-2012, 01:11 PM
Half a gallon? Your warning light for low coolant should come on way before you are down to half a gallon. Ive topped my own with half a quart in the past 2 years. Same year car as yours. I also have not found any leaks. Nothing seems to be coming out of my exhaust either.

06-25-2012, 01:31 PM
I had a 2006 E65 and I did add more than a quart once in two years. However I drove 6000 miles a year. Maybe yours is normal. I got a message to add coolant. I assume you got that 3 times.

07-07-2012, 07:23 AM
yeah i drive about 40k a year, but I didnt know these things would just consume coolant?