Many of you guys may not noticed it, but this is where I spotted my coolant is leaking slowly on the side of my radiator, by the driver side. Look on top of the radiator, most likely this is where coolant leak occur on the BMW X5. However I haven't fix my radiator leak yet, once it last me atleast nearly a month to refill.
but atleast I found where my radiator is leaking. Most likely when the engine is running hot after certain time, that's when coolant begins to leak more on top of the radiator where there's a small crack on the top side. I tried to glue it which worked perfectly but unfortunately when engine running at full HOT intensity, it melted the crack part open for coolant to leak.

Attached Images