3.3TT Bms trans cooler line leak

[Omega]

My lines seem to leak oil out of the pin hole, idk why. Help is appreciated.

 

[Hawk853]

That’s an AN fitting. The nut has no sealing surfaces, it just applies the clamping force to the sealing surfaces.

If tightening doesn’t fix the issue I’d disassemble, look for a defect if any and reassemble.