I wrote a PARTIAL Cooling Overhaul at 110K miles.
At 180K miles, you need a complete overhaul, which takes about 4h.
You have a classic Coolant Reservoir crack.
Here is the PARTIAL list:
https://xoutpost.com/bmw-sav-forums/...16k-miles.html
At your mileage of 180K, add Fan Clutch (Sachs only) and rad (Nissens is fine).
Re parts: brand-name matters, many mechanics simply get parts from PepBoys etc. a big No bc of many Chinese parts.
Best is to hold off, buy the quality parts (made in Germany etc.) and get the proper mechanic to do it.
My cousin owns a BMW indy shop in L.A. area if you are close by.
Don't drive the car overheated!!!
Southbay Independent
18020 S.Vermont
Gardena, CA
Phone: 310-532-3145
https://www.e46fanatics.com/threads/...th-bay.377044/