Good luck on you new 3.0i! Don't forget the expansion tank as part of the cooling system replacement. While the patient is on the table, have the mechanic check 1) fan and clutch for wear, 2) the serpentine drive belts for wear, and 3) the various belt driven pulleys for worn bearings as well. Replace the transfer case fluid if it has been not been done previously - by this mileage the scanner has thrown a code.

You can easily DIY spark plugs, air filter, cabin filter, engine oil/filter change as needed.

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2021 X3 M40i Glacier Silver
2016 X5 xDrive 35i Mineral Silver

Gone but not forgotten
2017 X4 M40i Black Metallic
1985 325e Cosmos Blue
2006 330i Monaco Blue
2006 X5 Ti Ag
2000 528i Ti Ag
1986 535is Black (great ride)
1985 528e Polaris Silver (GTA in NYC)