Expansion Coolant Reservoir Tank for BMW F30

F30

$35.99

Buy on Amazon

Key Features

Stock-style coolant expansion reservoir for BMW F30
Replaces cracked, leaking, or discolored original tank
Good fit for daily-driver cooling system refresh
Verify by VIN before ordering - F30 fitment varies
Inspect cap and hoses while the tank is out
Bleed cooling system properly after installation

Product Details

Category: Expansion Tanks
ASIN: B0D69P4DWN

Check if it fits your BMW

Expansion Coolant Reservoir Tank for BMW F30 — Overview

This is a replacement coolant expansion reservoir tank for F30 3 Series cars. It handles coolant overflow and return as the system heats up and cools down, and it is the piece that usually starts showing age with hairline cracks, seam leaks, or a level sensor warning that keeps coming back. If your current tank is yellowed, sweating coolant, or leaving crust around the cap and hose necks, this is the part you replace before it strands you.

For an F30, this is the right buy when you need a stock-style replacement and do not care about dress-up parts or aluminum conversions. I would go this route on a daily driver or a straightforward cooling system refresh, especially if you are already doing hoses or a cap. Just verify the part number against your specific engine and production date, because BMW fitment can split even within the same chassis.