BOXI Expansion Tank - Cooling Reservoir for BMW E36

E36

$25.99

Buy on Amazon

Key Features

Fits BMW E36 3 Series applications listed
Replacement expansion tank for factory cooling system
Cap not included
Coolant level sensor not included
Good choice for cracked or leaking original tank
Best paired with a full E36 cooling refresh

Product Details

Category: Expansion Tanks
ASIN: B087JB6X6S

Check if it fits your BMW

BOXI Expansion Tank - Cooling Reservoir for BMW E36 — Overview

This is a replacement coolant expansion tank for E36 cars, sold without the cap or level sensor. It fits the usual E36 3 Series applications listed for 318i, 323i, 325i, and 328i, and it covers the basic job if your original tank is cracked, yellowed, or seeping at the seams. On these cars, the expansion tank is a known weak point once the plastic gets old, so replacing it before it splits is just normal E36 ownership.

I would pick this if you need a budget stock-style tank and your cap and sensor are still good. If your cooling system is all original, this is one of those jobs that makes more sense as part of a bigger refresh with hoses, thermostat, and radiator inspection. Just keep in mind this listing is tank only, so do not start the job assuming the cap or coolant level sensor is in the box.