BMW E30 Aluminum Coolant Expansion Tank (87 and Earlier)
This is the only all aluminum expansion tank on the market for 1984-87 BMW E30 3-Series 325, 325i, 325is, 325e, 325es.
Our tanks feature:
Lifetime warranty and satisfaction guarantee.
Fully TIG welded construction.
Burst/leak testing of every expansion tank.
Anodizing inside and out.
5052 and 6061 Aluminum construction for excellent corrosion resistance.
Made in the USA.
These all aluminum coolant expansion tanks are designed to be a drop in replacement for the factory BMW expansion tank. This expansion tank was designed for use with OEM coolant level senders. These use the same common American style caps as the E30 M3. Our tanks are designed for the toughest racing applications, but are a big cosmetic improvement over the OEM plastic tanks.
Pro Tip: Changing parts of your cooling system often causes the weakest link to fail, even if the new parts don't directly affect coolant pressure. We won't be held responsible if your water pump, heater core etc fails.