Moroso 01-06 BMW E46 M3 Coolant Expansion Tank - Direct Bolt-In Replacement

Moroso 01-06 BMW E46 M3 Coolant Expansion Tank - Direct Bolt-In Replacement

Marsoni

M251S

$217.00

Get it in 3 business days with 1 day shipping. Friday, May 29

Moroso 01-06 BMW E46 M3 Coolant Expansion Tank - Direct Bolt-In ReplacementSKU: 63793 UPC: 84663637933 Moroso 01 06 BMW E46 M3 Coolant Expansion Tank Direct Bolt In Replacement This Moroso coolant expansion tank serves as a direct replacement for the factory unit on 2001 2006 BMW E46 M3 models. The OEM plastic tank often cracks under heat and pressure leading to leaks and overheating. Moroso's design uses stronger materials with extra capacity to maintain consistent coolant levels during track or street driving. Key Features

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Easy to install took less than 10 minutes with watching Youtube. Fits perfectly but becareful because the wiper blade arm fits both ways. However as it fits both ways when you install it and place the main arm back down on the Highlander pull the replacement arm to check it doesn't come lose. If it is coming out and lose then switch the direction and install it again with the same directions and check it again. Now it should not slip out when you pull it. I had this issue when installing it but I quickly figured the issue out. After, I tested out cleaning the rear window and all was good.

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Reviewed in the United States on April 24, 2026