Heating and Cooling› Overflow Tanks and Catch Cans

Moroso

Moroso 06-13 BMW 3-Series E90/E91/E92/E93 (Excl M Models) Coolant Expansion Tank

$638.99

SKU: M00R 63851

In Stock
In Stock
Ships by Jun 9
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

This Moroso Aluminum Coolant Expansion Tank provides a durable upgrade over the failure-prone factory plastic tanks in BMW 1-Series, 3-Series, X1, and Z4 models (specific years and engines apply, excluding N55 engines). Made from fabricated aluminum with billet aluminum components, it ensures enhanced strength and a precise fit. The tank includes a 2-bar racing radiator cap and features a sight glass for easy fluid level checks. It's designed for direct bolt-in replacement without modifying factory hoses.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMoroso
Part NumberM00R 63851

Videos

E46 M3 MISHIMOTO AND MOROSO INSTALL

E46 M3 MISHIMOTO AND MOROSO INSTALL

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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