Swap Out Your Old Parts With This Engine Coolant Reservoir Tank For Mini Cooper 2002 Through 2008 Oe 603 331 Replacement Expansion Tank To Keep Things Running Smooth

Direct Fit Coolant Expansion Tank Mini Cooper
✔️ PA66+GF30 Plastic Cooling 603-331 OE Spec White Reservoir

This single replacement coolant expansion tank swaps out fried units on twenty two through twenty eight Mini Coopers to keep your engine temp steady. It bolts straight into the factory hose layout and holds extra antifreeze so your radiator never runs dry during heavy gridlock or towing loads.

✅ Built from tough PA66 additive compound that absorbs heat soak and road vibration without fracturing.
✅ Exact match for OE identifiers nineteen seventeen one three seven five two nine two seven three and ten zero one zero zero five one zero five four nine.
✅ Clear sight glass lets you catch low fluid drops fast without wrestling off a scalding cap.
✅ Channels excess liquid safely back into the main loop once the metal settles down.

💡 How does replacing a failed coolant expansion tank restore proper engine temperature control?

Swapping out a cracked unit gets your cooling loop sealed right away. Here is why this handy upgrade matters:

- Heavy duty thermoplastic shrugs off repeated heat cycles while keeping antifreeze levels steady inside the loop.

- Direct bolt pattern matches original bracket holes so mechanics skip extra cutting or bending metal tabs.

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