BMW E46 Expansion Tank | Radiator Coolant Reservoir Replacement

Coolant Expansion Tank / Radiator Overflow Bottle
Compatible with BMW E46

Maintain your vehicle’s cooling system efficiency with this high-quality coolant expansion tank, designed specifically for BMW E46 models. This component ensures proper coolant storage and pressure regulation, helping to prevent overheating and maintain optimal engine performance.

🚗 Compatibility

• BMW E46 (3 Series)

🔧 Key Features

• OEM-Style Replacement – Designed to match original specifications
• Durable Construction – Built for long-lasting performance
• Leak-Resistant Design – Ensures reliable operation
• Efficient Cooling Support – Helps maintain proper coolant levels and pressure
• Direct Fit Installation – Easy replacement with correct mounting points

⚙️ Important Note

• Radiator cap is NOT included
• You must reuse your existing cap
• It is recommended to replace the radiator cap when installing a new tank

📦 What’s in the Box

• 1 × Coolant Expansion Tank
  (Cap not included)

⚠️ Important Compatibility Notice

Before purchasing, please ensure:

• The expansion tank matches your vehicle model and engine variant
• The hose connections and mounting points match your existing unit
• The OEM part number corresponds with your vehicle

📌 Disclaimer – Please Read Before Purchasing

• This product is intended for specific BMW models only
• Incorrect installation or incompatibility may result in:
  • Coolant leaks
  • Overheating issues
  • Engine damage
• Returns or exchanges:
  • Accepted only if unused and in original packaging
  • Must include proof of compatibility verification
  • Courier fees may apply
• Installation by a qualified mechanic is strongly recommended
• The seller is not liable for damages resulting from improper installation or incompatible use

💡 Need Assistance?

Contact our customer service with your:

• Vehicle details (model, year, engine)
• VIN or part number

We’ll help confirm compatibility before purchase.