BMW 325i E90 Expansion Tank | Coolant Bottle Replacement

Coolant Expansion Tank (Radiator Overflow Bottle) – BMW 325i E90 / 335i E92

Reliable Cooling System Performance.

Maintain optimal engine temperature and cooling efficiency with this high-quality coolant expansion tank, designed for BMW E90 and E92 models. This essential component regulates coolant levels and pressure, helping prevent overheating and ensuring reliable engine operation.

✔ Key Features & Benefits

• Direct Replacement Fit
  Designed for BMW E90 and E92 models for accurate fitment
• Efficient Coolant Management
  Maintains proper coolant levels and system pressure
• Durable Construction
  Built to withstand heat and pressure in demanding conditions
• Cost-Effective Solution
  Economical aftermarket replacement without compromising performance
• Improves Engine Reliability
  Helps prevent coolant loss and overheating

✔ Compatibility

• BMW 325i E90
  • Model Year: From 2007
  • Engine: N52B30
• BMW 335i E92 (fitment dependent – verify before purchase)

(Please confirm compatibility with your specific vehicle.)

✔ Important Fitment Note

• Radiator cap is NOT included
• Reuse your existing cap or replace it for optimal performance

✔ Ideal For

• Replacing cracked or leaking expansion tanks
• Cooling system maintenance
• Preventing overheating and coolant loss

✔ Applications

• Engine cooling system
• Coolant expansion and overflow management

📦 What’s in the Box

• 1 × Coolant Expansion Tank

⚠️ Important Notice

Before purchasing, please ensure compatibility with your vehicle.

• Verify model, engine code (N52B30), and specifications
• Incorrect installation may cause cooling system issues
• Professional installation is strongly recommended

Returns & Exchanges:

• Items must be unused and in original packaging
• Proof of compatibility verification may be required
• Courier fees may apply for incorrect orders

💬 Need Assistance?

Contact our support team with your vehicle details—we’ll help you confirm fitment before ordering.