Coolant Expansion Tank

Product Details

Prevent catastrophic track-day or daily-driving overheating with this OEM-spec replacement Coolant Expansion Tank by Febi Bilstein. High-performance driving subjects your BMW's cooling system to intense thermal loads, and the factory plastic tank is notorious for fatiguing, yellowing, and cracking over years of heat cycles. This replacement tank delivers factory-fit accuracy and reliable pressure retention under demanding conditions. Utilizing robust composite construction and an integrated level sensor, it drops directly into the stock location—making it an essential preventative maintenance item or replacement for any enthusiast restoring their cooling system's integrity.

Key Features

• Engineered to OE specifications for precise drop-in fitment

• Essential preventative maintenance for aging chassis cooling systems

• High-strength composite construction designed to endure thermal stress and system pressure

• Pre-installed coolant level sensor maintains full factory dashboard warning functionality

• Restores reliable cooling performance for daily driving and high-load conditions

Specifications

• Brand: Febi Bilstein

• Febi Part Number: 188339

• Cross-Reference BMW OE Numbers: 17138677649, 17138617044

• Material: Molded Plastic

• Connector Count: 2-pin connector

• Includes: Expansion tank with integrated level sensor (uses factory-style cap, cap not included)

Prop 65 Warning

Product Q&A

Lifetime Replacement

Fits These Cars