Coolant Expansion Tank

Product Details

Protect your modern BMW from catastrophic thermal overload with the Febi Bilstein coolant expansion tank. Late-model BMW cooling systems run at high operating temperatures and pressuring levels, putting immense stress on plastic components. As the factory reservoir ages through thermal cycling, structural fatigue sets in, creating invisible micro-fractures that lead to pressure loss and coolant leaks. Designed as a direct replacement for G30 5-Series, G11/G12 7-Series, and G14/G15/G16/F92 8-Series and M8 models, this Febi unit restores cooling system integrity without compromise. Molded from robust, heat-stabilized plastic, it maintains structural rigidity under extreme engine heat. Outfitted with a fresh, factory-style level sensor, it ensures your BMW's warning systems remain calibrated to safeguard your engine during daily driving or track use.

Key Features

• Engineered to match exact BMW OEM specifications for seamless installation on G-chassis models

• Molded from high-temperature polymer to handle demanding thermal stress and pressure loads

• Pre-installed coolant level sensor ensures proper integration with onboard electronics

• Restores proper system pressurization to prevent localized boiling and coolant loss

• Ideal proactive maintenance item for aging modern BMW cooling systems

Specifications

• Brand: Febi Bilstein

• Part Number: 188347

• Product Type: Coolant Expansion Tank

• Material: High-Strength Plastic

• Connector Count: 2-pin

• Included Components: Integrated coolant level sensor

• Excluded Components: Expansion tank cap (reuse original or purchase separately)

• Replaces BMW OE Numbers: 17 13 9 846 642, 17 13 9 884 859, 17 13 8 610 656, 17 13 9 487 210, 17 13 8 742 975

• Weight: 1.385 kg

Prop 65 Warning

Product Q&A

Lifetime Replacement

Fits These Cars