Original BMW 2/3/4 Series Coolant Expansion Tank (2016–2021)

This BMW-branded Coolant Expansion Tank replaces the corresponding factory component on BMW 2/3/4 Series from 2016–2021. It stores expanding coolant and provides the system’s fill and recovery point. Applications include 230i, 330i, 340i, 430i, 440i, and M240i. BMW backs Original BMW Parts in the U.S. with a two-year, unlimited-mileage limited warranty.

Technical Details

• Manufacturer part number: 17-13-8-677-649
• Component: Coolant Expansion Tank
• Manufacturer: BMW
• Vehicle applications: BMW 2/3/4 Series
• Primary function: stores expanding coolant and provides the system’s fill and recovery point
• Production range: 2016–2021
• Listed models: 230i, 330i, 340i, 430i, 440i, and M240i

Fitment & Compatibility

Use the fitment table below to confirm the exact year, model, submodel, and application notes. Match the engine, hose or connection layout, cooling-system equipment, and production date. PMB Performance has more than 20 years of experience matching European vehicle parts; send us your VIN if you need help confirming fitment.