Engine Radiator Overflow Expansion Tank Bottle With Cap For Focus MK3 09-12 C-Max S40 V50 C30 C70 MAZDA3 OEM NO.: 5M5H8K218AA+3M5H8100AD Maximum operating temperature: 105℃ or lower Material: Plastic Compatibility: Focus MK3 (2009–2012), C-Max, S40, V50, C30, C70, Mazda3 Installation: No drilling or modifications required Design: Ergonomic and sleek The Engine Radiator Overflow Expansion Tank Bottle with Cap is designed to support proper cooling system function by storing excess coolant and maintaining pressure stability.Constructed from plastic, it is built to endure regular driving s and thermal stress.This expansion tank fits multiple vehicle models, integration with the engine compartment.Its design allows for straightforward installation without the need for additional modifications.The unit helps prevent overheating by managing coolant levels effectively, supporting consistent engine in various driving environments. Compatibility Statement: This is not an manufacturer part./model references are used for fitment guidance.