For 217104GN0A Coolant Reservoir Expansion Tank Infiniti Q50 2014-2015 3.5L 3.7L - Aluminum Radiator Overflow Tank with Cap Protect your Infiniti Q50's engine with this premium aluminum coolant reservoir tank. Designed as a direct replacement for the factory plastic tank, this upgraded aluminum version resists cracking and deterioration common with OEM parts. Crafted from high-strength, heat-resistant, and corrosion-resistant aluminum, it keeps your engine coolant at a safe temperature and prevents costly overheating damage. Includes cap for a complete installation. Features: .