Visible Coolant Monitoring: The translucent plastic housing allows users to visually check the fluid level without removing the cap, simplifying maintenance checks. Seal Seating Cap: The tank cap uses a multi-thread sealing design to securely seal the tank and help maintain system pressure, supporting seal longevity under temperature fluctuations. Engineered Plastic Structure: Constructed from lightweight plastic with reinforced design, the tank accommodates pressure changes and temperature fluctuations during normal. Vehicle Compatibility: This coolant tank fits models from 2012 to 2020 and is compatible with OE numbers AB398K089AA, AB398K218AA, BE8Z8100A, UK0115350, 3M5H8100AD, LR000243, 5193938, 1301104, Z601-15-205A, U20115351, and LF50-12-205A. Function: Replaces coolant expansion tanks that have developed cracks or leaks due to thermal cycling. Installation: Fits existing mounting points without modification; professional installation is recommended for proper sealing and fit. Specifications: Product Name: Engine Coolant Radiator Expansion Tank With Cap Material: Plastic Color: As Shown Number of Pins: 2 Pins Part Numbers: AB398K089AA, AB398K218AA, BE8Z8100A, UK0115350, U20115351, LR000243, 5193938, 1301104, LF50-12-205A, Z601-15-205A, 3M5H8100AD Fitment: Compatible with 2012–2020 models Package Includes: 1 x Engine Coolant Recovery Radiator Expansion Tank With Cap This is a non- replacement.Any reference to brand names or models is strictly for compatibility purposes.