Features: 1.Part Number: Xenon ballast bulb control unit replace part number is 7L7Z 13C170 A for reference. Please check the part number carefully before purchasing. 2.High Compatibility: Control unit is fit for MKZ 2010?2012, fit for Navigator 2007?2014, please check carefully to make sure it is compatible with your vehicle. 3.Promoting Visibility: Module controls and stabilizes lamp operating current, providing brighter and more stable light levels for improved night time driving visibility. 4.Durable Structure: Made of high strength metal structure to increase durability, wear resistant, sturdy and durable, not easy to damage and deformation. 5.Stable Performance: This control unit utilizes advanced technology and precision manufacturing to effectively control the lamp's operating current, providing long lasting performance. Specification: Item Type: Xenon Ballast Bulb Control Unit_x000D_ Material: Metal_x000D_ Part Number: 7L7Z 13C170 A_x000D_ Output Voltage: 42V_x000D_ Output Power: 35W_x000D_ Applicable Lamp Holder Type: D1S D3S_x000D_ Installation Mode: Direct replacement installation_x000D_ Fitment: Fit for MKZ 2010?2012, fit for Navigator 2007?2014 Note: Please double check the part number of your item, matching information is for reference only.