28474-89904 28474-89915 Compatible with Nissan For Pathfinder For Navara D2S D2R Xenon HID Headlight Ballast Control Unit Module EC 28474-8991A 28474-8992A Material : made of aluminium alloy material, not easy to deform, strong and durable. exquisite workmanship, stable performance , have a long service time. The HID ballast helps start the lamp and it allows electricity to flow through the entire bulb, which keeps the lights on. Its another important function is to control the electric current flowing through the bulb. Direct Replacement - A direct replacement for your existing parts. Plug and play, no need to programme or code your car. Please make sure the OE number matches the part you are replacing, if you are not sure,please feel free to contact us at any time .