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Headlight bulbs except HID low-beam bulb models can be replaced without removing the headlight housing, although if space is limited or hands are too large, the housing should be removed first. For left headlight bulb replacement, the air filter housing must be removed. On 2011 and later models, the dust cap should be turned counterclockwise to remove it. The electrical connector from the headlight bulb must be disconnected by grasping it firmly and pulling it out of the bulb socket terminal, ensuring enough force is applied to release the locking tab. To remove the headlight bulb, it should be turned counterclockwise about 30 degrees, as the bulb and socket are a single assembly with no further disassembly possible; the new bulb will come with its own socket. Installation follows the reverse order of removal. High Intensity Discharge (HID) low-beam bulb models produce three times the light of standard halogen bulbs, consume less energy, and have a lifespan ten times longer. These bulbs operate using an alternating current to ignite xenon gas within a sealed bulb, functioning similarly to vapor-filled streetlights. Instead of a filament, an arc is created between two electrodes to ignite the gas. A ballast module converts battery voltage from 12 volts DC to 800 volts AC, and the HID bulb requires about 10-15 seconds to warm up for normal operation. The igniter, part of the HID bulb, controls the voltage to the electrodes, stepping up the 800 volts AC input to approximately 25,000 volts for ignition and then reducing it to about 85 volts for continued operation.