Sylvania 9003 (H4) XtraVision Halogen Headlight Bulb
Updated June 11, 2026
The Sylvania 9003 (also known as H4 or HB2) XtraVision is a halogen headlight bulb designed as a direct replacement for dual-beam headlamps. It provides both low and high beams from a single bulb, delivering improved downroad visibility over standard halogens. Commonly used in cars, trucks, motorcycles, and snowmobiles, this 60/55W bulb is a popular upgrade for vehicles equipped with an H4 socket.
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Function & Fitment
The 9003/H4 bulb uses a dual-filament design to produce both low-beam and high-beam light patterns. It fits into standard H4 headlight housings, often replacing older or dimmer bulbs. The XtraVision variant is engineered to provide a brighter, whiter light (approximately 3300K color temperature) while maintaining a long lifespan. It is compatible with a wide range of vehicles, including cars, trucks, motorcycles, and snowmobiles that use the 9003/HB2/H4 base.
Common Failure Symptoms
Typical signs of a failing or worn-out 9003/H4 bulb include noticeably dimmer light output, flickering, or complete burnout of one beam (low or high). Yellowing or clouding of the glass envelope can also reduce light output. Because halogen bulbs degrade over time, replacing both bulbs simultaneously is recommended to maintain even illumination.
Installation Notes
When installing, never touch the glass bulb with bare fingers; oils from skin can create hot spots and cause premature failure. Use gloves or a clean cloth. Ensure the bulb is properly seated in the socket and the locking ring is secure. Avoid exposing the bulb to moisture. After installation, test both low and high beams to confirm correct function. No modifications are required for direct OE replacement.
