Latest guides
Practical notes from the Guides section.
- H4 vs. H7 Bulbs: Differences, Fitment, and Replacement ChecksLearn the key differences between H4 and H7 bulbs, including filaments, connectors, fitment, beam functions, and practical replacement checks.
- 9006 vs H11: Bulb Fitment and DifferencesCompare 9006 and H11 bulbs, including bases, connectors, typical uses, wattage, fitment checks, and safe replacement tips for DIY drivers.
- 9005 vs H11: Compatibility and Replacement Guide9005 and H11 bulbs are not direct replacements. Compare their bases, wattage, beam use, and practical checks before attempting a swap.
- 9005 vs. 9006 Bulbs: Differences, Fitment, and InterchangeabilityCompare 9005 and 9006 bulbs, including beam function, wattage, fitment, interchangeability, and checks before installing a replacement.
- H8 vs. H9 vs. H11: Bulb Differences and Fitment GuideCompare H8, H9, and H11 bulbs by wattage, output, fit, and safety. Learn how to confirm the correct bulb before swapping.
What this site is for
Look up bulb positions, cross-references, and year-by-year fitment without guessing from a parts-counter printout.
Vehicle fitment
Make → model → year → positions and bulb codes from the Autotk catalog.
Bulb types
H11, 9005, 9012 and the rest — fitment counts, positions, and cross-reference notes from the catalog.
Guides
Practical swap notes: halogen vs LED, legality caveats, and common mistakes.