Latest guides
Practical notes from the Guides section.
- Are H11 and H8 Bulbs the Same?H8 and H11 bulbs look similar but are not the same. Compare wattage, fit, heat, and safe compatibility before swapping either bulb.
- Headlight Bulb Equivalent ChartCompare common headlight bulb equivalents, including H4, 9003, HB2, H13, 9008, 9005, 9006, and more, with practical fitment checks.
- Headlight Bulb Cross-Reference GuideLearn how to cross-reference headlight bulb standards, compare bases and ratings, verify LED swaps, and avoid fitment or beam-pattern problems.
- Can I Use a Different Bulb Size in My Car?Learn when a different headlight bulb size is safe to use, how to verify fitment, and why base, wattage, beam pattern, and legality matter.
- What Does HB4 Mean? HB4 and 9006 ExplainedHB4 usually means 9006. Learn the designation, equivalent bulb numbers, differences from 9005 and H11, and how to confirm fitment.
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.