Latest guides
Practical notes from the Guides section.
- Can LED Headlight Bulbs Overheat? Causes, Warning Signs, and PreventionLearn why LED headlight bulbs overheat, how to spot thermal problems, and how to improve cooling for longer bulb life.
- Fan vs. Fanless LED Headlight Bulbs: Which Cooling Design Is Better?Compare fan-cooled and fanless LED headlight bulbs, including heat control, noise, space, reliability, and practical installation checks.
- Why LED Headlight Bulbs Need Cooling FansLearn why LED headlight bulbs use cooling fans, how heat affects performance, and what to check before installing a fan-cooled LED upgrade.
- Do LED Headlights Last Longer? Lifespan, Heat, and Buying TipsLearn how long LED headlights last compared with halogen and HID bulbs, plus the heat, fitment, and quality checks that affect service life.
- Are LED Headlights Brighter Than Halogen?Learn whether LED headlights are truly brighter than halogen, how beam pattern affects visibility, and what to check before upgrading.
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.