Collection: Bulbs H4

H4 car bulbs – how to select the correct lighting

The H4 bulb is a dual-filament halogen bulb used in headlamps that provide dipped and main beams using one bulb. The H4 designation identifies a bulb family, but compatibility also depends on the lamp and vehicle manufacturers' specifications.

How to choose an H4 bulb

Check the marking on the existing bulb or in the vehicle manual. Compare the lamp holder, number of filaments and correct fitting position. Do not choose a replacement simply because it looks similar. For kits and multi-purpose products, verify exactly which bulbs are included.

Replacement and safe use

Switch off the lights and let the bulb cool before replacement. Fit it securely in the headlamp, avoid touching the glass with bare fingers if the manufacturer forbids it, and use only bulbs approved for that fitting. Afterwards, check that the lights work and adjust their alignment if required.

Explore other car bulbs and compare specifications with the vehicle manual.