H4

H4 bulbs have been used in a large number of cars, including larger popular vehicles such as by Honda CR-V and HR-V models and Suzuki Grand Vitara among others.

Unlike the single filament H1, the H4 car bulb is dual filament, and is able to offer both main and dipped beam within a single bulb.

You can find a wide range of choices of H4 bulbs below, check Amazon for pricing and more details.

Buy H4 Headlight Bulbs

Bosch H4 (472) Pure Light Headlight Bulbs - 12 V 60/55 W P43T - 2 Bulbs

Bosch H4 (472) Pure Light Headlight Bulbs - 12 V 60/55 W P43T - 2 Bulbs

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Philips 575528 RacingVision GT200 H4 car headlight bulb +200%, set of 2

Philips 575528 RacingVision GT200 H4 car headlight bulb +200%, set of 2

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Simply S472 H4 Car Bulb, 12 V, 60V, 60/ 55W, Comply Left ECE R-37, Base PK22n, Suitable for y 1 Headlights, Maximum Visibility

Simply S472 H4 Car Bulb, 12 V, 60V, 60/ 55W, Comply Left ECE R-37, Base PK22n, Suitable for y 1 Headlights, Maximum Visibility

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OSRAM COOL BLUE INTENSE H4, headlight bulb for halogen headlamps, xenon effect for white light, 64193CBI-HCB, 12V passenger car, duobox (2 units)

OSRAM COOL BLUE INTENSE H4, headlight bulb for halogen headlamps, xenon effect for white light, 64193CBI-HCB, 12V passenger car, duobox (2 units)

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(Now 16% Off RRP)

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Philips WhiteVision ultra H4 car headlight bulb, 4.200K, set of 2

Philips WhiteVision ultra H4 car headlight bulb, 4.200K, set of 2

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(Now 16% Off RRP)

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Philips RacingVision +150% H4 Headlight Bulb 12342RVS2, Twin Pack

Philips RacingVision +150% H4 Headlight Bulb 12342RVS2, Twin Pack

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1 x Standard Replacement 3 Pronged Car Headlight Halogen H4 Bulb 12V 60 / 55 Watt

1 x Standard Replacement 3 Pronged Car Headlight Halogen H4 Bulb 12V 60 / 55 Watt

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Sidaqi H4 55/60W Halogen Xenon Headlight Bulbs White 5000K High/Low Beam Lamp 12V Auto Car Fog light-2 Pack

Sidaqi H4 55/60W Halogen Xenon Headlight Bulbs White 5000K High/Low Beam Lamp 12V Auto Car Fog light-2 Pack

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10 x Eurolec H4 472 Halogen Car Headlight Headlamp Bulb 12v 60/55w P43T - Trade Pack

10 x Eurolec H4 472 Halogen Car Headlight Headlamp Bulb 12v 60/55w P43T - Trade Pack

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NOVSIGHT H4 LED Headlight Bulbs Hi/Lo Beam White 6500K 10000LM 50W/Pair Car Headlight Bulbs Kit Bright Waterproof 2 Lamps Zero Noise No Fan

NOVSIGHT H4 LED Headlight Bulbs Hi/Lo Beam White 6500K 10000LM 50W/Pair Car Headlight Bulbs Kit Bright Waterproof 2 Lamps Zero Noise No Fan

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What Is An H4 Bulb?

H4 is one of the four most common tyres of car headlight bulb. That range also comprises H1, H3 and H7 bulbs too, as well as the H4 variety.

In general, think of car bulbs the same way as you would with bulbs in light fittings at home, with a code that identifies the socket (aka cap or fitting) they are designed for. With vehicle lights, the code, in this case H4, identifies the configuration of prongs that allow the bulb and fitting to work together.

H4 is unique among this family of headlight fittings in that it is a dual filament bulb. The filament is the thing strand of metal (wire) that electricity passes through to create the light. Dual filament means that there’s two wires in one bulb, a huge space saver in the headlight unit. It’s also convenient to be able to replace one bulb and know that you’re driving with beams (full beam and dipped beam) in top condition. The downside of course, is when one fails, both much be replaced.

Are 9003 And HB2 Bulbs Interchangeable?

You might see various similar bulbs with different codes on the market. The most common are HB2 and 9003. Generally speaking, these are interchangeable in the sense that they’ll work perfectly in an H4 socket in place of an H4 bulb, but they’re obviously not the same as they’ve got a different number assigned to them. The reason for the variations in otherwise similar bulbs is to meet different legal requirements around the world (for example the United States) where the bean patterns are (historically) very different to the UK. For that reason, it’s wise to stick to an H4 bulb in an H4 socket to be sure of legal compliance.