Alpha Series 9003/H4: product and installation guide
Alpha Series A1004 is the 9003/H4 LED bulb listing with 6000K white light and a 9–32V supply range. Match the lamp’s bulb designation, retainer and cooling space before choosing this product.
- SKU: A1004
- Bulb designation: 9003/H4
- Colour: 6000K white
- Listed input: 9–32V
- Cooling: Copper PCB, internal fan and liquid-filled thermal tubes
Compare the installed bulb marking, connector, retainer and available space before removing the original lamp. Test the appropriate lighting functions and check the final beam aim after fitting. A bulb-base match alone does not establish suitability for every housing or lighting circuit.
Frequently Asked Questions
How do I identify the single-bulb 9003/H4 option?
The dedicated single-bulb listing is SKU A1004-S. Match the exact SKU and package description when ordering, particularly when replacing only one bulb.
Does the H4 designation establish fit in every listed vehicle?
No. Verify the actual serviceable bulb, connector, retaining arrangement and space behind the lamp. A model name alone does not account for every original or replacement headlight.
How does A1004 differ from the Alpha-H4 product?
A1004 specifies 6000K white light and 9–32V input. Alpha-H4 specifies 6500K white and 9–16V input. Match the exact SKU and electrical requirement when replacing bulbs; the shared H4/9003 designation does not make their specifications identical.
What white-light colour does this exact product use?
This exact listing specifies 6000K white light. Match the SKU and product generation when replacing a bulb; another Alpha Series product can use a different colour specification.
Does this bulb product replace a complete factory LED headlight?
It is intended for a compatible serviceable-bulb application. A factory LED assembly can have integrated electronics and light sources that do not use a replaceable bulb of this type. Inspect the installed equipment first.
Will these bulbs prevent every dashboard warning or flicker?
Results depend on the actual lighting circuit and connections. Diagnose any warning or flicker before selecting an additional module, and check the physical lamp application separately.
What warranty applies to this exact Alpha Series product?
This product carries a lifetime limited warranty. The existing terms and exclusions for the purchased SKU apply.
What should I check before fitting this bulb?
Compare the mounting and retaining arrangement, connector and space behind the lamp. The original dust cap must fit correctly, and cooling parts or attached electronics need adequate clearance. Check the final beam aim after installation.
Compare bulb bases and product options in our LED bulb collection.
