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Autodoc£0.71Visit shop HELLA Light Bulbs VW,AUDI,MERCEDES-BENZ 8GD 002 078-121 72454789,72493868,F737900020010 Bulb, indicator X825107041000,23103731,83985986,45433050012
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The HELLA 8GD 002 078-121 is a high-quality standard P21/5W bulb designed for automotive signaling, making it an ideal choice for vehicle maintenance professionals and car owners needing reliable replacements for position, marker, or indicator lights. It offers dependable performance and meets ECE safety standards, though users must verify their vehicle's specific socket compatibility and fitment requirements before installation to ensure a proper fit.
| Model Part Number | 8GD 002 078-121 |
|---|---|
| Brand | Hella |
It indicates a dual-filament bulb where one filament draws 21 watts (typically for signaling) and the other draws 5 watts (typically for positioning).
Please consult your owner's manual under the lighting section to confirm if your vehicle requires a BAY15d P21/5W bulb type.
Yes, this specific part number is supplied as a carton containing 10 individual bulbs.
No, this is a standard incandescent bulb and is not an LED replacement.
Yes, as it is ECE approved, it meets the necessary standards for legal road use in applicable regions.
Verify that the bulb is fully seated in the socket and the contacts are clean. Check the vehicle's fuse box for a blown fuse.
This is often a sign of a bad connection or incorrect wattage bulb; verify that the P21/5W specification matches your vehicle requirements.
Before installation, turn off the vehicle's ignition and switch off the light control to prevent electrical shorts. Access the light housing as instructed in your vehicle owner's manual. The BAY15d base uses a push-and-turn (bayonet) mechanism; simply push the bulb slightly inward and rotate counter-clockwise to remove, and press in and rotate clockwise to seat the new bulb. Avoid touching the glass portion of the bulb with bare skin, as natural oils can cause hot spots that shorten the bulb's lifespan. If you touch the glass, wipe it clean with a lint-free cloth and isopropyl alcohol before use. Always replace bulbs in pairs to ensure even brightness across the vehicle.
