A. With a separate vehicle holder

For kits supplied with a vehicle-specific adapter.

1. Remove the original bulb. Unplug the connector and release the original holder or clip using the vehicle’s instructions.
2. Identify the matching adapter. Compare the locating tabs and orientation with the original fitting. Do not force a different holder into place.
3. Separate the bulb collar, if designed to detach. Use the release method supplied with your LED bulb. Do not pull off a fixed collar.
4. Fit the collar and adapter in the specified order. Some adapters mount to the collar before entering the headlight; others fit to the headlight first. Seat the locating tabs fully and secure the correct retaining mechanism.
5. Insert and lock the LED bulb. Where the collar is fitted first, insert the bulb into the secured collar and engage its lock as instructed. Check that the assembly cannot rock or pull loose.
6. Connect and route the wiring. Keep cables clear of the fan, retaining clip and cover seal. Secure any external driver as instructed.

B. Without an extra vehicle holder

Original spring clip + removable bulb collar

1. Remove the old bulb. Disconnect the plug and release the original spring clip.
2. Remove the LED’s collar, only if detachable. Note its locating-tab position.
3. Seat the collar first. Place it flat in the original bulb seat, with its tabs correctly aligned. Close the original spring clip over the collar as instructed.
4. Insert the LED bulb into the secured collar. Engage the bulb’s lock and check that it is firmly seated.
5. Connect the plug. Route the wiring safely and refit the cover without trapping cables.

If your LED has a fixed collar, follow its own fitting method. Do not assume it can be dismantled.

Direct twist-lock base

Some bulbs use an integrated locating base and seal, with no extra holder.

1. Remove the original bulb using the specified release direction.
2. Match the new bulb’s locating tabs with the headlight slots.
3. Seat the seal evenly and rotate in the specified locking direction until secure. Do not force it or assume all bulbs turn the same way.
4. Reconnect the plug and check the wiring and rear cover.

Position, test and finish

• Follow the bulb’s orientation instructions. Many two-sided LED designs use emitters facing left and right, but this is not a universal setting. Do not use the cable or copper strip as a universal alignment mark.
• Adjust only an adjustable bulb. Keep the locating base locked. Never loosen the holder to aim the light.
• Check the beam before driving. Compare both dipped beams on a level surface facing a wall. A scattered or unusually high beam needs the seating and orientation checked, followed by a professional alignment check.
• Keep cooling space clear. Nothing should touch the fan or become trapped under the cover. The dust cover must seal correctly.
• Test all functions you replaced. Check dipped beam, main beam and any other relevant functions.

Open our headlight alignment guide →