Aharon AvantiLED D4S LED replacement LED bulb for D4S Xenon HID

Aharon AvantiLED D4S LED Xenon Replacement Bulb, Plug & Play on Original Ballast, 4300K or 6000K

Direct LED replacement for your D-series xenon headlight bulb, available in 4300K warm white (OEM look) and 6000K cool white. Connects directly to your car's original Xenon HID ballast, no conversion or extra wiring needed.

• Choice of 4300K or 6000K
• Plug & play on original ballast
• Aluminum housing
• Direct replacement
• Tested by RetrofitLab
• Long service life

The Aharon AvantiLED D-Series LED is purpose-built as a plug-and-play replacement for D-series xenon bulbs. It runs directly on your car's original xenon ballast, no extra converter or adapter cable required. The robust aluminum housing provides effective heat dissipation, essential for stable, long-lasting light output.

LED vs xenon HID: what's different

Two practical differences come with switching from xenon HID to LED:

• Instant full brightness. No warm-up delay, a xenon arc needs a moment to strike and stabilize, the LED is at full output the instant you switch on.
• Stable color from the first second. Xenon HID bulbs can start slightly pink or blue before settling into their final color as the arc warms up. The LED shows its final color immediately.

The one place a fresh xenon bulb still has the edge is peak light output, see the FAQ below for the honest comparison.

Which color temperature should you choose: 4300K or 6000K?

The bulb is available in two color temperatures, pick whichever suits your car and preference:

4300K, warm white (OEM look): the color closest to the original xenon bulb. Gives a slightly yellow tint that most drivers find natural and pleasant. The ideal choice if you want to keep the factory look.

6000K, cool white: a brighter, bluer-white light. Popular for a more modern look. Note: at higher color temperatures, effective light output on the road drops slightly compared to 4300K.

Not sure? Go with 4300K, it's the color closest to your original xenon and gives the best real-world light output.

Tested by RetrofitLab: D4S LED vs xenon light measurement

We test our bulbs ourselves on a calibrated measurement rig conforming to ECE R112/R123, in a real car headlight. In our test, the D-Series LED delivered stable light output after warm-up and a clean beam pattern with minimal stray light above the cutoff, important for both your own visibility and the safety of oncoming traffic.

→ See our full D1S/D3S LED vs xenon test results

Technical specifications

Compatibility and road use: These products are not ECE-approved and must not be used on public roads in any exterior application. Use on public roads will invalidate both the operating license and insurance coverage.

Easy installation

1. Step 1: Remove the original D4S Xenon HID bulb from the headlight
2. Step 2: Insert the D-Series LED the same way into the bulb holder
3. Step 3: Connect the original ballast connector, no modifications needed
4. Step 4: Check the beam pattern and alignment

The bulb fits the original ballast without extra adapters.

Frequently asked questions

Does an LED replacement give more light than the original xenon?

A new original xenon bulb typically still produces slightly more light at the critical measurement points than an LED replacement. The perceived difference is often because the original xenon bulb was already aged and producing less light than when it was new. The D-Series LED offers a significant improvement over an aged xenon bulb. If raw light output matters more to you than plug & play LED convenience, the Osram D4S Night Breaker 220 is worth a look.

Will this bulb work with my original ballast?

Yes, the D-Series LED is specifically designed for the original Xenon HID ballast. No conversion or extra hardware is required.

Can I use this bulb if my car has a different D-fitting?

No. D-fittings look similar but are not electrically interchangeable: D1S (85V) and D3S (42V), for example, cannot be swapped, and the same applies to D2S (85V) and D4S (42V). The D-Series LED is designed exclusively for the original Xenon HID ballast that matches your fitting. Not sure which fitting your headlight uses? Check the original xenon bulb itself before ordering.