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  • Worldwide shipment
  • 14 days to return
  • 2 year warranty
  • Shipped within 2 business days
  • High quality materials

Audi A4/S4 B6 (2001-2004) - Bi-xenon headlights (D1S)

Car Retroquick kit

Audi A4/S4 B6 (2001-2004) - Bi-xenon headlights (D1S)



LED parking light

€ 149,95 Custom made Expected delivery time: 2-3 working days

This Audi A4 B6 retrofit kit contains everything you need to swap your old, blacked-out single-xenon (low-beam xenon only) projectors for powerful new bi-xenon (both low- and high-beam xenon) projectors. Using the exact same mounting points, it makes retrofitting quick and easy. And, most importantly, it will take your A4 to the next level – just check out the test pictures! This is way beyond what the majority of OEM projectors can achieve.

Of course, with the Mini H1 being such a common retrofit, there are plenty of cheap kits on the market, many of which are claiming superiority by labelling themselves version 6.0, 7.0, etc. But names are pointless here; what matters is the actual output, so we’ll let the test pictures speak for themselves.

You get what you pay for.

Retrofitlab’s Mini H1 series are without question the most popular bi-xenon designs in our range, and for good reason. These are in fact the very brightest projectors available for direct mounting in H4 and H7 reflectors!The Mini H1 Primo is our original design. It provides a dazzling light output unmatched by most OEM projectors. Yet, this is the more basic of the two models.

The Ultimo is our new Mini H1 design. Going beyond even the Mini H1 Primo, it offers a further 20-25% improvement in light output! In addition to its superior reflector, the Ultimo also features improvements such as a rock-solid threaded bulb mount and an alloy steel lock nut.

For a side-by-side comparison of the Mini H1 Primo and the Mini H1 Ultimo, check out this video. You can select the Ultimo or the Primo in the options menu above. No matter which model you pick, you will enjoy crystal-clear 2.5 lenses, colour temperatures ranging from 3,000K to 6,000K and a wide low beam with a bright hotspot and sharp cutoff. The high beams are like the sun – truly impressive for a projector this compact.

Such a light output would not be possible without efficient ballasts. If you’re happy with the ballasts that you’ve already got, simply leave them in place. Alternatively, add a set of our Aharon digital 35W ballasts to your order. The Aharon ballast has – as opposed to many other aftermarket units – been tested to generate a full 35W. It comes in a rugged and extremely compact housing perfect for retrofitting, and its in-wire starter warms xenon bulbs in as little as five seconds. The Aharon ballast is also Canbus-proof, so you won’t get any bulb failure readings on your display, and the original beam level system will not require any adjustments. It’s the perfect ballast to complement the included Audi A4 B6 wire harness, which connects directly to the original wiring. A high beam splitter is also included, making for easy integration of the bi-xenon mechanism. Power supply is strong, steady and reliable.

Lastly, this kit provides every single part that you will need for retrofitting. In order to keep the price low, we have however assumed that you will keep your existing xenon bulbs. Depending on how old those are, you may want to also order a new set of bulbs to get the most out of your retrofitted system. Xenon bulbs do lose up to 70% of their maximum brightness over time.

This complete Audi A4 B6 retrofit kit is inspected by our internal quality control prior to shipping and comes with a solid 2-year warranty. It also includes highly rated technical support from your lighting experts at

Should you have any questions prior to purchase, please check out our FAQ page or refer to the chat box below.

We look forward to brightening your day (not to mention your night)!

This is an easy retrofit that even complete novices can do, but those with more skills and experience will be quicker. Discounting removal and replacement of the headlights, you could expect the job to take anything from less than one to two hours.

You do not even have to open the Audi A4 B6 headlight. Simply remove the existing projector through the bulb access port at the rear and replace it with your upgraded projector. Done.

For detailed instructions, please refer to the fitting instructions PDF.

Want to have the kit installed by a professional? Check out list of installers

Professional retrofitting

This complete kit has been especially developed to enable retrofitting at home, saving you the cost of installation. However, should you prefer to have a professional carry out the retrofit, you can simply mail your headlights to the nearest participating workshop. They will then perform the retrofit and return the upgraded headlights to you, ready for use.

Please note that, for professional retrofits, you should order your Retrofitlab kit or parts directly from the workshop in question (it saves you money on shipping).

To find the nearest workshop, please refer to Professional retrofitting

This is a complete retrofit kit. If you are ordering all of the below, or if you already have access to compatible ballasts and/or bulbs, it includes everything you need to convert your xenon setup into powerful bi-xenon projector headlights.

Kit base (always included)
- 2x Mini H1 bi-xenon projectors
- 2x Audi A4 B6 wire harnesses (H7 splitter, D1S adapter)
- 2x Audi A4 B6 mounting brackets

Optional inclusions
- 2x bulbs as per your selection
– 2X Aharon digital ballast
- 2x color matching LED parking lights (also known as side light or position light)


This kit was just perfect kit for my -04 a4 b6. Old projectors were burned badly and I wasnt feeling safe while driving out of daylight. Now even the night time looks like daylight! Installation was kinda hard, take your time while cutting headlight and be sure to fit projectors correctly.

Kit was very easy to install; hardest part was trimming the plastic in the headlight housing for the solenoid which added more time to the process. I reused my existing bulbs which was a plus. Night time visibility is 100 times better than the OEM Valeo bi-xenon which prevented me from seeing farther than a couple of feet. It was unsafe and made me not want to drive at night. I now just want to drive at night simply because I can actually see more than a foot or two ahead of me.

Some hard work, but at the end it was a great solution, now I feel I'd do the same job in half the time.
Because I didn't want to damage anything I did a lot of testing.

It had everything I needed to fix my headlight issue for my Audi.

Nach dem Einbau war es ein Unterschied wie Tag und Nacht was das licht angeht. Würde ich jederzeit wieder machen.

Am tăiat din faruri am urmat toți pășii scriși acolo și dupăia băteau farurile 5 metri iar luptele nu ereai centrate în far ereai prea jos...în privința luminii ..este o îmbunătățire mare ...recomand cu placere !

Aqui es donde esta lo importante en realidad, el producto, he de decir que instale las lupas en unos faros de un alfa 166 que lamentablemente no alumbraba nada debido al deterioro de la lupa original de marca valeo y aunque no es tan sencillo como en el video de youtube ya que mi faro estaba bastante deteriorado y hubo que ir abriendolo con mucha paciencia y una pistola decapadora siguiente los pasos del video y un pulido y lacado posterior del faro ha quedado como nuevo y alumbra facilmente el triple que antes estoy muy muy satisfecho

Installed these projectors to Vw Touareg AFS lights. Works good with bracket inc in this kit! Need minor work to get them fit, but overall very good product!! Light output is really good, sharpness is totally great! Yeah! I can see road again! THX!

This kit has improved my light output significally. My standard valeo reflectors were burnt and I found a temporary solution, I taped the aluminium tape inside the reflectors. THe output was better but not as good as with this new kit.

Some mistakes that I made:

On the picture, you can see that you have to cut right corner on the projector. Well, I did cut the right corner on both of them, but I did not relize that on the picture is the right headlight and the projector.
In other words: right projector - right corner, left projector - left corner.
To make hole in headlight: the knife wont help you here. I used a small saw driven on compressed air. Powerfile will also do the job. I have to repeat, DO NOT waste your time tyring to make a hole with a knife!

The projector has to be slighty modified with grinder in order to fit it the bracket in the headlight.

Things you need before you start:

Powerfile / a small saw (electric or for compressed air)
Vacuum cleaner - to clean the headlight after you make a hole in it

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