Today we are tackling one of our favorite projects on the bench: a full BMW E46 Mini H1 bi-xenon retrofit. If there is one car on the planet that we love retrofitting more than any other, it is the E46 3 Series. The reason is simple: BMW designed these headlights with replaceable lenses, which means you can crack them open without any baking, heating, or ovens involved. In this guide we walk through exactly how we installed the newest Mini H1 6.0 bi-xenon projectors, powered by Morimoto 35W SS ballasts and standalone canbus harnesses, and dressed up with E46 R-style shrouds for a clean OEM appearance. Follow along and you will see just how approachable this project really is.
What Is in the Mini H1 Retrofit Kit
At the heart of this kit are the newest Mini H1 6.0 bi-xenon projectors. These little projectors are the core upgrade, and they pack a serious punch for their size. Powering them, we have our Morimoto 35W SS ballasts paired with standalone canbus harnesses that cancel out the errors on the dashboard so you do not get any annoying warning lights after the install. We also included a highbeam splitter so that you can run dual high beams with the Mini H1 bi-xenons, which is exactly what you want on a car like the E46.
To give the finished headlight that factory look, we used the E46 R-style shrouds along with centric rings so the shrouds can fit properly onto the projectors. If you want to understand what each of these pieces does before you order, we put together a full breakdown of every part in a bi-xenon retrofit kit that is worth reading first. You can also browse Morimoto’s own listing for the Mini H1 Stage III kit on Morimoto’s own site to see the projector in detail.
This particular customer went a step further. He is also adding the BMW E46 specific LED Angel Eyes that come in a kit for these cars, and he ordered a set of brand new lenses to replace his tired old ones. That last part is a really good idea. If you have old, hazed lenses, you simply are not going to get the best results out of your retrofit and you will not be able to see all the good stuff behind them. Fresh lenses make a night and day difference in clarity.
Removing the E46 Headlight Lens Without Baking
Here is what makes the E46 such a treat to work on. The lens can actually be removed from the housing without any baking, no heating, nothing at all. It uses several clips all around the outside edge. Pop those off and the lens comes right off, with just a rubber seal sitting in between. That alone saves you the biggest headache found in most retrofits.
The first thing you need to do is remove the side marker. These usually come off with the housings, and they are as simple as squeezing a few clips and popping them out the front.
Once the side marker is off, go around the edge with a big blade screwdriver and carefully pop up these clips to remove the lens. Just make sure not to break them, because they can be a little brittle if the headlight is old. Overall, though, it is really easy. Take the lens off first, and then you can do the retrofit inside from there.
Preparing the Mini H1 Projector
Once you have the lens removed, you are literally already ready to install the projector into the housing. It is not unrealistic to expect that you can have this retrofit open and shut within about an hour, as long as everything goes right.
We start by disassembling the Mini projector. It comes with the three-prong bulb holder pre-installed, and there should just be a screw on the back that you need to remove. Put the silicone washer for H7 applications onto the threaded shaft, run that through the front of the reflector, and use the H7 adapter plate. What that adapter plate does is auto adjust the alignment, so that when you put the headlight back on the car the beam pattern from the projector is perfectly level. Put that on after the threaded shaft is through the front of the reflector, tighten everything down with the included hex lock ring, and reinstall the bulb holder.
The One Modification You Must Make
The only modification you actually have to make to the headlight itself is to use a drill bit to put a small hole at the bottom of the low beam reflector, just underneath the existing hole for the light bulb. What you need that for is so the wiring for the bi-xenon solenoid can pass through without being crushed by the lock ring hardware. It is a small step, but skipping it can pinch and damage your solenoid wiring, so take your time here.
Housing Differences: Bosch/AL vs ZKW
It is worthwhile to note that due to the depth on some of the reflectors, depending on the specific BMW E46 model you have, the threaded shaft on the projector may not be long enough to fit all the way through and get all the lock ring hardware on there. For the AL or Bosch headlights, you might have to trim down a little plastic piece with a Dremel tool. It should take about a minute of grinding to reduce the thickness of the bulb holder seat so it is not as deep.
In the case of the ZKW based headlights, there is a little metal bulb holder that you tap out with a hammer and a flat blade screwdriver, tapping it so it comes out the back of the housing. So for the ZKW headlights it is a little metal piece to tap off, and for the Bosch headlights you grind down a little plastic piece. Either way, it should be very easy. If your lenses or housings are damaged, the BMW E46 / ZKW Headlight Repair Kit is a great companion for freshening things up while you are already in there.
Installing the Shroud and Angel Eyes
Once the projector is secured, the only thing left is to install the shroud. On our finished retrofit, the shroud is secured on with JB Weld and the centric ring. That centric ring is what lets the R-style shroud fit properly onto the projector body, keeping everything aligned and clean.
With the shroud set, we mounted the BMW E46 specific LED Angel Eyes. Since we removed both of the rubber caps and now have wires coming through for both the Angel Eyes and the bi-xenon solenoid, we need to poke a couple of holes into the original rubber caps so we can pass the wiring through them.
Installing the HID Bulb and Reassembling
The last thing to do on the projector side is install the H1 HID bulb. If you look at some of our other guides on the Mini H1 projectors, we go over this in detail, but it is pretty much as simple as cleaning the bulb off with an alcohol swab, putting it in place, and using the included metal clip to lock it in. If you want to explore an alternate H1 bulb and ballast setup, the Morimoto Elite H1 HID ballast and bulb system is another proven option we carry.
With the housing fully assembled, we make sure the whole area, including the high beam reflector, is clean and free of any dust or fingerprints that might have gotten on during the retrofit. From there, line up the aiming adjusters with the original screws inside the housing and screw them back in with the knobs on the back of the headlight, tightening them firmly. After that, put the original black trim piece that goes around the front edge into the brand new lens, clip the lens on, and reinstall the headlight back on the car.
Why This Retrofit Is Worth Doing
The E46 rewards you for the effort with a genuinely clean, factory-looking result thanks to those R-style shrouds and centric rings. The Mini H1 6.0 projectors deliver a sharp, modern beam pattern, the Morimoto 35W SS ballasts keep everything running reliably, and the standalone canbus harnesses keep your dashboard free of errors. Add in the highbeam splitter for dual high beams and the E46 specific LED Angel Eyes, and you have an upgrade that looks and performs like it belongs on the car.
If you drive something other than an E46 and want to try a similar project, check out our full lineup of universal bi-xenon retrofit kits. And for even more inspiration and options across different vehicles, take a look at Headlight Revolution’s projector retrofit kit catalog. Whether you are a first-timer or a seasoned builder, the E46 is one of the most satisfying platforms to retrofit, and we hope this guide gets you excited to try it yourself.
Frequently Asked Questions
What projectors are used in this BMW E46 retrofit?
The retrofit uses the newest Mini H1 6.0 bi-xenon projectors as the core of the kit.
What ballasts and harnesses are needed for the Mini H1 retrofit?
The kit uses Morimoto 35W SS ballasts along with standalone canbus harnesses to cancel out dashboard errors, plus a highbeam splitter for dual high beams.
Can the E46 headlight lens be removed without baking the housing?
Yes, the E46 was designed with replaceable headlight lenses that pop off using clips around the edge, with no baking or heating required.
What modification is required inside the headlight housing?
A small hole must be drilled at the bottom of the low beam reflector, just under the existing bulb hole, so the bi-xenon solenoid wiring can pass through without being crushed by the lock ring hardware.
Do all E46 headlight housings fit the projector the same way?
No, depending on whether the housing is Bosch/AL or ZKW based, you may need to trim the plastic bulb holder piece with a Dremel or tap out a metal bulb holder to make room for the projector shaft.
Meet the Experts Behind The Retrofit Source
Tyler Jordan – Technical Writer
Tyler works directly with the TRS product R&D team, bringing over a decade of automotive aftermarket lighting experience to every article. An avid enthusiast with hundreds of personal installations under his belt, his content is built on hands-on knowledge from the workbench, not spec sheets.
Caleb Morgan – Marketing Manager
Caleb brings over a decade of automotive lighting industry experience and works with TRS customers daily on the front lines. With hundreds of personal lighting installations and a direct feedback loop from real buyers, his content addresses the questions and problems that actually matter.
