CSL White/Yellow Switchable DRL Modules — BMW G20/G21 3 Series (Laserlight)
Switchable White/Yellow DRL — Pre-Installed Heatsinks — Plug-and-Play — Pre-LCI Laserlight (Option 5AZ) — 2019–2022
G20 Sedan • G21 Touring • 330i • M340i • Factory Laserlight (5AZ) • Pre-LCI • 2019–2022
The Laserlight was the headlight BMW put on the press cars — the thick-bar DRL with blue laser accents that made every brochure shot of the G20 look like it belonged on a showroom floor. What BMW didn't include is a way to switch that DRL to yellow. These modules fix that — switchable from the high-beam stalk in under two seconds, plus strobe, breathing, and an automatic mode tied to your low beams. White is calibrated to match your factory Laserlight DRL color temperature; the car looks factory-correct at a glance.
Fits factory Laserlight (option 5AZ) on pre-LCI 2019–2022 G20/G21 only. Does not fit Standard LED (5A2), Adaptive LED (552), or LCI (2023+). Available in separate EU-market and US-market versions — see below.
Step 1 — Is This Your Headlight?
These modules fit factory BMW Laserlight only — option 5AZ on pre-LCI 2019–2022 G20/G21. The giveaways: blue "L" accents inside the headlight housing, a thick horizontal light bar DRL, and often a "BMW Laser" script etched into the lens. If your car has Adaptive LED (no blue accents, beams swivel) or Standard LED (static beams, no blue accents), these modules are not compatible.
Laserlight (Option 5AZ)
Blue "L" inlays and thick-bar DRL signature.
Step 2 — EU or US Market?
BMW uses different DRL electronics for EU-market and US-market Laserlight headlights, so we ship two dedicated versions. Pick the one that matches the headlight in your car, not the country you're driving in.
How to know which you have
If your car was originally sold new in the EU, UK, or any right-hand-drive market, choose EU. If it was originally a US-market car — even if it's since been imported to Europe — choose US. The original-sale market sets the headlight electronics for the life of the car. Grey-import cars retain their original headlight hardware.
Not sure? The sticker on the headlight lens carries BMW's part number. Matching it to the list below confirms your version. You can also send us your VIN and we'll look it up in under an hour.
Not sure if your car has Laserlight — or which market version?
Send us your VIN and we'll confirm both in under an hour. Contact us here →
Complete modules, not bare boards.
Each Eleron module arrives as a finished assembly — LED board bonded to its own aluminum heatsink with thermal interface pre-applied. The install is clean mechanical work: unbolt, unplug, swap, bolt. Your factory modules come out untouched and stay factory-correct in a drawer, so the upgrade is fully reversible whenever you want. No separating boards from heatsinks, no thermal paste, no board-level work.
Five modes · One stalk · No app
DRL Control
Every mode switches from your factory high-beam stalk with low beams off. Your selection persists through ignition cycles.
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3×Manual Toggle
Switches between solid White and solid Yellow DRL. Your choice stays set until you change it.
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5×Auto Mode Eleron Exclusive
Set it and forget the toggle. The DRL follows your low beams automatically: Yellow when low beams are off, White when they come on. Most competitor modules only offer manual toggling.
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7×Strobe
A left-right progressive strobe in your current DRL color. Flash 7× again to switch the strobe to the other color. A show mode, not for road use.
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11×Ambient Breathing
A slow, subtle pulse where the DRL dims in and out. Best used while parked or at idle — not intended for driving.
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9×Reset
Returns the module to factory White DRL and clears all mode settings.
Built for Laserlight
Plug-and-Play — Zero Coding
Built specifically for the Laserlight DRL circuit. Connects to your factory controller and wiring — no coding, no CAN adapters, no error codes. Your BMW doesn't know anything changed.
Matched Pairs — Binned Together
Left and right modules are color-matched at QC before they ship, so your DRLs read identical side-to-side. Cheap imports often mix LED bins — one headlight slightly warmer than the other — and once you've noticed the difference, you can't un-notice it.
Fully Reversible
Laserlight is a premium option that holds resale value. Factory modules come out intact and go in a drawer — bolt them back in for a lease return, sale, or dealer visit. Same process, same screws, no residue.
2-Year Warranty
Two years of coverage from delivery date on every set.
Installation
Honest version: the G-chassis headlight design means the DRL modules aren't top-accessible from the engine bay. You have two paths to reach them. The cleaner method is to remove the front wheels and fender liners — this gives enough room to release the headlight mounting bolts and pull each unit forward a few centimeters to work on the back. The alternative is a full front bumper removal, which is more involved but gives you full working access.
Once you have access: disconnect the factory DRL connector from the rear of the headlight, unbolt the OEM module, plug the Eleron module into the same connector, secure with the original screws. Test both White and Yellow DRL before closing everything up. Plan for a half-day if you're comfortable with interior trim work, or book a local shop if you'd rather not touch the bumper or fender liners yourself.
Tools: T20 and T25 Torx bits, 8mm and 10mm sockets, trim removal tool, jack and stands if you're going the wheel/liner route.
Frequently Asked Questions
No. The DRL is a separate LED circuit from the laser-assisted main beam. These modules only replace the daytime-running LED board — your laser high-beam system continues to function exactly as BMW designed it.
Laserlight (option 5AZ): blue "L" accents visible inside the headlight housing, a noticeably thicker horizontal DRL light bar, and often a "BMW Laser" script etched into the outer lens. Adaptive LED (option 552): angular etched DRL ring, beams that swivel with steering, no blue accents. Standard LED (option 5A2): same DRL shape as Adaptive but static beams that don't swivel. Each uses a different DRL connector — you need to match the product to your headlight type.
No. Adaptive LED uses a different DRL circuit and connector. We sell a dedicated Adaptive LED DRL module — check our G20 Adaptive LED product page or message us.
No. Standard LED uses different DRL electronics from both Adaptive LED and Laserlight. We make a separate product — message us and we'll point you to the right one.
Yes. The G20 Sedan and G21 Touring share identical Laserlight headlight housings and DRL modules when equipped with option 5AZ.
No. The LCI uses a redesigned headlight with a different DRL architecture. These modules are for the pre-LCI (2019–2022) only.
Pick the market the car was originally sold in. If it was a US-market car that's now in Europe, order the US version — the headlight electronics don't change when the car is re-registered. The sticker on your headlight lens carries BMW's part number and confirms the market. If you're unsure, send us your VIN and we'll check it against the factory build sheet.
Yes. The DRL modules on the G20 sit behind the headlight housing, not on top of it. There's no engine-bay shortcut. The wheel-and-fender-liner route is cleanest; full bumper removal gives more working room. A shop will quote 1–2 hours of labor.
No. The modules draw the same current as the factory DRL and speak the same CAN signals to your headlight controller. No coding needed, no codes thrown.
Not if you keep your original modules. The install is fully reversible — factory modules come out intact, store them in a drawer, and reinstall them before selling or returning a lease. Laserlight commands a premium on used G20 listings, and the OEM hardware stays OEM.
White matches the factory Laserlight DRL color temperature, so the car looks stock at a glance — the right pick when you want the OEM aesthetic. Yellow is the CSL-style signature, the detail that sets M4 CSL and CS models apart at shows and meets. Switching takes under two seconds from the driver's seat, so your configuration isn't locked in.
Technical Specifications
| Product Type | DRL LED Module (complete unit with heatsink) |
|---|---|
| DRL Colors | White (~6,000K) / Yellow (~3,000K) — switchable |
| Modes | Static White · Static Yellow · Auto · Strobe · Ambient Breathing · Reset |
| Switching | High-beam lever (low beams off) — no app, no remote, no external controller |
| Heatsink | Aluminum — pre-installed (complete module swap, no board-level work) |
| Mounting | Torx screws — direct replacement of factory DRL module |
| Operating Voltage | 12V DC |
| Coding Required | No |
| Dashboard Warnings | None |
| Welcome Light | Preserved |
| Laser High-Beam Function | Unaffected (separate circuit) |
| Compatibility | G20 Sedan · G21 Touring · Factory Laserlight (Option 5AZ) · Pre-LCI · 2019–2022 |
| Not Compatible | Standard LED (5A2) · Adaptive LED (552) · LCI (2023+) |
| Market Versions | Separate EU-market and US-market SKUs — choose based on original-sale country |
| Sold As | Set (Left + Right modules) |
| Warranty | 2 Years |
OEM Cross-Reference Numbers
| Shared G20/G21 Laserlight · 2019–2022 |
63 11 8 496 134 |
|---|---|
| EU Market — Laserlight (5AZ) G20/G21 · 2019–2022 |
Left: 63 11 8 496 135 Right: 63 11 8 496 136 |
| US Market — Laserlight (5AZ) G20/G21 · 2019–2022 |
Left: 63 11 8 737 145 Right: 63 11 8 737 146 |
Your headlight lens sticker will show one of these numbers. If your part number doesn't match, or you're not sure which version you have, send us your VIN and we'll confirm the correct one.