How to Install G87 Yellow DRL Module (and G42 yellow DRL)

If you own a BMW G87 M2 or G42 2 Series, you’ve probably seen CSL-style yellow daytime running lights (DRLs). The G87 yellow DRL module replaces the factory white DRL board with a yellow LED module.

Reasons people install it:

• Gives the car a CSL-inspired motorsport look.

• Stands out from the factory white DRLs.

• It’s reversible — just reinstall your OEM boards later.
  
  

This mod fits both G87 and G42 adaptive LED headlights and is popular among BMW owners on BimmerPost.

Tools and Parts You Need

Parts:

• G87 yellow DRL module set

• Thermal adhesive or pre-applied backing

• Replacement screws or gaskets (if needed)
  
  

Tools:

• Torx bit set

• Plastic pry tools

• Screwdrivers

• Ratchet set

• Flashlight

• Gloves

• Multimeter

• Masking tape for labeling

• Trim removal kit
  
  

Tip from owners on F87 BimmerPost: use thermal adhesive, not thermal paste — it sticks better to the heatsink.

Safety and Legal Notes

• Disconnect the negative battery terminal.

• Work in a dry, clean area.

• Handle the LED boards with gloves.

• Keep screws and clips organized.

• Check local laws — yellow DRLs may not be street legal everywhere.

• Don’t touch the LED face directly.
  
  

If you’re not confident, get a professional to install it. BMW headlights are expensive to replace.

Step 1: Prepare Your BMW for the Install

1.1 – Park and disconnect power

• Park on a flat surface.

• Open the hood and disconnect the negative battery terminal.
  
  

1.2 – Remove panels for access

• Take off the front bumper or wheel liner for easier reach.

• Cover painted areas and trim with masking tape.
  
  

1.3 – Prep for removal

• Clean the area around the headlights.

• Label connectors with masking tape so you can reconnect them correctly later.

• Take clear photos of each step for reference.
  
  

Step 2: Remove the Headlight or Access the DRL Module

You can reach the DRL board in two ways:

Option 1 – Full headlight removal

• Remove the Torx bolts holding the headlight.

• Disconnect all electrical plugs.

• Carefully slide the headlight forward.

• Rest it on a towel to avoid scratching the lens.
  
  

Option 2 – Access from behind

• On some G42 models, you can reach the DRL from behind the fender liner.

• This method saves time but requires smaller hands and patience.
  
  

Tip: Check your car’s build — clearance varies by trim level.

Step 3: Remove the Factory White DRL Board

3.1 – Open the housing

• Take off the plastic or rubber access cover.
  
  

3.2 – Locate and remove the OEM DRL board

• Find the white DRL board inside the housing.

• Remove the screws using the proper Torx bit.

• Disconnect the flex cable or wiring plug.

• Gently lift the board out.
  
  

3.3 – Watch for the resistor

• On the driver’s side, a small resistor is easy to scrape off — handle carefully (reference forum guide).
  
  

3.4 – Clean the surface

• Wipe the area with isopropyl alcohol to remove old adhesive and residue.
  
  

Step 4: Install the New G87 Yellow DRL Module

4.1 – Prepare the surface

• Remove old thermal material completely.

• Apply a thin, even layer of thermal adhesive (or VHB thermal tape) on the heatsink.
  
  

4.2 – Align and mount the new board

• Position the G87 yellow DRL module exactly like the original.

• Press it gently but firmly into place.
  
  

4.3 – Secure and connect

• Tighten screws evenly.

• Reconnect the cable or plug, ensuring correct polarity.

• Optionally, use dielectric grease to protect the connector from corrosion.
  
  

Tip: Avoid over-tightening — it can warp the board or damage the housing threads.

Step 5: Test Before Sealing It Up

5.1 – Reconnect power

• Reattach the negative battery terminal temporarily.
  
  

5.2 – Test lighting

• Turn on the DRL or parking light setting.

• Check that both sides glow yellow evenly.

• Watch for flicker or “bulb out” messages on the dashboard.
  
  

5.3 – Fix any issues

• If one side doesn’t light, check the connector or polarity.

• If an error appears, clear it using diagnostic software.
  
  

5.4 – Disconnect again before reassembly

• Once both DRLs work correctly, disconnect the battery again to continue safely.
  
  

Step 6: Reassemble the Headlight and Panels

6.1 – Seal and secure

• Replace gaskets or seals if they were removed.

• Ensure no dust or debris enters the housing.
  
  

6.2 – Reinstall the headlight

• Slide the unit back into position.

• Reconnect all plugs.

• Tighten the Torx bolts gently.
  
  

6.3 – Refit exterior panels

• Reattach the bumper, fender liner, or trim pieces.

• Wipe down the headlight lens.

• Realign the beam pattern if needed.
  
  

Step 7: Troubleshooting Common Problems

Problem: One side doesn’t light up
Fix: Check connector seating and polarity. Swap boards to see if the problem follows the module.

Problem: Error message on dashboard
Fix: Some kits are error-free; others may need coding or resistors. Clear codes with diagnostic software.

Problem: Moisture or fog inside the lens
Fix: Inspect seals. Replace with OEM gaskets or reseal carefully.

Problem: Flicker or uneven color
Fix: Check adhesive contact and wiring. Make sure both boards are flat and evenly secured.

Problem: Damaged resistor
Fix: Replace the board — it can’t be repaired once scraped.

Maintenance Tips

• Inspect the DRL modules annually.

• Keep the headlight lenses clean for maximum brightness.

• Avoid high-pressure washing directly on headlight edges.

• Don’t open the housing repeatedly — adhesive loses strength.

• Check connectors for corrosion once a year.
  
  

A properly installed G87 yellow DRL keeps color and brightness for years.

G87 vs. G42 Yellow DRL Differences

• Both share similar adaptive LED headlight designs.

• The G42 yellow DRL kit may have slightly different cable lengths or mounting tabs.

• Installation steps are nearly identical.

• Modules are interchangeable between both models.
  
  

Owners on BimmerPost have confirmed fitment across both platforms.

FAQs

Do I need to code the car after installing?
No. Most yellow DRL kits are plug-and-play. Some cars might show a temporary bulb-out warning — clear it if needed.

How long does installation take?
Usually 2–3 hours with basic tools. Removing the bumper adds time.

Can I switch back to white DRLs later?
Yes. Reinstall your factory boards anytime.

Are yellow DRLs legal?
Check your local vehicle code. Some areas require white DRLs.

What adhesive should I use?
Thermal adhesive or VHB thermal tape. Regular paste won’t hold. See this install guide (forum) for details.

Why does one side flicker?
Usually a loose plug or uneven contact between the board and heatsink. Reseat and test.

Final Thoughts

Installing a G87 yellow DRL or G42 yellow DRL is a solid weekend project. It adds a bold CSL-style look while keeping OEM fit and function.

Go slow, use the right materials, and test before sealing. If you run into issues, check the G87 yellow DRL installation thread or other BMW lighting forums for help.

For more OEM-fit LED options, visit BayOptiks’ LED lighting collection.