BMW M4 2021 Bulb Size
Bulb size chart
This page helps you verify bulb sizes for the 2021 BMW M4 by lighting position, so you can match the correct bulb to each exterior and interior lamp without guessing. Because the M4 uses LED lighting in many locations, it is especially important to confirm the exact lamp type before ordering replacements or planning a retrofit.
For the 2021 BMW M4, the bulb chart below organizes common positions such as headlights, fog lights, brake lights, turn signals, license plate lights, and cabin lights. That makes it easier to find the right fit for a specific light location, whether you are replacing a failed bulb or checking what is installed on your car.
Fitment can vary by trim, market, body style, and lighting package, so always compare the bulb position on your vehicle with the chart before buying. Many exterior lamps on this M4 are LED, while some interior locations use replaceable bulb types such as 2825, 98, or 2723. If your car has been modified with aftermarket LED conversions, the installed part may not match the original equipment listing, so it is smart to inspect the existing bulb or housing before purchase. When in doubt, remove the old bulb and verify the marking on the base, especially if you are replacing a glove box light, vanity mirror light, or any lamp that may differ from one market to another.
FAQ
What bulb sizes does the 2021 BMW M4 use for the headlights?
The 2021 BMW M4 page lists both the low beam and high beam headlight bulbs as LED. That means the headlight assemblies are not shown here with a separate replaceable halogen bulb size.
Are the fog lights on the 2021 BMW M4 LED?
Yes. The front fog light bulb is listed as LED for the 2021 BMW M4.
What is the brake light bulb type on this model year?
The brake light bulb is listed as LED on the 2021 BMW M4.
Does the 2021 BMW M4 use LED turn signals?
Yes. Both front and rear turn signal light bulbs are listed as LED for this year and model.
What bulb is used for the license plate lights?
The license plate light bulb is listed as LED on the 2021 BMW M4.
Are the daytime running lights LED on the 2021 BMW M4?
Yes. The daytime running light bulb is listed as LED.
What about the reverse lights and tail lights?
The back up reverse light bulb and the tail light bulb are both listed as LED on this vehicle.
Which interior bulbs are replaceable on the 2021 BMW M4?
The chart shows several interior positions, including trunk or cargo area light, dome light, map light, interior door light, stepwell light, glove box light, and vanity mirror light. Some of these use replaceable bulb types, while others are listed as LED.
What bulb sizes are listed for the glove box and vanity mirror lights?
The glove box light bulb is listed as 2825, 98, and the vanity mirror light bulb is listed as 2723.
Can trim or package differences change the bulb fitment?
Yes. Trim, lighting package, market, and body style can affect the exact bulb setup on the 2021 BMW M4, so it is important to confirm the lighting position on your specific vehicle.
Should I check the installed bulb before ordering?
Yes. Checking the installed bulb is the safest way to confirm fitment, especially for interior lights and any lamp that may have been changed previously with an aftermarket part.
Can I replace an LED bulb with a halogen bulb on this car?
Not usually. Many of the listed exterior lights on the 2021 BMW M4 are LED assemblies, so a direct halogen swap is often not a simple plug-in replacement.
What should I know before buying aftermarket LED replacements?
Aftermarket LED conversions can differ in size, connector style, brightness, and error compatibility. Verify the installed bulb and the housing design before ordering to avoid fitment problems.