L-31MMW Lucas Lighting 31mm Festoon LED Interior Bulbs White – CANBUS (Pair)

Lucas Lighting L-31MMW 31mm Festoon LED Interior Bulbs White – CANBUS Pair

Upgrade your vehicle's factory interior lighting with the Lucas Lighting L-31MMW 31mm Festoon LED Bulb Pair. Designed as a direct replacement for compatible 31 mm festoon-style halogen bulbs, these LEDs provide a brighter, whiter, instant-on lighting upgrade for interior and other festoon applications.

The Lucas Lighting L-31MMW is designed for CANBUS-equipped vehicles to help prevent common bulb-out errors and is available as a pair for applications that use two festoon bulbs.

The 31 mm size is compatible with a wide range of factory bulb numbers, including 3022, 3175, 6428, 7065, DE3021, DE3021LL, DE3022, DE3022LL, DE3175, DE3175LL, and 31MMW. Always verify the original bulb size and part number before ordering.

Key Features

• Lucas Lighting L-31MMW
• 31 mm festoon-style LED bulb
• Sold as a pair – 2 bulbs
• Direct replacement for compatible 31 mm festoon bulbs
• Brighter output than conventional halogen festoon bulbs
• Bright white LED illumination
• Instant-on operation
• Designed for CANBUS vehicle systems
• Helps avoid common bulb-out errors
• Ideal for interior and other compatible festoon applications
• Useful for dome, map, under-dash and license-plate lighting
• Longer-lasting LED technology compared with traditional halogen bulbs
• Compact festoon-style replacement design

31mm Festoon LED Bulb Replacement

The L-31MMW is designed around the common 31 mm festoon bulb size.

Lucas Lighting lists the following bulb styles as compatible with its 31 mm festoon:

• 3022
• 3175
• 6428
• 7065
• DE3021
• DE3021LL
• DE3022
• DE3022LL
• DE3175
• DE3175LL
• 31MMW

If your original bulb matches one of these numbers or measures approximately 31 mm between the festoon contact points, the L-31MMW may be the appropriate replacement. Always confirm the original bulb and physical dimensions before ordering.

Upgrade Your Interior Lighting

Factory halogen interior bulbs can produce a relatively dim, warm-colored light. The Lucas Lighting L-31MMW provides a brighter white LED appearance that can make the vehicle's interior easier to see.

These festoon bulbs are commonly used for:

• Dome lights
• Interior courtesy lights
• Map lights
• Under-dash lights
• Trunk and cargo-area lights
• Glove-box lighting
• License-plate lights
• Other compatible festoon applications

Lucas specifically identifies its festoon LED bulbs as being commonly used for dome, under-dash, and license-plate lighting.

CANBUS Compatible

Modern vehicles can monitor the electrical load of their factory bulbs and may display a bulb-out warning when a lower-draw LED replacement is installed.

The Lucas Lighting Festoon series is designed for CANBUS systems to help avoid bulb-out errors, making the L-31MMW a convenient upgrade for many modern vehicles.

CANBUS compatibility does not guarantee compatibility with every vehicle, however. Electrical systems vary, so a small number of applications may still require additional load management.

Bright White LED Output

The L-31MMW replaces the traditional halogen festoon bulb with LED technology for a brighter, cleaner white appearance.

LED technology also provides instant-on illumination, eliminating the warm-up effect associated with traditional incandescent or halogen bulbs.

This makes the L-31MMW particularly useful for interior lighting where a brighter, more modern appearance is desired.

Direct Replacement Design

The L-31MMW uses the familiar festoon-style design found in many factory interior lighting applications.

Installation is straightforward:

1. Turn off the vehicle's interior lights.
2. Remove the original festoon bulb.
3. Verify the original bulb length and contact configuration.
4. Install the Lucas L-31MMW.
5. Test the bulb before reinstalling the light housing.

If the LED does not illuminate, remove it and rotate/reinstall it to reverse polarity before testing again.

Always allow the original bulb to cool before removal.

Quick Specifications

What's Included

• 2 × Lucas Lighting L-31MMW 31 mm Festoon LED Bulbs

Important Fitment Information

Please verify your original bulb size before ordering.

Festoon bulbs are available in multiple lengths that can look very similar but are not interchangeable. Lucas Lighting offers its Festoon LED bulbs in 31 mm, 36 mm, 39 mm, and 42 mm sizes.

The L-31MMW is specifically the 31 mm version.

If your original bulb is a different length, choose the corresponding Lucas festoon size instead.

FAQ

What size is the Lucas L-31MMW?

The L-31MMW is a 31 mm festoon LED bulb.

Is the L-31MMW sold individually?

No. Lucas Lighting sells the Festoon LED bulbs as a pair of two bulbs.

Is the L-31MMW CANBUS compatible?

Yes. Lucas Lighting designed its Festoon LED bulbs for CANBUS systems to help avoid bulb-out errors.

What bulbs does the L-31MMW replace?

Lucas lists compatibility with 3022, 3175, 6428, 7065, DE3021, DE3021LL, DE3022, DE3022LL, DE3175, DE3175LL and 31MMW bulb styles.

Where can I use a 31 mm festoon LED bulb?

Common applications include dome lights, interior lights, under-dash lights, cargo areas, glove boxes and license-plate lights. Exact applications depend on the vehicle.

Will these fit every 31 mm festoon application?

Not necessarily. The physical bulb length is only one part of fitment. The original bulb style, contact arrangement and available space should also be verified.

Are these brighter than factory halogen festoon bulbs?

Lucas Lighting describes its Festoon LEDs as brighter than the halogen bulbs they replace, with white LED output and instant-on operation.

Do LED festoon bulbs turn on instantly?

Yes. LED technology provides instant-on illumination.

What if my vehicle shows a bulb-out warning?

The L-31MMW is designed for CANBUS systems to help avoid bulb-out errors. If a particular vehicle still reports an error after installation, additional load-management equipment may be necessary depending on the vehicle's electrical system.