2024 International MV Bulb Size Guide

Quick Reference

*Note: The International MV offers both halogen and full LED headlamp assemblies depending on trim level and optional equipment. For vehicles equipped with LED headlights from the factory, the individual bulbs are not replaceable; the entire assembly must be replaced if a component fails.

The 2024 International MV continues the tradition of robust and reliable commercial trucking, and its lighting system is no exception. Depending on the specific configuration and trim level of your MV, you'll find a mix of traditional halogen bulbs and modern LED lighting. Understanding these differences and knowing the correct bulb sizes is crucial for proper maintenance and upgrades.

For the headlighting system, the International MV can come equipped with either a standard halogen setup or an advanced full-LED system. Halogen-equipped models will typically use H11 for low beams and 9005 for high beams. The fog lights, if present, commonly utilize H10 bulbs. However, many MVs are now optioned with complete LED headlamp assemblies, where the low beam, high beam, DRL, and sometimes fog lights are integrated LED units. In these cases, individual bulbs are not serviceable, and the entire headlamp assembly would need replacement if a light source fails. The Daytime Running Lights (DRL) are almost always integrated LED units on the 2024 models.

Moving to the turn signals, both front and rear typically use 3157/4157NALL (front amber) and 3157/4157RLL (rear red) type bulbs. These are dual-filament bulbs serving both the turn signal and sometimes a parking light function. The brake and tail lights often share the same 3157/4157RLL bulb for dual functionality. Reverse lights are commonly 921 bulbs, providing bright white light for backing up.

Smaller utility lights include the license plate lights, which typically take a 194 bulb, a common wedge-base bulb. Side marker lights, both front and rear, also use the 194 bulb. Inside the cabin, for dome and map lights, you'll often find a 578/4410 festoon-style bulb, though some newer configurations may feature integrated LED cabin lighting.

LED vs Halogen Upgrade Considerations

Upgrading from halogen to LED bulbs in your International MV can offer significant advantages, including brighter illumination, longer lifespan, and improved energy efficiency. However, it's important to consider a few factors before making the switch.

CANBUS Errors: Modern commercial vehicles like the International MV utilize a Controller Area Network (CANBUS) system to monitor various electrical components, including lights. Halogen bulbs draw more power than LEDs, and when you install an LED conversion kit, the lower power draw can be misinterpreted by the CANBUS system as a "bulb out" error. This can trigger dashboard warning lights or cause hyper-flashing of turn signals. To prevent this, you