Borderlands 4: Complete Guide to Legendary Class Mods and Their Locations

In the expansive universe of Borderlands 4, acquiring legendary class mods for your character stands out as one of the most significant achievements. These coveted items enhance each Vault Hunter’s skills, allowing players to devise powerful builds capable of overwhelming the Order.

However, due to their legendary status, obtaining these class mods is no easy feat. Players often need to defeat formidable bosses, primarily those lurking within the vaults.

Overview of Legendary Class Mods

This guide will provide a comprehensive breakdown of the legendary class mods available for each Vault Hunter in Borderlands 4.

Harlowe’s Legendary Class Mods

As a key character in Borderlands 4, Harlowe is known for her powerful class mods that elevate her capabilities, often enabling players to create builds suited for boss farming.

Class Mod	Boss	Location	Requirements	Bonuses
Driver	Origin	Arch of Origo Vault	Collect all Vault Key Fragments in Terminus Range.	Enhances CHROMA Accelerator, providing 20% lifesteal upon firing.
Bio-Robot	Idolator Sol	Indomitable Fortress	Complete the Rush the Gate quest in the Fadefields.	Creates alternate cry and radiation hazards when entangling enemies with the action skill.
Generator	Vile Lictor	Umbral Foundry	Finish the His Vile Sanctum quest in Terminus Range.	Boosts action skill power by 200% while reducing duration.
Scientist	Radix	Arch of Radix Vault	Collect all Vault Key Fragments in Carcadia Burn.	Shocking an enemy envelops them in electricity, chaining damage to others.
Skeptic	Ripper Queen Callis	Moon-Called Throne	Complete the Her Flaming Vision quest in Carcadia Burn.	Activating status effects on enemies allows for cooldown reduction.

Vex’s Legendary Class Mods

In Borderlands 4, Vex specializes in commanding minions and sustaining life through various enhancements.

Class Mod	Boss	Location	Requirements	Bonuses
Avatar	Initiation	Arch of Inception Vault	Find all Vault Key Fragments in the Fadefields.	Boosts damage for you and your minions based on attunement skills.
Illusionist	Ripper Queen Callis	Moon-Called Throne	Complete the Her Flaming Vision quest in Carcadia Burn.	Provides a chance for your minions to become badasses, increasing their stats.
Technomancer	Idolator Sol	Indomitable Fortress	Complete the Rush the Gate mission in the Fadefields.	Eldritch Blast inflicts ordnance damage and resets upon kills.
Teen Witch	Radix	Arch of Radix Vault	Find all Vault Key Fragments in Carcadia Burn.	Applies lifesteal to shields when at max health.

Rafa’s Legendary Class Mods

Rafa’s legendary mods significantly extend the durations of his action skills and may prevent charges from being consumed.

Class Mod	Boss	Location	Requirements	Bonuses
Buster	Origin	Arch of Origo Vault	Collect all Vault Key Fragments in Terminus Range.	Apophis Lance has a chance to not consume charges when used.
Dancer	Idolator Sol	Indomitable Fortress	Complete the Rush the Gate quest in the Fadefields.	Increases Overdrive bonuses by 100% while active.
Fencer	Ripper Queen Callis	Moon-Called Throne	Complete the Her Flaming Vision quest in Carcadia Burn.	Boosts critical hit chance for melee attacks, restoring skill duration.
Philanthropist	Initiation	Arch of Inception Vault	Collect all Vault Key Fragments in the Fadefields.	Retriggering your action skill spawns an additional grenade.
Grenazerker	Radix	Arch of Radix Vault	Find all Vault Key Fragments in Carcadia Burn.	Throwing grenades or Tediore guns launches extras.

Amon’s Legendary Class Mods

Amon’s class mods are designed to augment his Forgedrones, amplifying both gun damage and affinity skills.

Class Mod	Boss	Location	Requirements	Bonuses
Blacksmith	Vile Lictor	Umbral Foundry	Complete the His Vile Sanctum quest in Terminus Range.	Restores duration for each active Forgedrone upon securing a kill.
Elementalist	Initiation	Arch of Inception Vault	Collect all Vault Key Fragments in the Fadefields.	Stacking an affinity skill benefits all unlocked affinity skills.
Forge Master	Radix	Arch of Radix Vault	Gather Vault Key Fragments in Carcadia Burn.	Allows forgeskills to be activated even while on cooldown.
Furnace	Idolator Sol	Indomitable Fortress	Complete the Rush the Gate quest in the Fadefields.	Converts certain damages to incendiary types, enhancing firepower.
Shatterwight	Origin	Arch of Origo Vault	Find all Vault Key Fragments in Terminus Range.	Forgewaves inflict melee damage alongside primary damage types.
Viking	Ripper Queen Callis	Moon-Called Throne	Complete the Her Flaming Vision quest in Carcadia Burn.	Increases charges, duration, and damage reduction for Crucible.