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Borderlands 4
Sum of His Parts Walkthrough
☆ How Rush Saved Mercenary Day (Bounty Pack 1)
★ 12 active SHiFT Codes as of December 4, 2025
☆ Black Market Location
★ Elemental Weakness Chart
☆ Legendary Weapons
★ Builds: Vex | Amon | Rafa | Harlowe
This is a walkthrough for the Sum of His Parts side mission in Borderlands 4. Read on to follow the objectives and clear the mission.
| ◀ Previous Mission |
|---|
| No Place Like Home |
List of Contents
How to Unlock Sum of His Parts
Complete No Place Like Home
You need to complete the No Place Like Home side mission first before unlocking Sum of His Parts.
Once unlocked, you can start the side mission by talking to Claptrap's eye in Racketrun, located southwest of Idolator's Noose. Claptrap's eye will be in the dumpster.
No Place Like Home Walkthrough
Sum of His Parts Walkthrough
| List of Objectives | ||
|---|---|---|
| 1 | Find Claptrap's Chassis | |
| 2 | Go to Old Scrapper's House | |
| 3 | Return to Claptrap | |
Find Claptrap's Chassis
| # | Walkthrough |
|---|---|
| 1 |  Once you've accepted the mission, Claptrap will ask you to find the rest of his body. Head southeast of Racketrun to the flower garden, where you'll find Claptrap's chassis has been turned into a flower pot. |
| 2 |  Destroy the flower on the chassis, and Redthumb will appear to attack you. Kill him to proceed. |
| 3 |  After defeating Redthumb, take Claptrap's chassis and return to the workshop near where you found his eye. Place the chassis on the table. |
| 4 | Grab Claptrap's eye from the dumpster and place it on the chassis to reassemble him. |
Go to Old Scrapper's House
| # | Walkthrough |
|---|---|
| 1 |  Head west to Rattlehead Crest and knock on the old scrapper’s house. Be ready, as you will have to fight enemies along the way! |
| 2 |  Climb the tower next to the house using your grappling hook and take the antenna at the top. |
| 3 |  Once the old scrapper’s house is open, enter and grab Claptrap's arms. The first arm will be in the bucket in front of the TV, and the second will be on the nearby table. |
| 4 |  Continue to the back of the house and jump down to the beach village. Claptrap's wheel will be at the south end of the area, where it's being used as a treadmill. Take the wheel and return to Claptrap. |
Return to Claptrap
| # | Walkthrough |
|---|---|
| 1 | With all parts collected, interact with Claptrap to reattach his arms, give him a high five, and place the wheel below him. |
| 2 |  Follow Claptrap outside, where you'll encounter Lootin' Luke and his gang. Kill them all to proceed. |
| 3 | After killing Lootin' Luke and his gang, follow Claptrap to his junk. Talk to him to complete the mission and claim your rewards. |
Sum of His Parts Rewards
| Side Mission Rewards | |
|---|---|
| Base Reward | ・EXP ・Cash ・Eridium |
| Equipment Reward | ・Shotgun (Green to Purple Rarity) |
| Cosmetic Reward | ・Bargain Hunter (ECHO-4 Paintjob) |
Borderlands 4 Related Guides
List of Side Missions
Comment
Author
Sum of His Parts Walkthrough
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