Summary

Replacement plastic cap for the rear wiper arm.

Cannot purchase the plastic cap without buying the whole rear wiper assembly from the dealer.  Me being the cheap bastard that I am says hell no, I have a 3D printer and I can design and print one for a lot cheaper. 
Print with brim to prevent from warping, no support needed.

Print Settings

Printer Brand: 

Creality

Printer:                      

Ender 3

Rafts: 

No

Supports:                      

No

Resolution: 

200

Infill:                      

does not matter

Filament:

Esun PETG                Black                    
                        

Notes:                     

Double sided tape not necessary but recommended.