Original Prusa MK4S support

Original Prusa MK4S support

Firmware 6.5.7

June 19, 2026

Download
Changelog

PrusaSlicer 2.9.6

June 30, 2026

Handbook 1.01

October 23, 2024

Assemble the Original Prusa MK4S

1. Introduction2. Frame assembly3. X-axis & X-carriage assembly4. Z-axis assembly5. Nextruder assembly6. xLCD assembly7. Y-carriage & Heatbed assembly8. Preflight checkManual changelog

Original Prusa MK4S kit assembly

9 chapters
Moderate
Begin assembly

Upgrade to MK4S from MK4

1. Introduction2. Upgrading the Y-axis3. Upgrading the xLCD4. Upgrading the Nextruder4B. Upgrading the Nextruder (MMU3)5. Upgrading the connectivity6. Preflight checkManual changelog

Original Prusa MK4/MK3.9 to MK4S/MK3.9S upgrade

8 chapters
Moderate
Begin assembly

Upgrade to MK4S from MK3/MK3S/MK3S+

1. Introduction1a. Parts check1b. Printer disassembly1c. Parts preparation2. Frame assembly3. X-axis & X-carriage assembly4. Z-axis assembly5. Nextruder assembly6. xLCD assembly7. Y-carriage & Heatbed assembly8. Preflight checkManual changelog

Original Prusa i3 MK3/MK3S/MK3S+ to MK4S/MK3.9S upgrade

12 chapters
Moderate
Begin assembly

Get started with Original Prusa MK4S

First print with PrusaSlicer

First print with PrusaSlicer

If you are using PrusaSlicer for the first time to generate a gcode or bgcode for printing, you can follow the steps below. Click on the links to get more information about the…

Prusa Connect and PrusaLink explained

Prusa Connect and PrusaLink explained

Prusa Connect and PrusaLink are two remote printing solutions developed in-house by Prusa. Its origin is in the management system used in our record-sized print farm located in…

How to update firmware (CORE One L, CORE One, CORE One INDX, MK4/S, MK3.9/S, MK3.5/S, XL)

How to update firmware (CORE One L, CORE One, CORE One INDX, MK4/S, MK3.9/S, MK3.5/S, XL)

On the Prusa CORE One L, Prusa CORE One/+, Prusa CORE One/+ INDX, Original Prusa MK4/S, MK3.9/S, MK3.5/S, and XL, the firmware is flashed using a USB flash drive. This is valid…

Shipping information

Shipping information

Current lead time estimates for new orders Updated: December 10th, 2025 --> The dates are only an estimation…

Fix common issues

QR Error codes

QR Error codes

This is an advanced system for displaying error screens, providing more useful information to the user. In case of an issue, the printer will display the name of the error followed…

Changing or replacing the Prusa Nozzle

Changing or replacing the Prusa Nozzle

Replacing the Prusa Nozzle on your printer varies depending on the model of your printer. This article provides an overview of the different methods to replace the Prusa Nozzle,…

Warping

Warping

When printing large objects, you can sometimes run into an issue with the corners of the object being lifted from the bed – mostly when printing with high-temperature materials…

Community posts

Bed leveling issues (I think)
JeanPierre
  • 1 reply
ugly z seam, how to reduce it?
Neophyl
  • 4 replies
MMU3 - to much energy on the MMU
Dave Hammer
  • 3 replies
Doesn't do automatic unloading of filament at end of print anymore
Kwanner
  • 2 replies
MK4S bed leveling constantly failing, all tests OK
lberstein
  • 1 reply

Still need help?

Get support

We are here for you 24/7 all year round. If you can not find what you are looking for, please do not hesitate to contact us.
Contact us