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Original Prusa i3 MK3/S to MK3S+ upgrade kit

Upgrade kit for the Original Prusa i3 MK3/S to Original Prusa i3 MK3S+. With this upgrade, we are introducing the SuperPINDA and a number of small changes. X and Y axes have slightly improved plastic parts and u-bolts were changed to metal clips which are easier to mount. A number of minor changes were done to the extruder plastic parts to improve overall reliability.

You will need this upgrade in case you are using MK3 and planning to buy the MMU2S.

Otherwise, if your MK3/S runs without any issues, you will not gain any significant printing quality improvements.

Not compatible with

This product is supplied as a kit - you must assemble it by yourself!

Printed parts are NOT included! Please print them before you disassemble your MK3/S! (Filament is included in the upgrade package, STL files and assembly instructions are available below)

If your printer is out of order and you can not print the upgrade parts yourself we also offer them separately MK3/S to MK3S+ upgrade plastic parts

This product includes:


19 reviews
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rayner benjamin2 months ago

This is a great upgrade.I’ve already updated a MK3 using this kit. I’m ordering another to upgrade my MK3s.It’s a bit fiddly but if you have a bit of patience & problem solving skillz the walk though docks help you succeed.Haha 😛 these other 1star wnk reviews should be ignored. Don’t buy if you don’t like playing with Lego and don’t have a spare evening to upgrade.If people wanted the extruder already built you would be paying x3 as much or more.

Libby Nate3 months ago

Completely unimpressed that they put the fact that no printed parts are included after all the other product info. You won’t see it till you scroll on a phone, even a PC. One star because that’s deceptive and it makes no sense that they don’t offer an option to buy the printer parts.

Libby Nate3 months ago

A great kit ruined by Prusa cheating their loyal fans. Prusa has changed. Customers used to be the focus. The absence of the printed parts at this price is ridiculous, to not offer them at an additional price is outrageous. Hey Prusa, Printers aren’t always working and when that happens, it’s a good time to upgrade! Thanks for making this harder. I am really disappointed with Prusa.

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