# Upgrade kit Prusa MK3S+ for Original i3 MK3/S 3D printers — DIY assembly

**URL:** https://aio.lv/en/product--prusa-psa-18734--12091464
**Data updated:** 2026-03-13 09:04 (EET)
**Category:** 3D Printer Consumables
**Manufacturer:** Prusa
**Manufacturer code:** PSA-18734
**EAN:** 5904422368326
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 73.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 61.15 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--prusa-psa-18734--12091464

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

Upgrade kit for Prusa Original i3 MK3 and MK3S 3D printers that adds the MK3S+ configuration. Supplied for self-assembly, the kit contains the parts required to convert or update compatible MK3/MK3S machines to the MK3S+ standard. Intended for users comfortable with mechanical assembly and firmware updates, it preserves printer functionality while providing the manufacturer's specified MK3S+ components.

## Long description

Upgrade kit Prusa MK3S+ for Original i3 MK3/S 3D printers — DIY assembly is a set of replacement and additional components designed to bring Original Prusa i3 MK3 and MK3S machines up to MK3S+ specification. The kit is supplied for self-assembly and contains the mechanical parts and sensors required to achieve MK3S+ compatibility while preserving existing printer frames, electronics and firmware base. This product is intended for users who are comfortable with manual assembly and performing firmware updates to finalize the conversion.
Advantages
The upgrade kit provides manufacturer-specified parts that match the MK3S+ configuration, enabling improved component consistency and interchangeability with other MK3S+ builds. Supplied as a DIY set, it allows targeted conversion of compatible MK3 or MK3S printers without the need to replace the entire machine. The parts are designed to integrate with the Original Prusa ecosystem and maintain core printer functionality when installed according to instructions.
Suitable for
 Owners of Original Prusa i3 MK3 or MK3S seeking to update to MK3S+ hardware features
 Users experienced with mechanical assembly and firmware flashing
 Repair or maintenance tasks where MK3S+ compatible replacement parts are required
 DIY upgrades to extend printer capabilities while keeping existing frame and electronics
Key specifications
 Contents: assortment of mechanical parts and sensors necessary for MK3S+ conversion (supplied for self-assembly)
 Compatibility: Original Prusa i3 MK3 and MK3S models (intended to convert/update to MK3S+ standard)
 Form factor: parts designed to fit the Original Prusa i3 frame and assembly points
 Installation: intended for manual assembly and integration with existing printer electronics and firmware updates
How to use
Follow the manufacturer’s assembly instructions to replace or install the supplied components into an Original Prusa i3 MK3 or MK3S printer. Perform mechanical installation carefully, securing fasteners to specified torques and aligning parts as instructed. After physical installation, update or flash the printer firmware to the MK3S+ configuration where required, and run calibration routines such as axis homing, bed leveling and extrusion calibration to verify correct operation. Testing the printer on simple prints before full production use is recommended to confirm successful conversion.
Usage recommendations
Use this upgrade kit only on compatible Original Prusa i3 MK3 or MK3S machines and ensure you have the necessary tools and firmware files. If unfamiliar with firmware updates or complex mechanical assembly, consult official Prusa documentation or seek assistance from an experienced technician to avoid damage to the printer or suboptimal performance.

## FAQ

### How much does the Prusa MK3S+ upgrade kit for Original i3 MK3/S cost, and is it available for purchase?

The price is 73.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 06.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Prusa MK3S+ upgrade kit for Original i3 MK3/S be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Prusa products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Prusa service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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