ELEGOO Mars 4 Ultra: problems, parts and running costs

Checked: 2026-10-16

Summary

The Mars 4 Ultra is a compact enclosed 9K resin printer aimed at miniatures. Owners most often report first-layer adhesion and leveling trouble, Wi-Fi file-transfer failures and support failures that commenters link to a worn ACF release film. Keeping one running means resin, 99% isopropyl alcohol, release film and a replacement LCD screen, but the sources give no owner-paid part prices, so a yearly total cannot be computed. ELEGOO’s US store lists it at $299.99 with a 27% discount badge as of October 2026.

Common problems and fixes

First-layer adhesion and leveling trouble — the most repeated owner complaint, including a first-time owner reporting “an issue with the bed leveling” and another thread titled “prints won’t stick”; the manual says to level with the leveling card before first use. [8][9][6]
Wi-Fi file-transfer failures — an owner reported being unable to send files after months of use; ELEGOO’s wiki lists weak signal, band compatibility, a loose antenna, special characters in the SSID or password, MAC filtering and module failure as causes, and suggests a 2.4G first test and a hotspot test. [11][7]
Support failures — an owner thread on supports failing includes a commenter suggesting a worn ACF release film as the cause; the manual says to replace the film if it whitens, scratches or loses elasticity. [10][6]

Parts and consumables

Resin tank and build plate — covered for 6 months in the US; the vat holds 400 ml. [5][3]

Yearly running cost

Not enough data. [3][5]

When it is a good buy

ELEGOO US store, October 2026: $299.99 with a 27% discount badge; the EU store lists €239.00, reduced from €299.00. [1][13]
At or under $250 it is a strong buy for miniature work; $251–300 is fair-to-good; above $300 it is hard to justify while the Mars 5 Ultra sits at $259 on ELEGOO’s own site. [12]
Reviewer street prices were about $310 in August 2023 (Goonhammer) and $335.97 in June 2024 (NikkTech). [4][3]
ELEGOO Mars 5 Ultra is the better choice when it is priced below the Mars 4 Ultra, since it shares the 18 µm class with a larger feature set at $259. [12]