ELEGOO Mars 5 Ultra: problems, parts and running costs

Checked: 2026-10-16

Summary

The Mars 5 Ultra’s main known issues are a leveling sensor whose coiled spring cable wears and throws intermittent “Automatic leveling failed” errors, a reported firmware 1.3.9 boot brick, first-layer adhesion that is either too weak or too strong on defaults, and no built-in resin heater for rooms below 25-30 C. Running costs are the usual resin basket — resin, IPA, gloves and replacement FEP film — with wash-and-cure stations and a cold-room heater as extras, and no yearly total quantified in the sources. At $269 or less it is a strong buy for beginners and miniature printing; near its $349.99 MSRP it weakens against larger-format machines.

Common problems and fixes

Intermittent “Automatic leveling failed” — traced to the mechanical contact sensor’s coiled spring cable, a moving wear part; owners report it as early as the fifth print and straighten the coils with a screwdriver. The “auto leveling” is a spring-and-screw pressure equalizer, not electronic leveling. [5]
First-layer adhesion off out of the box — the laser-etched plate is aggressive, so Tom’s Hardware and VoxelMatters cut first-layer exposure to get prints off, while other owners report layers that never stick until the plate is cleaned with IPA and manual leveling is rerun. [3][4][6][7][9]
Firmware 1.3.9 bricks units at the logo screen — reported, and no source read confirms a later release fixed it; keep the machine on the network and check what version it runs. [5]
No built-in resin heater — ELEGOO’s working range is 25-30 C; owners in unheated rooms around 10 C need external vat heating, and an optional ELEGOO heater mounts in the rear corner. [2][5][8]
AI camera cannot see submerged layers — it has no backlight, so failure detection only begins once a print rises about 50 mm above the vat edge, and it works with ChituBox but not Lychee Slicer. [2][3][4]
Resin leaks past the tilt tray edge — PCMag found a gap where resin can drip into the internal mechanism and called the clip-on drip bib flimsy; owners fit aftermarket covers and drip trays. [2]
New units ignore .ctb and .goo files — a file-format and firmware issue reported on Reddit. [10]
False “Foreign matter detected” alarms — listed in the owner-issue catalog alongside plate-slamming and resin leaking into the tilt assembly. [5]

Parts and consumables

Release film (FEP) — replaced when the ~60,000-use reminder fires, and the box ships a spare hardware set for FEP replacement. [1][2]
Resin tank — sold by ELEGOO US as a spare accessory. [1]
Build plate — sold by ELEGOO US as a spare accessory. [1]
405 nm resin, IPA and gloves — the recurring consumables for any resin printer. [1][2]
Add-on resin heater — needed below 25-30 C and mounted in the rear corner. [2][5]
Wash-and-cure station — a separate purchase; the ELEGOO US Mercury XS bundle lists at $389.00. [11]

Yearly running cost

Not enough data. The sources list the recurring items — resin, IPA, gloves and replacement FEP film — and note that wash-and-cure stations and a cold-room heater are separate purchases, but no yearly total or per-item price is given.

When it is a good buy

At $269.00 or less (ELEGOO US official sale, October 2026) it is a strong buy for beginners and miniature printing. Between $271 and $300 it is fair-to-good if the small 9K footprint matters; from $301 to $350 it weakens as it approaches the $349.99 MSRP, where the same money reaches larger-format machines in ELEGOO’s own Saturn family; above $350, wait for a sale. ELEGOO US also lists it certified pre-owned at $229.99, and the UK official store showed it at £289.00 reduced to £231.00, with 3DJake UK at £256.84. Choose the Saturn family instead when you want a larger build volume at a similar price; choose this small-format 9K machine when 18 um detail and near plug-and-play setup matter more than size.