Bambu Ships X1 Firmware After 238 Days: What Is In It
Published · Applies to X1, X1C and X1E
Short version
On August 4, 2026, Bambu released 01.12.00.00 for the X1 and X1C and 01.03.00.00 for the X1E. It is the first firmware for the series since December 10, 2025, a gap of 238 days, and it lands four months after the line was discontinued. The build carries security fixes, better purge chute pile-up detection, and on the X1C a farm-mode improvement. Install it. Security fixes are not something to sit out, and the series is still under Bambu's support commitment through May 2027.
What actually changed
The X1 and X1C build (01.12.00.00) lists four items. Bambu's own wording is terse, so here is what each one means in practice.
- Security updates. Described only as "essential security updates" with no detail, which is normal for Bambu. This is the part that makes the update non-optional.
- Purge chute pile-up detection. When purged filament piles up during a print, the toolhead now moves to a safe position instead of continuing over the pile. That prevents the classic mess where purge waste welds itself to the hotend.
- Farm operation. After a farm print job finishes, plate clearing can now be confirmed directly on the device screen rather than through the farm software. Small, but it removes a step for anyone running several machines.
- Nozzle mismatch bugfix. Starting a print from files stored in the machine's own memory could incorrectly report a nozzle type mismatch. Fixed.
The X1E build (01.03.00.00) is the same wave, minus the farm-mode item: security fixes and the purge chute detection.
Why a discontinued printer is getting updates
Bambu retired the entire X1 line on March 31, 2026, with the X2D as the successor. End of life, however, was never announced as end of support. When Bambu pulled the plug, it committed to spare parts for years and to firmware fixes through May 2027.
Between December and August, that commitment was just a sentence on a support page. Eight months of silence is long enough that a reasonable owner would start to wonder. This release is the first hard evidence that the promise has substance, and it delivers slightly more than promised: a farm-mode improvement and a bugfix are maintenance in the generous sense, not the bare minimum.
What this does not mean
The X1 series is not un-discontinued. You still cannot buy one new, the X2D is still the successor, and you should still expect patches rather than features for the remaining nine months of the support window. What changed is the confidence level: the support commitment is being honoured, not quietly dropped.
Should you install it
Yes, and without waiting. Our general advice on firmware is to give major version jumps a week in case a feature wave ships regressions, but that logic does not apply here. This is a maintenance build for a frozen platform, the feature surface barely moves, and the security portion is the whole point. There is nothing to gain by sitting it out.
One caveat that applies to every Bambu firmware update since the January 2025 Authorization Control change: if you run LAN mode or third-party software, read the release notes before updating, because firmware can alter how external tools reach the printer. Background in What is Bambu Connect.
Where this leaves the lineup
For the first time in months, the X1C is not the stalest machine in Bambu's range. That title now belongs to the H2D, which has gone 156 days without an update, followed by the P1 series at 129 days. A discontinued flagship currently sits on fresher firmware than three actively sold printers.
Current versions and the gap for every model: firmware tracker. Full context on the end of life and what it means for owners: The X1 Series Is Discontinued.