What Is This Part? The Bambu Lab extruder unit is an original OEM replacement for P1P and P1S printers. This P1 series extruder assembly pushes filament from the PTFE tube into the hotend. It is the core component that makes extrusion possible. Stainless Steel + POM Gear Design The P1P extruder replacement features a stainless steel driving gear paired with a POM driven gear (the yellow part you see). The stainless steel driving gear provides strong extrusion force and prevents filament slipping – especially important for TPU and flexible filaments. The POM driven gear offers self-lubricating properties, reducing friction and noise during printing. This combination delivers reliable, quiet operation. Built-in Filament Break Detection Nothing ruins a print like returning to a printer that has been "air printing" for hours. This Bambu Lab extruder unit includes an integrated filament break detection sensor. When the P1 extruder unit with filament sensor detects a broken or exhausted filament, it automatically pauses the print. You load new filament and resume exactly where it stopped. No wasted time. No ruined prints. Signs You Need a Replacement Your P1 series extruder assembly may need replacement if you hear clicking sounds during printing, see under-extrusion with gaps in walls, or experience filament loading failures. After 400 to 500 hours of heavy use, the P1S extruder replacement becomes necessary. The printer may also report filament break errors even when filament is loaded. Wide Filament Compatibility This Bambu Lab extruder unit handles PLA, PETG, ABS, ASA, and TPU reliably. For abrasive engineering filaments like PAHT-CF, PA6-CF, and PET-CF, consider upgrading to the hardened steel extruder gear assembly for extended wear resistance. The P1 extruder unit stainless steel driving gear paired with the POM driven gear is optimized for standard filaments. Who Needs This Spare Part? P1P and P1S owners with a worn extruder. Print farm operators keeping spare units on hand. Heavy users who have printed over 400 hours. Anyone experiencing filament slip or extrusion inconsistency. Users who want to restore their printer to factory performance. Easy Installation Replacing the P1 series extruder assembly takes about 15 minutes. Follow the Bambu Lab official Wiki guide. Important: The replacement P1P extruder unit does not include screws. Keep and reuse the original screws from your existing extruder. What's Included One Bambu Lab extruder unit with stainless steel driving gear, POM driven gear, and integrated filament break detection sensor. Screws not included. Compatibility P1P and P1S only. Not compatible with X1 series, A1 series, or any other printers. Why Choose Original Bambu Lab? Original guarantees factory tolerances. Gear mesh is precise. The filament detection sensor works correctly. Third-party clones may use different materials or omit the sensor entirely. Get Your P1 Series Back to Printing Stop filament slips and undetected breaks. Order your P1S extruder replacement today.