Lexmark 55B6000 Black Toner Cartridge (MS331 / MS431 / MX431 / MX432)
The Lexmark 55B6000 is a genuine Lexmark black toner cartridge rated for a 3,000-page yield, built for the Lexmark MS331, MS431, MX431 and MX432 monochrome laser printer series.
Compatibility
Check your printer's model number before ordering — it's usually printed on the front panel or shown in the printer's settings menu. This cartridge is designed for:
- Lexmark MS331 series
- Lexmark MS431 series, including MS431dn and MS431dw
- Lexmark MX431 series, including MX431adn and MX431adw
- Lexmark MX432 series
The dn, dw, adn and adw suffixes refer to duplex, wireless and network-finish variants of the same base model — they all take this cartridge.
Specs
- Cartridge type: Genuine Lexmark, Return Program cartridge
- Colour: Black
- Page yield: 3,000 pages
- SKU: 55B6000
- Pack quantity: 1 toner cartridge
What's included
One 55B6000 black toner cartridge, ready to install — no separate drum or imaging unit included.
Why this is the right pick
This is a genuine Lexmark part, not a rebranded or generic substitute, so it's built to the exact specification your printer expects — consistent print density and no risk of triggering a "non-Lexmark supply" warning on the printer display. If your MS331, MS431, MX431 or MX432 is due for a black toner change, 55B6000 is the correct part number to order.
Is the Lexmark 55B6000 compatible with my printer?
Yes, if your printer is a Lexmark MS331, MS431, MX431 or MX432. Check the model number on your printer's front panel to confirm before ordering.
Is this a genuine (OEM) Lexmark cartridge or compatible/remanufactured?
It's a genuine Lexmark cartridge, sold under Lexmark's Return Program — not a third-party compatible or remanufactured substitute.
What does "Return Program" mean?
It's Lexmark's own scheme: the cartridge is single-use and returned to Lexmark for recycling instead of refilled. It's new stock, not used or refurbished.
How many pages will the 55B6000 print?
It's rated for approximately 3,000 pages. Actual count varies with print content and coverage.
Will this fit my MS431dw, MS431dn, MX431adn or MX431adw?
Yes. These are duplex, wireless and network variants of the same MS431 and MX431 models, and all use this cartridge.
What's the difference between OEM, compatible, and remanufactured toner?
OEM is made by the printer brand. Compatible is new, third-party-made. Remanufactured is a used OEM cartridge that's been refilled and resold.
How do I find my printer's exact model number?
Check the front panel or top cover of the printer — the model (e.g. "MS431dw") is usually printed there, or listed under Settings > About.
Will my printer show a warning if I use this cartridge?
No. As a genuine Lexmark cartridge with the correct chip, it's recognised normally and won't trigger a "non-Lexmark supply" warning.
