551X
Compatible Lexmark 551X Black High Yield Toner Cartridge (55B1X00)
20,000 pages
$239.99
Save 33% vs genuine
Lexmark MS431dw toner
Your MS431dw takes the 551X (high yield) and 551H (high yield). At our price that is about 1.2¢ a page.
The Lexmark MS431dw is a mono laser printer in the MS431 series, which shares cartridges across 2 models.
It takes 2 cartridges: the 551X and 551H.
When you compare prices, compare cost per page rather than the sticker price: a cheaper cartridge with half the rated yield costs more to run. Every cartridge here ships free, is covered by our printer damage protection and can be returned within 90 days, opened or not.
Cartridges that fit
551H
Compatible Lexmark 551H Black High Yield Toner Cartridge (55B1H00)
15,000 pages
$229.99
Save 38% vs genuine
Which yield is worth it
| Cartridge | Yield | Price | Per page |
|---|---|---|---|
| 551X High yield | 20,000 pages | $239.99 | 1.2¢ |
| 551H High yield | 15,000 pages | $229.99 | 1.5¢ |
What it costs you a month
About $9.66 a month in toner, roughly one 551X every 3 months.
Questions about the MS431dw
What toner does the Lexmark MS431dw use?
The 551X and 551H. Lexmark lists these cartridges as compatible with this model, and the yields on this page are Lexmark's published figures.
Does using a compatible cartridge void the MS431dw warranty?
No. Under the Magnuson-Moss Warranty Act a manufacturer cannot void your warranty because you used a third-party cartridge. If one of ours damages the printer, our printer damage protection covers the repair.
Other Lexmark MS431 models
Most of these share the same cartridges. Check the model page to be sure.
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Page updated Sep 22, 2026. Compatibility checked by Dan Whitaker, Print Technician. Brand names and part numbers are used only to identify compatibility. We are not affiliated with or endorsed by any printer manufacturer.