42X
Compatible HP 42X Black High Yield Toner Cartridge (Q5942X, Q1338A, Q1339A, Q5945A)
20,000 pages
$59.99
HP LaserJet M4345x MFP toner
Your LaserJet M4345x MFP takes the 42X (high yield). At our price that is about 0.3¢ a page.
The HP LaserJet M4345x MFP is a mono laser printer.
The cartridge it takes is the 42X, rated by HP at about 20,000 pages, which works out to roughly 0.3¢ a page at our price of $59.99.
On this printer the drum is built into the cartridge, so there is no separate drum to buy or reset. Every new cartridge brings a fresh drum with it.
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
What it costs you a month
About $9.66 a month in toner, roughly one 42X every 3 months.
Questions about the LaserJet M4345x MFP
What toner does the HP LaserJet M4345x MFP use?
The 42X. HP lists this cartridge as compatible with this model, and the yields on this page are HP's published figures.
Does using a compatible cartridge void the LaserJet M4345x MFP 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.
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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.