LaserJet M4345XS

The LaserJet M4345XS was HP's solutions-configured M4345 — the mid-2000s monochrome all-in-one packaged for offices with particular workflow needs. Whatever software and finishing the configuration added, the printing engine stayed the proven family design, and it takes a single black cartridge: the 45A (Q5945A). A maximum-yield compatible alternative, the 45X (Q5945X), gives packaged-solution fleets a longer-running fill of the same cartridge.

Solutions configurations tend to live in fleets: several machines, set up the same way, in offices that expect supplies to be just as standardized as the machines. The M4345XS supports that expectation by sharing its cartridge with the entire 4345 and M4345 range, so one stock line covers every unit a fleet runs. When a cartridge is finally ordered, there is no per-machine code to check — the family fitting is the same throughout.

Toner Cartridges for LaserJet M4345XS

The versions of the cartridge sold for this machine are set out below.

Cartridge	Version	Color	Page Yield
Q5945A	Standard black cartridge	Black	See product page
Q5945X	Maximum-yield black cartridge	Black	See product page
Q5945A	Premium-quality black cartridge	Black	See product page
Q5945A	MICR black cartridge for check printing	Black	See product page
Compatible black cartridge	Listed under this model’s name	Black	See product page

Which cartridge should you buy?

Fleet logic favors the maximum-yield Q5945X: when several shared machines draw from the same stock cupboard, the longer-running cartridge reduces both change frequency and order frequency across the whole fleet. A single lightly used XS can stay on the standard Q5945A, with the premium-quality version available where a higher build tier is preferred. Reserve the MICR cartridge for a machine that actually prints checks. The listing sold under this model's name is the same fitting in another wrapper — standardization is safe whichever listing your purchasing routine picks.

Chip, toner and everyday use

The M4345XS displays a toner-low or replace-toner message as the cartridge nears empty, which gives a fleet manager time to route a spare before the machine stops. Treat that warning as the start of the countdown, not the end: output usually continues for a while, but a shared machine should never be left to discover empty on a deadline. Each cartridge's chip is read on installation to confirm the type and track level, so fit replacements firmly. Store the fleet's spares sealed and flat in one known place, and rock a cartridge gently before fitting it to level the toner.

Frequently Asked Questions

Which toner cartridge does the LaserJet M4345XS use?

The HP Q5945A in standard form, with premium-quality and MICR versions also sold here. The maximum-yield Q5945X fits the same machine and runs longer between changes.

Does the LaserJet M4345XS warn me before the toner runs out?

Yes — it shows a toner-low or replace-toner message as the cartridge nears empty, so you get advance notice. Keep a spare Q5945A on hand so a deadline job never catches the machine without toner.

Standard or maximum-yield for a shared fleet machine?

Maximum-yield, in most cases. On shared machines the cost of a cartridge change is the interruption, and the Q5945X simply changes less often. Standard fills suit a machine with one light user.

What does the premium-quality version change?

It is the same Q5945A cartridge code and the same fitting, produced to a premium quality standard. The printer cannot tell the difference in use; the choice is about the build tier you prefer to buy.