MB491 Plus

The Okidata MB491 Plus is a configuration variant of the MB491 mono multifunction line, offering the same print, scan, copy and fax capability with a different feature mix. This page stocks the model's standard black cartridge, 44574701, together with a model-named MB491 Plus black cartridge listing of that same cartridge. One caution before you order: the wider MB491 family also lists a high-yield 44574901 and a 44917601 cartridge for this model, and neither is stocked on this page, so the number printed on the cartridge you pull out is the number to match.

Because the Plus is a variant rather than a separate engine, its supplies overlap with the rest of the MB491 family. An office running a Plus next to a standard MB491 is not stocking two different cartridge systems; it is feeding the same black toner family into two machines with different feature sets, which keeps the supply shelf simple.

Toner Cartridges for MB491 Plus

Cartridge	Color	Page Yield
44574701	Black	See product page
44574701 — 3 Pack	Black	See product page
MB491 Plus Black Cartridge (model listing)	Black	See product page
MB491 Plus Black Cartridges — 5 Pack	Black	See product page

Which cartridge should you buy?

Match first, economize second. If the cartridge already in your machine reads 44574701, the single above is the direct replacement, and the 3 pack lowers the cost per cartridge when the machine prints and receives faxes all week. If your installed cartridge instead reads 44574901 or 44917601, reorder that exact part number rather than substituting the standard one — this model accepts more than one black part number, and the machine in front of you is the authority on which one it runs. For light, occasional use, a single standard cartridge is all the commitment you need.

Chip, toner and everyday use

An MB491 Plus earns its keep quietly: incoming faxes print automatically as they arrive, including overnight, so black toner drains even when nobody is in the office. Turning on junk-fax blocking trims that silent consumption. When pages start coming out light near the end of a cartridge, slide it out and tilt it gently side to side to redistribute the remaining toner; that buys a short run of even pages while the replacement ships. Keep the spare sealed and stored flat so it is ready the moment the panel reports empty.

Frequently Asked Questions

What toner does the Okidata MB491 Plus use?

Three black part numbers are listed for this model across its family: the standard 44574701 stocked on this page, plus a high-yield 44574901 and a 44917601. Check which cartridge is currently installed before reordering, because the right buy is the number already in the machine.

Which black toner should I choose for the MB491 Plus?

Choose the part number that matches your installed cartridge first. Within the 44574701 line stocked here, heavy printing, copying and faxing argues for the multipacks, which cut the cost per cartridge and keep a spare ready; light use is served fine by the standard single.

Does the MB491 Plus use toner when it receives faxes overnight?

Yes. A received fax is a printed page, and it consumes black toner exactly like a document you send to print yourself. Offices that receive many faxes feel this in cartridge life, which is another reason the multipacks suit fax-heavy desks.

My pages are coming out light. Is the cartridge finished?

Not always. Toner settles as a cartridge empties, and a gentle side-to-side rock redistributes what remains for a few more usable pages. If the lightness returns quickly or streaks appear in the same place on every page, the cartridge is truly at its end and should be replaced.