Lexmark MX421 Supplies
Toner Cartridges, Maintenance Kits and Parts
12 Items
Lexmark 56F000G
Black Genuine Government Toner Cartridge 6,000 pages
Lexmark 56F1X00
Black Genuine Toner Cartridge Extra High Yield, 20,000 pages, Return Program
Lexmark 56F0XA0
Black Genuine Toner Cartridge Extra High Yield, 20,000 pages
Lexmark 56F0X0G
Black Genuine Government Toner Cartridge Extra High Yield, 20,000 pages
Lexmark 56F1X0E
Black Genuine Toner Cartridge Extra High Yield, 20,000 pages
Lexmark 56F1H00
Black Genuine Toner Cartridge High Yield, 15,000 pages, Return Program
Lexmark 56F0H0G
Black Genuine Government Toner Cartridge High Yield, 15,000 pages
Lexmark 56F1H0E
Black Genuine Toner Cartridge High Yield, 15,000 pages
Lexmark 56F1000
Black Genuine Toner Cartridge Standard Yield, 6,000 pages, Return Program
Lexmark 56F0ZA0
Black Genuine Imaging Unit 60,000 pages
Lexmark 56F0Z00
Black Genuine Imaging Unit 60,000 pages, Return Program
Lexmark 56F0Z0E
Genuine Imaging UIT Standard Yield, 60,000 pages
Frequently Asked Questions
The MX421 uses 9 toner cartridges, including LEX 56F1H00, LEX 56F1X00 and LEX 56F0XA0.
LEX 56F1000 prints 6000 pages, LEX 56F1X00 prints 20000 pages. Choose LEX 56F1X00 for high-volume printing (lower cost per page); LEX 56F1000 costs less upfront for occasional use.
The LEX 56F1X00 cartridge has an approximate yield of 20000 pages.
Yes — the MX421 uses a replaceable imaging drum: LEX 56F0ZA0, LEX 56F0Z00, LEX 56F0Z0E.
If your MX421 displays a "Supply Problem" alert, it's almost always the cartridge chip not being read correctly — not a faulty cartridge. Switch the printer off for about 30 seconds, take the cartridge out and slot it back in firmly, then wipe the small metal chip contacts with a dry, lint-free cloth. Still showing the alert? Install a fresh LEX 56F1X00 or reach out to our support team.