Brother has obstacles for the use of aftermarket cartridges.
Following standard industry wide practice, Brother has installed software/hardware in their printers to block the use of aftermarket or refilled printer cartridges.
You can not simply pull out an empty Brother toner cartridge and replace it with an aftermarket cartridge and expect your printer to work. At least that was my experience. The Brother software would not remove the empty toner message.
There are many solutions posted on the web explaining how to get a printer to work with after-market cartridges. Some required you to take the cartridge apart and re-assemble it, others explained how to re-program the software. I didn't feel comfortable taking screws and springs out of the cartridges and I could get none of the re-programing options to work.
It took three calls to the Brother "help" line and 3 different tech reps before I found one who understood the problem and got the printer to work. One hung up on me, I hung up on one, and the third time was the charm, total elapsed time on phone 4 hours.
If you're willing to put up with the hassle, these cartridges work fine and cost 1/6 original equipment. The print quality is equal to original equipment and I suspect they will last as long if not longer than "genuine Brother supplies".
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Verified purchase: Yes | Condition: New