We did that with the 3040CN. After 30,000 pages, it wanted us to replace "some" mechanical parts (drums, I think?) which were as expensive as the printer itself… as was each pack of toners.
Now we're running a Ricoh gel printer. Higher print quality, more features (duplex for free), cheap ink that doesn't dry out, comparable price for the printer itself, and less/no parts to replace regularly. And no half-assed "you need this undocumented 32 bit binary" wannabe CUPS driver like with Brother. Single PPD file, done.
just buy a damn laser printer.
Sincerely, a fellow Brother laser printer owner