Replacing a Brother toner cartridge takes about five minutes and requires no tools
Open the front panel or access door on your Brother printer — the location depends on your model, but it is usually a hinged panel below the paper tray or on the right side. You will see the toner cartridge sitting in a metal frame called the drum unit. The cartridge is the plastic container holding the black or colored powder. Grasp the green or blue tab on the cartridge and pull it straight toward you. The cartridge will slide out of the drum unit. Do not touch the shiny metal roller inside the drum unit, as oils from your skin can damage it.
Remove the new cartridge from its box and locate the protective tape or seal — usually a long strip of plastic running across the cartridge. Pull this tape straight out in one smooth motion. This tape prevents toner from spilling during shipping. If your cartridge has a plastic cap covering the opening, remove that too. Slide the new cartridge into the drum unit, pushing it in until you hear or feel it click into place. Close the front panel.
Key Takeaways
- Brother cartridges slide straight out of the drum unit by pulling the green or blue tab toward you — no tools needed.
- Always remove the protective tape from the new cartridge before installing it, or toner will not transfer to paper.
- Do not touch the shiny metal roller inside the drum unit, as skin oils can cause print quality problems.
- If your printer shows a toner low warning but the cartridge still has powder, you may need to reset the toner counter through the printer menu.
- Keep the old cartridge for recycling — many retailers and Brother's mail-back program will take it at no cost.
Finding the right cartridge for your specific Brother model
Brother makes dozens of printer models, and each uses a different cartridge. The easiest way to find the correct one is to look at the model number on your printer itself — it is usually printed on the front panel or the back. Write down this number or take a photo.
Go to the Brother support website, enter your model number in the search box, and navigate to the "Supplies" or "Consumables" section. The page will list the exact cartridge part number you need. You can also find this number on the cartridge currently in your printer — it is printed on the side or top. Common Brother cartridges include the TN-420, TN-450, TN-660, and TN-880 series, but your model may use a different one. Buying the wrong cartridge will not fit your printer, so verify the part number before you order.
What to do if the cartridge does not slide out easily
If the cartridge feels stuck, do not force it. First, check that you are pulling the tab in the correct direction — it should slide straight out toward you, not up or down. If the tab tears off before the cartridge moves, you can still remove the cartridge by gripping the sides of the plastic container itself and pulling gently.
If the cartridge still will not budge, the drum unit may need to be reset. Some Brother models lock the cartridge in place if the drum unit has reached the end of its life. The drum unit is separate from the toner cartridge and lasts much longer — typically 15,000 to 30,000 pages depending on the model. If you have replaced the cartridge many times and the printer is now refusing to accept a new one, the drum unit itself may need replacement. Check your printer manual or contact Brother support to confirm whether your model requires a drum unit replacement.
Resetting the toner counter after installation
Some Brother printers display a toner low message even after you install a new cartridge. This happens because the printer counts down from a preset number rather than measuring the actual toner level. To clear this message, you need to reset the counter through the printer menu.
On most Brother models, press the Menu button on the control panel, navigate to "Toner Save" or "Maintenance," and look for an option called "Reset Toner Counter" or "Toner Reset." Select it and confirm. The exact menu path varies by model — your printer manual will show the correct steps. If you cannot find the reset option in the menu, you can also reset it by powering off the printer, holding down a specific button combination (often Menu and Go), and holding it for several seconds until the display changes. Check your manual for the exact button combination for your model, as it differs between models.
Handling the old cartridge and protecting your printer
Do not throw the old cartridge in the trash. Toner cartridges contain materials that can harm the environment, and many retailers and manufacturers offer recycling programs. Brother operates a mail-back program through their website — you can print a prepaid shipping label, pack the cartridge, and send it back at no cost. Staples, Best Buy, and Office Depot also accept used Brother cartridges for recycling.
While you have the front panel open, wipe the inside of the printer with a dry, lint-free cloth to remove any loose toner dust. Do not use water or cleaning solution. If toner powder spills inside the printer, use a dry cloth or a small handheld vacuum with a HEPA filter to clean it up — regular vacuums can spread toner particles into the air. Avoid touching the white or clear plastic parts inside the printer, as they are sensitive to static electricity and oils.
When print quality problems appear after cartridge replacement
If your prints look faded, streaky, or have blank lines after you install a new cartridge, the protective tape may not have been fully removed. Stop and open the front panel again. Pull the cartridge out and check that the plastic tape is completely gone — sometimes a corner gets stuck. Reinstall the cartridge and try printing again.
If the problem continues, the drum unit may be worn out. The drum unit is the metal roller that the toner sticks to before transferring to paper. It wears down over time and eventually needs replacement. If you have printed tens of thousands of pages on the same drum unit, this is the likely cause. You can order a replacement drum unit from Brother or a third-party supplier using the same process you used to find the cartridge — look up your model number and search for "drum unit" on the Brother website.
Frequently Asked Questions
Can I refill a Brother cartridge instead of buying a new one?
Yes, refill kits are sold online and at some office supply stores. They come with toner powder and instructions for opening the cartridge and refilling it. Refills cost less than new cartridges but are messier and carry a small risk of damaging the cartridge if you spill toner inside it. Brother does not recommend refilling, and refilled cartridges may not work with newer printer models that have chip readers.
What is the difference between a cartridge and a drum unit?
The cartridge holds the toner powder and needs to be replaced every few thousand pages. The drum unit is the metal roller that the toner clings to and lasts much longer — usually 15,000 to 30,000 pages. Some Brother models combine them into one unit, while others keep them separate. Check your manual to see which type your printer uses.
Why does my printer say toner low when I just installed a new cartridge?
Brother printers estimate toner level by counting pages printed, not by measuring actual toner. After you install a new cartridge, you need to reset the counter through the printer menu or by holding down a button combination. Your printer manual shows the exact steps for your model.
Is it safe to use third-party or generic cartridges in a Brother printer?
Generic cartridges work in most Brother printers and cost less than official Brother cartridges. They carry a slightly higher risk of leaking or poor print quality, but many users have good results with them. Brother cartridges come with a warranty, while generic ones usually do not. If print quality matters for your work, stick with official cartridges.
Can I print while the cartridge is being replaced?
No. The printer will not operate while the front panel is open. Close the panel completely before trying to print, and wait a few seconds for the printer to recognize the new cartridge and finish its startup cycle.