A drum cartridge holds toner and transfers it to paper — when yours wears out, you'll see streaks or blank spots on every page

Brother printers use a drum unit that lasts roughly 12,000 to 15,000 pages before it needs replacement. Unlike a toner cartridge, which you swap out when it runs low on powder, the drum is a separate part that wears down from the physical act of rolling across paper thousands of times. When the drum reaches the end of its life, you'll notice vertical lines, faded patches, or spots that won't print no matter how much toner you add.

The good news: replacing a drum is a straightforward task that takes about five minutes and costs between $40 and $80 depending on your printer model. You don't need special tools or technical knowledge. The drum sits inside your printer in a way that makes it impossible to install backwards, so the main risk is just being gentle with the parts.

Key Takeaways

  • Find your exact Brother printer model number on the back or bottom of the machine, then search "[model] drum" to order the correct replacement part.
  • Open the front panel of your printer, remove the toner cartridge first, then slide the drum unit out of its slot and replace it with the new one.
  • Brother drums typically last 12,000 to 15,000 pages, so if you print heavily you may need a replacement every 6 to 12 months.
  • Aftermarket and remanufactured drums cost less than Brother-brand parts but may have shorter lifespans or inconsistent quality.

Identify your printer model and order the right drum

The first step is finding your exact model number. Look on the back of the printer or underneath it — you'll see something like "HL-L8360CDW" or "MFC-L9550CDWT". Write this down or take a photo. Do not assume you know the model from memory; Brother makes dozens of printers and the wrong drum will not fit.

Once you have the model number, search "[your model] drum replacement" on Google or go directly to Brother's parts website. You can also search on Amazon or office supply sites like Staples or Office Depot. The part you want will say "drum unit" or "drum cartridge" — it will not say "toner cartridge". The product listing should confirm it works with your specific model before you buy.

Genuine Brother drums cost more than third-party options. Aftermarket and remanufactured drums (rebuilt used drums) typically run $30 to $50 versus $60 to $80 for new Brother parts. The trade-off is that non-Brother drums sometimes have shorter lifespans or produce lower-quality prints. If you print a lot, a genuine drum may save money over time because you'll replace it less often.

Power down and open the printer

Turn off your Brother printer and unplug it from the wall. Wait 30 seconds. This clears any residual power and gives the internal components time to cool if you've been printing.

Open the front access panel. On most Brother models, this is a hinged door on the front of the machine. Some models have a panel that slides out instead. Consult your printer's manual if you're unsure which part moves — the manual is usually available as a PDF on Brother's support website if you've lost the physical copy.

Remove the toner cartridge before touching the drum

Inside the open panel, you'll see the toner cartridge — a dark plastic box that sits in front of the drum unit. Pull the toner cartridge straight toward you using the handle or grip point. It will slide out without resistance. Set it aside on a clean surface; you'll put it back in after you replace the drum.

Do not shake the toner cartridge or open it. If toner powder spills, it's messy to clean and can damage the printer's internal parts. If you do spill toner, use a damp cloth or paper towel — never a vacuum, which can spread the powder into the air and into your lungs.

Slide out the old drum and install the new one

Behind where the toner cartridge was, you'll see the drum unit. It's a cylindrical part, usually dark gray or black, with a handle or grip point on one or both ends. Grasp the handle and pull the drum straight toward you. It will slide out of its slot. The drum is not fragile, but avoid dropping it or squeezing it hard.

Before you install the new drum, check the protective tape or plastic covering on the new unit. Some Brother drums come with a plastic strip or tape that protects the surface during shipping. If your new drum has this, peel it off now. Slide the new drum into the empty slot, pushing it straight in until you hear or feel it click into place. The drum will only fit one way, so you cannot install it backwards.

Reinsert the toner cartridge and close the panel

Slide the toner cartridge back into the slot in front of the drum. Push it in until it clicks. Close the front access panel. Plug the printer back in and power it on. The printer may display a message about a new drum being installed — this is normal and will clear after a few seconds.

Print a test page to confirm everything is working. If you see streaks, blank spots, or other print quality issues on the test page, the drum may not be seated correctly. Power down, open the panel again, and reseat both the drum and toner cartridge, making sure each one clicks fully into place.

When to replace the drum versus when to replace toner

Your Brother printer tracks drum life separately from toner level. When toner runs low, you'll see a message on the printer's display or in the printer settings on your computer — that's when you replace just the toner cartridge. When the drum wears out, you'll see print quality problems like faded areas or lines, even with a fresh toner cartridge installed.

Some Brother printers display a drum counter that shows how many pages the current drum has printed. You can check this in the printer's menu or in the printer settings on your computer. If the counter shows the drum is near its limit (usually 12,000 to 15,000 pages depending on model), order a replacement now so you have it on hand before print quality drops.

If you print fewer than 500 pages per month, you may only need a new drum once a year. If you print 2,000 or more pages per month, you might need a replacement every few months. Heavy printing wears the drum faster because the surface makes physical contact with paper thousands of times per day.

Frequently Asked Questions

Can I use a non-Brother drum in my Brother printer?

Yes, aftermarket and remanufactured drums work in Brother printers and are cheaper than genuine parts. The downside is that quality varies by manufacturer — some third-party drums produce lower-quality prints or fail sooner than Brother drums. Read reviews before buying a non-Brother drum, and stick with brands that have consistent feedback.

What do I do with the old drum after I replace it?

Old printer drums contain plastic and metal parts and should not go in the trash. Many office supply stores like Staples accept used printer cartridges and drums for recycling at no charge. You can also search "printer cartridge recycling near me" to find local options. Some manufacturers offer mail-back programs where you return the old drum in the box the new one came in.

Why does my new drum still show poor print quality?

If a new drum doesn't fix streaks or faded areas, the problem may be the toner cartridge, not the drum. Try installing a new toner cartridge. If that doesn't work, the printer's fuser unit (the part that heats toner onto paper) may be failing. This is a more complex repair that usually requires a technician.

Is there a way to reset the drum counter after I install a new one?

Most Brother printers reset the drum counter automatically when you install a new drum unit. If the counter does not reset, consult your printer's manual for the reset procedure — it usually involves holding a button on the printer or navigating to a menu option. The exact steps vary by model.

How do I know if I need a drum or just a toner cartridge?

If your printer displays a "toner low" message or the prints look faded but even across the page, you need toner. If you see vertical lines, streaks, or spots that appear in the same place on every page, the drum is likely worn out. You can also check your printer's page counter — if the drum is near its rated lifespan (usually shown in the manual), replace it even if prints still look acceptable.