How To Fix Brother Toner Cartridge Leaks (Common Issues)


Quick Answer:

Fixing a leaking  Brother toner cartridge usually depends on different factors, but often, replacing it is necessary due to potential damage or wear.

Even if immediate replacement isn't required, having a new cartridge on hand is smart.

Identify the Cause

The first step in fixing a leaking toner cartridge is to understand why it's happening. 

Common reasons include:

  • Damaged Cartridges: Cracks or holes in the cartridge can lead to leaks.
  • Improper Installation: An incorrectly seated cartridge can cause toner to escape.
  • Overfilled Cartridges: Overfilling a cartridge beyond its capacity is a surefire way to cause leaks.
  • Wear and Tear: Regular use can lead to wear and tear, eventually causing leaks.

Steps To Fix a Leaking Brother Toner Cartridge

Now that you understand the potential causes, here are the steps to rectify the situation:

➜ For Damaged Cartridges

  • Carefully remove the cartridge from the printer.
  • Inspect the cartridge thoroughly for any visible signs of damage, such as cracks, holes, or broken parts.
  • If you find any damage on the cartridge, it is recommended to replace it.
  • Before installing the new cartridge(s), clean any toner that has leaked inside the printer. Use a dry, lint-free cloth to gently wipe away the toner. This step helps prevent any residual toner from damaging the printer or affecting future print quality.
  • Opt for a genuine original Brother toner cartridge as a replacement and carefully install it into the printer.


When you find a leaking toner cartridge, you might wonder if it's genuine. But remember, both authentic and non-authentic cartridges can leak. A leak doesn't mean the cartridge is counterfeit. If you're unsure about your cartridge's authenticity, the Brother Authentication Tool can help confirm whether it's genuine.

For more details read our guide: Counterfeit Brother Toners: How To Spot and Avoid Them

➜ For Improper Installation

  • Turn off the printer before handling internal parts.
  • Open the printer cover and remove the toner cartridge.
  • Gently wipe any toner residue from the cartridge and printer slot with a soft, dry cloth.
  • Check the cartridge and slot for any debris or obstructions.
  • Reinsert the toner cartridge, aligning it according to the printer's guide, until it clicks into place.
  • Wiggle the cartridge slightly to verify it's securely fitted and doesn't move.
  • Close the printer cover, turn on the printer, and perform a test print to check proper installation and function.

➜ For Overfilled Cartridges

It's important to note that while refilling toner cartridges can be cost-effective, it's not always safe for your printer and can lead to issues like leaks. 

Here's how you can address the situation with overfilled cartridges:

  • Gently tap the overfilled cartridge over a waste bin to remove excess toner. Be cautious to avoid spreading toner dust around.
  • Carefully reinsert the cartridge into the printer, making sure it's correctly installed and secured in place.

➜ For Wear and Tear

  • Examine the cartridge closely to assess the extent of wear and tear. Look for signs such as faded prints, streaks, or inconsistent print quality that could indicate the cartridge is nearing the end of its life.
  • Decide on the condition of the cartridge. If the wear is minor and the print quality is still acceptable, you might continue using it for a bit longer. However, be prepared for a potential decline in print quality.
  • If the wear is significant, consider replacing the cartridge.

How To Replace Brother Toner Cartridges


Brother toner cartridge leaks can occur due to different factors. 

Understanding these causes and taking appropriate action is crucial for maintaining your printer's longevity and print quality. 

Make sure to handle toner cartridges properly and follow the manufacturer's guidelines whenever necessary.

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