As an Amazon Associate I earn from qualifying purchases.Updated: March 18, 2026
The Water Filter in your Keurig K-Classic is a charcoal filter that removes impurities from your tap water before brewing, improving the taste and quality of your coffee. Over time, the filter's effectiveness diminishes, requiring periodic replacement. Delaying replacement can lead to reduced coffee flow, off flavors, and potential damage to your machine.
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Function: The Water Filter removes chlorine, sediment, and other impurities from your water, resulting in better-tasting coffee.
Signs it needs replacing: Reduced coffee flow, changes in taste, or a noticeable decrease in brewing speed may indicate a worn filter.
OEM vs aftermarket: Keurig offers original equipment manufacturer (OEM) filters, but reputable third-party brands also produce compatible filters. Aftermarket options are often more affordable.
Installation: Installation is typically straightforward and involves simply removing the old filter and inserting a new one into the designated compartment.
Replacement schedule: every 2 months
Compatibility warning: always verify part number matches your exact model before ordering
Pros & Cons
Pros
✓ Restores device to original performance without buying a new unit
✓ Significantly cheaper than a full device replacement
✓ Multiple options available from OEM and aftermarket sellers
Cons
✗ OEM parts cost more than third-party alternatives
✗ Wrong part number will not fit — model verification is essential
Common Use Cases
Scheduled maintenance: replacing on the every 2 months schedule
Performance restoration after noticing reduced output or efficiency
Preventive replacement before a worn part causes secondary damage
Who Should Buy This
This replacement Water Filter is ideal for Keurig K-Classic owners (model K55) whose coffee maker is experiencing reduced performance or altered taste due to a worn filter. Replacing the filter can extend the life of your machine and restore its original brewing quality.
Not ideal for: If your Keurig K-Classic is experiencing more serious malfunctions beyond just a worn filter, such as electrical issues or significant leaks, it may be time to consider replacing the entire unit.
Good to Know Before Buying
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Always confirm your exact model number (K55) before ordering. Part numbers vary between model variants and production years. Check the label on your device or original documentation to be sure.
Frequently Asked Questions
What is the part number for the Keurig K-Classic Water Filter?
The part number is 05073. Always verify this matches your exact model (K55) before ordering, as similar models may use different parts.
How often should I replace the Water Filter on my Keurig K-Classic?
every 2 months
Will aftermarket Water Filter replacements work in my Keurig K-Classic?
Third-party parts are widely available and often cheaper than OEM. Look for listings that specifically mention compatibility with model K55 and check buyer reviews for fit confirmation before purchasing.
Prices change frequently. See the latest deal on Amazon.