The pump in a Bosch dishwasher is a crucial component responsible for the proper drainage of water from the dishwasher. It plays a vital role in ensuring that the dirty water from the dishwasher is efficiently pumped out, leaving your dishes clean and ready for the next cycle. The pump in a Bosch dishwasher is specifically designed to handle the task of draining water effectively. It is usually located at the bottom of the dishwasher, beneath the sump and filter area. When the dishwasher is running, the pump activates, creating a suction force that draws the water from the dishwasher’s interior and pushes it out through the drain hose.

Replacing the Bosch dishwasher pump involves the process of removing the old, malfunctioning pump and installing a new one. This task is essential if you’re experiencing drainage issues with your dishwasher or if the pump has become faulty over time.

Types of Pumps in Bosch Dishwashers

Checking a Drain and Circulating Pump in a Dishwasher
Dishwasher Pump Parts

There are typically two types of pumps found in Bosch dishwashers:

  1. Drain Pump: This pump is responsible for removing the dirty water from the dishwasher during the drainage cycle. It is activated at the end of each wash cycle to ensure that all the used water is expelled from the dishwasher.
  2. Circulation Pump: The circulation pump is responsible for circulating water during the wash and rinse cycles. It propels water through the spray arms, allowing it to reach all the dishes and utensils inside the dishwasher, ensuring thorough cleaning.

Step-by-Step Guide on How to Replace the Bosch Dishwasher Pump:

Step 1: Prepare the Dishwasher

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How to Install a Dishwasher

Step 2: Remove Front Panel and Access Panel

  • Remove the three lowest screws on both sides of the door.
  • Tilt the dishwasher back for better access and remove the front decorative panel.
  • Use a screwdriver to undo the two screws holding the service access panel.
  • Pry open the access panel and remove the sound insulation for easier access.

Step 3: Remove the Old Drain Pump

How To Replace a Dishwasher Pump Motor
How to Replace a Dishwasher Drain Pump
  • Use a screwdriver or your finger to remove the overflow channel. Press on the tab to release the drain pump and turn it clockwise.
  • Carefully remove the drain pump from its position.

Step 4: Inspect and Clean

  • Inspect the drain pump chamber for any foreign objects or debris.
  • Use a soft cloth to wipe the drain pump chamber clean before installing the new pump.

Step 5: Install the New Pump

Whirlpool Dishwasher Replace Pump and Motor Assembly
Replacing the Drain Pump on a Dishwasher
  • Fit the new drain pump in its place firmly, ensuring all tabs catch on securely.
  • Twist the pump anti-clockwise until you hear a click, indicating it’s properly locked.

Step 6: Reassemble the Dishwasher

  • Reconnect the power plug for the drain pump and secure the wiring harness into the harness clip.
  • Refit the overflow channel and place the sound insulation back in its place.
  • Finally, reattach the service access panel and the front decorative panel.

Step 7: Test the Dishwasher

  • Power on the dishwasher and check if it’s draining properly.
  • Once verified, put back any other components you removed, such as the front panel and kick panels.

Frequently Asked Questions

Can I replace the drain pump without professional help?

Yes, replacing the drain pump is a DIY-friendly task, but make sure to follow safety precautions and guidelines.

How often should I replace the drain pump in my Bosch dishwasher?

The drain pump in Bosch dishwashers is durable and long-lasting. Replacement is usually necessary if it’s malfunctioning or damaged.

Are there any troubleshooting steps before replacing the pump?

How to Check and Clean Drain Pump Filter
Ensure there are no clogs in the drain hose and the filter is clean

Ensure there are no clogs in the drain hose and the filter is clean. If the issue persists, proceed with replacing the pump.

Where can I find a suitable replacement drain pump?

You can purchase genuine Bosch dishwasher parts from authorized dealers or online retailers.


By following these simple steps, you can easily replace the drain pump in your Bosch dishwasher. Remember to take safety precautions and always refer to your dishwasher’s manual for specific instructions. Now you can say goodbye to drainage issues and enjoy spotless dishes once again!

Key Points

  • Tilt the dishwasher slightly for better access, but keep it flat during the process.
  • Remove the front panel and access panel to reach the drain pump.
  • Carefully remove the old pump and inspect the chamber for debris.
  • Install the new pump securely, twisting it anti-clockwise until it clicks in place.
  • Test the dishwasher after reassembling to ensure it’s draining correctly.

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