How to replace Bosch dishwasher sump assembly 00668102

Is your Bosch dishwasher leaking water? Don’t worry, you might not need to call in an expensive repair service. If a cracked sump assembly is the culprit, you can tackle this repair yourself with our step-by-step guide and accompanying how-to video just below.

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If you need to replace the sump assembly in your Bosch dishwasher, you’ll be happy to know that it’s a straightforward repair that you can complete yourself.

The sump assembly sits at the bottom center of the dishwasher and houses the circulation and drain pumps. It also supports the lower spray arm.

The main reason you would need to replace the sump is if it develops a crack and causes a water leak.

You can find a replacement sump assembly 00668102 here. If you need other replacement parts for your Bosch dishwasher, just enter your model number at AppliancePartsPros.com to find them. It’s that easy! Most orders arrive in just two business days, and we have thousands of guides to show you how to install your new parts.

Watch the full repair here

What you need

• 5/8-inch open-end wrench
• 5/16-inch nut driver
• Phillips screwdriver
• Torx T20 screwdriver
• Small flat-blade screwdriver
• Needle nose pliers
• Replacement sump assembly (make sure it’s compatible with your specific model BEFORE installing)
• Small container to catch water
• Towels to absorb leaks
• Gloves to protect hands

Keep safety first

When working on any appliance, remember to keep safety first. Here are some tips to keep in mind:

• Always power off and unplug your appliance or switch off the circuit breaker before you attempt any maintenance or replacement work. This keeps you safe by preventing any risk of electric shock.
• Turn off the water supply at the outlet before beginning repairs. Keep towels ready to catch any residual water in the system when removing parts.
• If the appliance has recently been used, give it plenty of time to cool down before working on it.
• Take your time while working to prevent accidents and personal injuries. Rushing is the enemy of precision.
• Work in a well-lit area so you can clearly see and access appliance parts.
• Keep your workspace free of clutter and other obstacles. Keep children and pets away from the work area.
• Never work on internal parts with wet hands. Make sure the work area is completely dry.
• Check the user manual to see if there are specific installation or safety instructions related to your appliance or replacement part.
• Be gentle when handling or removing parts. Excessive force might damage the appliance or cause personal injury.
• Wear insulated work gloves to protect your hands from sharp metal parts and debris.
• When working with wires, avoid touching any exposed wires or terminals. If you need to touch a wire, use a non-conductive tool or wear insulating gloves to prevent electrical shock.
• Consider wearing safety glasses and/or a dust mask when working with chemicals, dust or a large amount of debris to prevent irritation or injury.

READ MORE: How Long Do Dishwashers Last? With 10 Tips to Keep Your Dishwasher in Great Shape

How to replace the sump assembly

Step 1: Remove the dish racks

1. Turn off the dishwasher and unplug it from the power outlet.
2. Turn off the water supply to the dishwasher.
3. Pull out the lower dish rack until it detaches from the side rails, then lift it out of the dishwasher tub.
4. Pull out the upper rack until it detaches, then lift it up and out.
5. Set both racks aside.

Step 2: Detach the dishwasher from the countertop

1. Find the two Phillips screws along the top front edge that hold it in place.
2. Use a Phillips screwdriver to remove the screws.
3. Pull the dishwasher away from the cabinets. Don’t pull too far since the hoses and wiring still need to be disconnected.

Step 3: Disconnect water and drain lines

1. Disconnect the water supply line on the right side.
2. Use a 5/8-inch open-end wrench to unscrew the line from the dishwasher’s water inlet valve.
3. Find the drain hose, then loosen the hose clamp with a 5/16-inch nut driver and detach the hose. Have a towel ready to catch any water still in the hose.

Step 4: Remove the outer door panel

With the lines detached, you can start taking apart the dishwasher’s outer parts to get to the sump.

1. Remove the three Torx T20 screws at the bottom of the door panel.
2. Use a flat-blade screwdriver to pry off the touchpad panel above the door handle.
3. Open the dishwasher door.
4. Remove the four Torx screws across the top of the inner door.
5. Remove the two slightly shorter side screws.
6. Detach the outer door panel by sliding it upward. Let it rest on top of the open door for now.

Step 5: Detach the inner door panel

1. Remove the six remaining Torx screws holding the inner panel to the outer. (You only need to remove four screws to let the panel hang loose.)
2. Disconnect the touchpad wiring and allow the control panel to hang down safely.
3. Lift off the outer door panel.

Step 6: Remove the dishwasher from the cabinets

1. Tilt the dishwasher forward to access the two screws along the back of the bottom.
2. Remove the screws with a Torx driver.
3. Carefully pull the dishwasher out and feed any wiring or drain hoses still attached through at this point. You may need to temporarily detach the wiring to completely remove the unit.
4. Lay the dishwasher on its back.

Step 7: Detach door springs and cables

With access to the underside, you can now detach the door springs and cables. The door needs to be removed so you can remove the outer tub.

1. Use needle nose pliers to detach the spring cables from the door hinges on both sides.
2. Slide off the cable guide sleeves from the mounting posts.
3. At the bottom, use pliers to unscrew the tension adjusters counterclockwise until the cables detach.

Step 8: Remove the bottom panel and insulation

Underneath the dishwasher, find an access panel held on with two Phillips screws. Remove both of these.

Now you can access and remove the insulation and support bracket.

READ MORE: What is Dishwasher Insulation and Why is it Important?

Step 9: Remove the dishwasher tub

Now you can separate the tub from the cabinet.

1. Lift the two release tabs on either side of the bottom and slide the tub off. This will free up the sump assembly.
2. Set the dishwasher upright so you can access the old sump.

Step 10: Remove the spray arm and filter

1. Reach into the tub and detach the lower spray arm by lifting it off the mounting.
2. Remove the filter basket.

Step 11: Disconnect the wiring and hoses

Underneath the dishwasher, you’ll find all the wiring and drain hoses connected to the sump assembly. These need to be disconnected.

1. Remove the three wiring plugs.
2. Use a small flat-blade screwdriver to release the locking tabs on each connector.
3. Detach the drain hose from the sump outlet.
4. Slide up the locking collar with a flat-blade screwdriver.
5. Disconnect the water inlet housing by releasing the locking tab with a screwdriver.

Step 12: Remove the circulation motor

1. Release the wiring plug and slide off the hose clamp.
2. Remove the motor by releasing the locking tab and rotating it counterclockwise. Set it aside.

Step 13: Detach the turbidity sensor

1. Find the turbidity sensor (the round part protruding from the side).
2. Carefully release the locking tab on the sensor with a flat-blade screwdriver.
3. Rotate the sensor counterclockwise to unscrew it from the sump.

Step 14: Remove the old sump assembly

1. Remove the four Torx T20 screws that hold the assembly in place.
2. Carefully maneuver the sump to detach it from the inlet tube.
3. Remove the drain pump and suction cap attached to the old sump. You’ll need to transfer these parts to the new assembly.
4. Take a few minutes to clean away any grime or debris around the sump mounting area.

READ MORE: Dishwasher is Leaking Water: Top 6 Reasons and Fixes

Step 15: Install the new sump assembly

1. Transfer the drain pump and suction cap from the old sump assembly to the new one.
2. Apply a small amount of dish soap to the o-ring seal on the new sump so it can slide into place more easily.
3. Align the sump assembly into the mounting holes and inlet tube opening.
4. Replace the four Torx T20 screws to secure the sump and tighten them.
5. Reinstall the turbidity sensor by inserting it into the port and rotating it clockwise until it’s secure.
6. Reattach the circulation motor and make sure the hose lines up properly.
7. Replace the hose clamp.
8. Reconnect all the wiring plugs and drain hoses to the corresponding ports on the new sump.

Step 16: Reinstall the tub assembly

1. Carefully lift the dishwasher tub and slide it into the outer cabinet. The release tabs should click into place when it’s seated.
2. Replace the insulation and access panels underneath.
3. Reconnect any wiring you detached earlier.

Step 17: Reattach the door

1. Use pliers to reattach the door cables to the tension adjusters.
2. Replace the door cable guide sleeves on their mounting posts.
3. Use pliers to attach the cables back onto the door hinges.
4. Remount the inner door panel with the original Torx screws.
5. Reconnect the touchpad wiring plug.
6. Replace the outer door panel by sliding it down over the inner panel.
7. Insert and tighten all the original Torx screws to secure the outer panel.

READ MORE: How to Troubleshoot a Dishwasher Door that Opens Too Fast

Step 18: Reinstall the dishwasher

1. Set the dishwasher upright and slide it back into the cabinet opening. Feeding any hoses and wires back through.
2. Tip the dishwasher backward to install the two screws into the bottom rear mounts.
3. Open the door and replace both the upper and lower dish racks.
4. Fasten the two Phillips screws along the top front edge to secure it to the cabinets.

Final steps

1. Attach the drain hose and tighten the hose clamp.
2. Screw the water supply line into the inlet valve.
3. Plug the dishwasher back into the electrical outlet.
4. Turn on the water supply for the dishwasher.
5. Run a test cycle to make sure the dishwasher works correctly and check for leaks.

More information

Thanks for reading! We hope this article helped you replace the sump assembly in your Bosch dishwasher.

If you still need some replacement parts, grab your model number and head over to AppliancePartsPros.com. We offer over two million parts and most orders arrive in two business days. If you need some help with finding the right part or placing an order, you can contact our team at 1 (877) 477-7278.

While you’re waiting for your new part to arrive, you can explore our DIY blog and watch thousands of video tutorials on our YouTube channel. We can also help you troubleshoot common dishwasher problems here.

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