KitchenAid KSB5-3 blender Parts

A KitchenAid KSB5-3 blender usually leaks because the jar-to-blade seal is worn, the blade assembly is loose, or the sealing surfaces have residue that prevents a tight seal. In most cases, cleaning and reseating the seal fixes it; otherwise, replace the seal or blade assembly.

• Unplug the blender and remove the jar from the base.
• Check that the jar is not cracked and the bottom threads are not stripped.
• Disassemble the bottom (collar and blade area), then wash and dry all mating surfaces.
• Reassemble snugly; do not overtighten (overtightening can distort the seal).
• If the leak only happens with hot liquids, let contents cool slightly before blending.

If cleaning and proper assembly do not stop the leak, these parts are the most likely culprits:

• Seal WP9704204 (flattened, nicked, or hardened)
• Blender dome and blade assembly WP9704291 (worn sealing surface or damage)
• Collar WP9704253 (cross-threaded or not tightening evenly)

A small leak can let liquid reach the drive area and base, which can lead to slipping, odors, and electrical damage over time. Fixing the seal early helps protect the motor and keeps blending performance consistent.

Last updated: February 2026

For the KitchenAid KSB5-3 blender, most removable, non-electrical pieces (like the jar, lid, and some blade assemblies) are typically dishwasher-safe, but the motor base and any electrical parts must never go in the dishwasher. For the safest approach, hand-wash the blade area and keep water away from the base.

• Never dishwasher: motor base, controls, power cord, and anything with wiring
• Usually dishwasher-safe (top rack preferred): jar/pitcher and lid
• Often better hand-washed: blade assembly and sealing surfaces (to protect sharp edges and prevent leaks)

If your blender is leaking after cleaning, the sealing surfaces are the first place to check; the jar seal can get nicked or mis-seated.

1. Fill the jar halfway with warm water.
2. Add 1 to 2 drops of dish soap.
3. Run on low for 10 to 20 seconds.
4. Rinse and air-dry completely.

• Do unplug before cleaning.
• Do keep the underside of the jar and the drive area dry.
• Do remove and rinse food residue right away.
• Don’t submerge the base.
• Don’t use abrasive pads on plastic parts.

If you notice seepage at the bottom of the jar after washing, these parts are the usual suspects:

Dishwashers use high heat and strong detergents; that can shorten the life of seals and dull blades over time. Keeping the motor base dry also prevents electrical damage and intermittent power issues.

Last updated: February 2026

To disassemble the blade on a KitchenAid KSB5-3 blender, remove the jar from the base, protect your hands, then loosen the retaining nut on the underside of the blade assembly. Many KitchenAid blade retaining nuts are reverse-threaded, so you typically turn it clockwise to loosen.

• Unplug the blender base before you start.
• Wear cut-resistant gloves or wrap the blade with a thick towel.
• Work over a towel to prevent the jar from slipping.
• Keep track of small parts so the seal goes back in the same order.

1. Remove the jar from the motor base and empty it.
2. Turn the jar upside down.
3. Hold the blade assembly firmly (use a towel for grip).
4. Loosen the retaining nut or wing nut on the bottom of the blade assembly.

• If it is reverse-threaded, turn clockwise to loosen.

5. Lift out the blade assembly and separate the gasket/seal.

If you’re taking the blade apart because of leaking, wobble, or poor blending, these are the most common wear items for the KSB5-3:

The seal and coupling are designed to wear before the motor does. Replacing a worn seal or drive coupling often fixes leaks and slipping without needing a full blender replacement.

Last updated: February 2026