Because garbage disposal manufacturers integrate the electric motor directly into a sealed grinding chamber housing rather than selling motors as separate replacement parts, you cannot replace just the motor; you must replace the entire disposal unit. Purchasing a new replacement disposal unit typically costs between $150 and $450 depending on horsepower and brand quality. Professional plumbing installation adds an additional $150 to $300 in labor fees if you choose not to DIY. Verification: Check under the sink for leaks and verify horsepower specifications before buying a replacement unit.
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