The DD97-00509A is the genuine OEM upper spray arm rotor assembly for Samsung dishwashers. The upper rotor sits at the top of the dishwasher tub and spins to distribute water pressure through the upper spray arm, ensuring dishes on the top rack and in the cutlery basket get a thorough, high-pressure wash. When the rotor cracks, warps, or its bearing wears out, water distribution becomes uneven — leaving dishes on the upper rack cloudy, greasy, or still dirty after a full cycle.

✓ Model-Specific Repair Pages

Don't see your model? Contact us and we'll confirm compatibility.

The DD97-00509A rotor assembly uses a precision bearing hub that allows the spray arm to spin freely under water pressure. Over time, mineral deposits, debris, or physical impact can seize the bearing or crack the rotor body, reducing spray arm rotation and cutting water coverage to the upper rack. This OEM replacement restores full rotation and spray coverage to factory specification.

✓ Common Symptoms Fixed

Dishes on the top rack not getting clean | Upper spray arm not spinning or rotating slowly | Cloudy or greasy residue on glasses and bowls | Dishwasher running full cycle but top rack items still dirty | Visible cracks or damage to the upper rotor assembly | Spray arm wobbling or loose during operation

✓ Key Features & Specifications

Genuine Samsung OEM part – guaranteed fit, no modifications required | Precision bearing hub for smooth, full-speed spray arm rotation | Durable construction resistant to mineral deposits and high-temperature wash cycles | Direct replacement – snaps into place without tools | Compatible with select Samsung dishwasher models

✓ Buying Options

New / OEM: The DD97-00509A is the current genuine Samsung OEM upper spray arm rotor. This is the exact part used in factory assembly and is the recommended replacement for restoring full upper rack wash performance.

✓ Replacement Part Numbers

DD97-00509A (current OEM)

✓ Installation Tips

No tools required for this repair. The upper rotor assembly typically snaps or screws onto the centre post at the top of the dishwasher tub. Remove the upper rack by sliding it out, then unscrew or unclip the old rotor from the centre post. Before installing the new rotor, flush the spray arm ports with warm water to clear any mineral deposits. Snap or thread the new rotor onto the post, confirm it spins freely by hand, and reinstall the upper rack. Run a test cycle and check that the upper spray arm rotates during the wash. Repair difficulty: 1/5. Estimated time: 5–10 minutes.

✓ Compatible Models

Verify your Samsung dishwasher model number before ordering. Contact us with your model number and we'll confirm compatibility.

✓ Frequently Asked Questions

How do I know if my upper rotor needs replacing? Remove the upper rack and spin the upper spray arm by hand. It should rotate freely with minimal resistance. If it's stiff, seized, or wobbles, the rotor bearing has failed. Also inspect the rotor body for cracks. See our Dishwasher Not Cleaning Dishes guide for a full diagnostic walkthrough.

Is this the same as the upper spray arm? No — the DD97-00509A is the rotor hub assembly that the spray arm mounts onto and spins around. If the spray arm itself is cracked or clogged, that is a separate part. If the arm spins but dishes are still dirty, check the spray arm ports for blockages first before replacing the rotor.

Is this a difficult repair? This is one of the easiest dishwasher repairs — rated 1/5 difficulty. No tools are required and most repairs take under 10 minutes. Contact us if you need help identifying the correct part for your model.

Does mineral buildup cause rotor failure? Yes — hard water mineral deposits are a leading cause of rotor bearing seizure. If you live in a hard water area, running a dishwasher cleaner monthly can extend the life of spray arm components. See our Dishwasher Not Cleaning guide for maintenance tips.