Dishes Coming Out Dirty? Your LG Dishwasher’s Lower Spray Arm Is Failing — Replace It with AGM30057101

When the lower spray arm in your LG dishwasher cracks, clogs, or stops spinning, the bottom rack stops getting cleaned. Food residue, grease, and hard water deposits build up fast — and no amount of re-running cycles fixes a broken arm. The OEM AGM30057101 (supersedes AGB73932401) restores full water distribution and gets your dishwasher cleaning like new again.

Symptoms of a Failed Lower Spray Arm

• Bottom rack dishes coming out dirty or with food residue
• Visible cracks, chips, or warping on the spray arm
• Spray arm not spinning freely during cycle
• Reduced water pressure or uneven spray pattern
• Clogged nozzles that won’t clear with cleaning
• Grinding or rattling noise from the bottom of the dishwasher

Part Details

• OEM Part Number: AGM30057101
• Supersedes / Replaces: AGB73932401
• Brand: LG
• Type: Dishwasher Lower Spray Arm
• Options: Genuine OEM (New) or Used condition available
• Compatible Models: LDP7708ST/00, LDP7708BD/00, LDT7797BD/00, LDP6797WW/00, LDP6797BD/00, LDP6797BM/01, LDP6810SS/00, LDP6797ST/00, LDP7808BD/00, LDT7797ST/00

Installation Notes

• Skill Level: Beginner — no tools required in most models
• Safety First: Disconnect power before reaching into the dishwasher tub for any inspection
• Removal: Lift and twist the spray arm counterclockwise to unlock from the centre hub; reverse to install new arm
• After Install: Spin the arm by hand to confirm it rotates freely before running a cycle

Compatible Models

LDP7708ST/00, LDP7708BD/00, LDT7797BD/00, LDP6797WW/00, LDP6797BD/00, LDP6797BM/01, LDP6810SS/00, LDP6797ST/00, LDP7808BD/00, LDT7797ST/00

Verify your model number (found on the door jamb label) before ordering. Contact us if you need help confirming compatibility.

✓ Model-Specific Repair Pages