How to Replace LG CordZero Vacuum Key Components

This covers the commonly replaced parts on the LG CordZero A9 series, with the LG part numbers you need. Knowing which component to change saves you buying the wrong part.

Tools and parts#

• Tools: none for the user-replaceable parts; a Phillips #2 for nozzle-motor access
• Part: varies by component — see each step for the LG number
• Time: 5-30 minutes depending on the part
• Difficulty: Easy (filters, battery) to Intermediate (brush motor)
• Safety warning: Remove the battery before replacing any component other than the battery itself. For battery replacement, ensure the vacuum is removed from the charging station.

Step 1 — Diagnose before you buy#

Not every problem is a dead part. Short runtime on a full charge is the battery; weak suction with clean filters is a worn seal or gasket; a brush bar that won't spin is the bar or its motor; suction that stays weak after cleaning the filters twice means the filters are worn out (they age out at 12-24 months); and cracked wands, nozzles, or bins are module swaps. If your vacuum is connected, the ThinQ app also reports component status.

Step 2 — Pre-motor filter#

The pre-motor cyclone filter (LG ADQ74774001 on most A9 models) is due when washing no longer restores its color, usually every 18-24 months. Lift the dust bin off the body, twist the cyclone assembly counterclockwise, and pull the dark mesh filter cone. Drop the new one into the cyclone housing and twist the assembly back into the bin to lock.

Step 3 — HEPA exhaust filter#

The HEPA filter (LG ADQ74773909) catches the finest dust on the way out and should be changed every 6-12 months, or when a fresh pre-motor filter still leaves suction weak. Press the release on the rear exhaust compartment, slide the old filter out, and note the airflow arrow — the new one goes in with the arrow pointing toward the exhaust, away from the motor. Close it until it clicks.

Step 4 — Battery pack#

CordZero batteries swap without tools. Press the release button on the front of the body and slide the old pack down, then line the new pack (EAC63382201 standard, or EAC63382202 extended for the A9) up with the guide rails and push it up until it locks. Charge it fully — about 4 hours — before the first use, and let the first few charge cycles calibrate the battery management system.

Step 5 — Brush bar#

Frayed bristles or a bar bent from impact call for a new brush bar (the part number tracks the nozzle model, not the vacuum body). Flip the power nozzle over, slide the red lock tab to release, and lift the bar out. Note that one end has a flat drive spindle and the other a gear coupling: put the new bar in gear-end first into the motor-coupling side, drop the flat end into its bearing well, and slide the red lock back.

Step 6 — Power nozzle assembly#

If the brush motor itself has failed — bar clear of tangles, pins clean, but still no spin — replace the whole power nozzle, since the motor is embedded and not sold on its own. Press the collar release to detach the old nozzle from the wand and push the new one on until it clicks, moving your old brush bar across if it is still good.

Step 7 — Extension wand#

A cracked or dented wand leaks air and saps suction. Press the collar release where the wand meets the body, pull it off, and push the new wand on until it clicks. Test the seal by covering the far end with your palm and running the vacuum briefly — no air should escape at the joints.

Step 8 — Dust bin#

A damaged Kompressor bin — cracked paddle arm, broken latch, or split shell — means a new bin. Press the bin release, pull the old bin, and move the cyclone filter assembly across (it is shared within a model series). Snap the new bin on until it clicks and check that the Kompressor paddle and the bottom lid both move freely.

When to call a professional#

Get help if the motor assembly needs replacing (housing teardown and internal cabling), if the main board has failed (ribbon cables and precise connectors), if you cannot pin down which part is bad, if the body housing is damaged enough to affect how parts seat, or if LG parts do not fit and you need help identifying the model.

• Vacuum repair service
• LG appliance repair
• Vacuum repair cost guide

Not sure which part it is? Book a same-day LG vacuum diagnostic.