If a child is hurt, call 911 or Poison Control (1-800-222-1222).

HARMONY BIG BOOST DELUXE

NHTSA lists 1 recall for this car seat model as of Oct 15, 2026.

Last checked against NHTSA data on Oct 15, 2026, 10:54 AM ET.

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NHTSA campaignDateUnitsNotice
18C001000 Apr 17, 2018 148165 Official notice

Status: Recall found NHTSA

Read the official notice and compare the model number and manufacture date on your label.

Harmony Juvenile Products child seat recall 18C001000

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Hazard (from the official notice)

Excessive chest force can increase the risk of injury.

Remedy (from the official notice)

Harmony will notify owners, and provide a replacement booster seat of a different model, free of charge to eligible U.S.

Hazard (from the official notice)

Excessive chest force can increase the risk of injury.

Remedy (from the official notice)

Harmony will notify owners, and provide a replacement booster seat of a different model, free of charge to eligible U.S. consumers who currently own a Big Boost unit and are the original purchaser, original owner, and/or original user of the Big Boost unit. Interim notices informing owners of the safety risk were mailed August 21, 2018. The recall began July 3, 2020. Owners may contact Harmony customer service at 1-877-306-1001.

Summary (from the official notice)

Harmony Juvenile Products (Harmony) is recalling certain Harmony Big Boost Deluxe booster seats. In the event of a crash, the seat belt may cause excessive force to be applied to the restrained child's chest. As such, these booster seats fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 213, "Child Restraint Systems."

Hazard and remedy text is shown word for word from the official notice.

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