Electric-vehicle startup Rivian Automotive Inc. is suing a key supplier of seats, warning that a pricing dispute could impact production of an electric van ordered by Amazon.com Inc.

Rivian RIVN, -6.89% in March sued the supplier, Ohio-based Commercial Vehicle Group Inc., accusing it of violating the supply contracts for seats by nearly doubling an initially agreed-upon price per unit, according to records filed with a Michigan court.