John Gomez, a lawyer who represents the victims’ family, and Larry N. Willis, who represents the dealership that lent the Lexus to the family, confirmed the settlement amount.

Toyota, which did not admit or deny liability in the settlement, fought to keep the settlement amount confidential, but The Los Angeles Times and The Associated Press argued that the public’s interest in the case outweighed confidentiality concerns.

A Superior Court judge on Monday agreed, but imposed a gag order in case the family wanted to appeal. They did not appeal, allowing lawyers to release the amount.

Toyota said in a statement it was disappointed the amount had been made public.

“As is common in these cases, these parties agreed to keep the amount confidential, in part to protect the families from unwanted solicitations and to allow them to move on from this difficult period,” the automaker said.

A crash in August 2009 killed Mark Saylor, 45, an off-duty California highway patrol officer; his wife; their daughter; and Mr. Saylor’s brother-in-law Chris Lastrella. They were killed on a suburban San Diego freeway when their car reached speeds of more than 120 m.p.h., struck a sport utility vehicle, flew off an embankment, rolled several times and burst into flames.

Investigators determined that a wrong-size floor mat had trapped the accelerator.

Toyota recalled millions of cars to replace floor mats that it said could cause the accelerator to jam. The carmaker later recalled millions more vehicles to replace gas pedals that it said could stick.

The case was considered the strongest of hundreds of lawsuits that have since been filed and consolidated before a federal judge in Orange County over claims stemming from sudden acceleration in several Toyota models and brake malfunctions with the company’s Prius hybrid.