"As part of ongoing investigations on pollutants in the automobile sector, today PSA Group has been the subject of a visit and a seizure by France's General Directorate for Competition Policy, Consumer Affairs and Fraud Control (DGCCRF)," PSA, France's biggest carmaker, said in a statement.
PSA said it was cooperating with the authorities and "confirms compliance of its vehicles in pollutant emissions in all countries where it operates".
Contacted by AFP, the fraud squad gave no details on the raid or on what prompted it.
The German company has admitted it installed illegal software into 11 million 2.0 litre and 3.0 litre diesel engines worldwide, including VW, Porsche and Audi models, that intentionally masked the vehicle's real emissions levels during testing.
In the latest scandal to rock the sector, Japan's Mitsubishi Motors admitted that it also cheated, on fuel-efficiency tests.
The shock statement sent stock market investors fleeing, wiping USD 2.5 billion off Mitsubishi's market value in just two days.