The Poissy factory (Yvelines) will no longer assemble cars from the end of 2028. The historic Stellantis site (formerly Peugeot) is being reoriented towards new industrial activities. The decision threatens to eliminate 500 worker positions.
Automotive production of the Stellantis group’s DS3 and Opel Mokka will stop at the car manufacturer’s historic site in Poissy (Yvelines), west of Paris. The factory will ensure the production of parts and sub-assemblies for other factories, the development of activities linked to the circular economy (reconditioning of used vehicles and manufacturing of spare parts), the transformation of new vehicles and will welcome an innovation center around 3D printing.
According to AFP, “the majority of unions at the factory said they were relieved Thursday at the industrial sustainability of the site, despite the end of automobile production.” But many employees are not convinced of this reconversion and see their core business stop.
Why this decision?
The Stellantis group posted a loss of 20.1 billion euros in the second half of 2025, notably due to a sharp drop in sales in Europe. Faced with this, the group must manage industrial overcapacity. The factories are too numerous compared to the production rate, the group has therefore decided to specialize its sites. With Stellantis’ losses in recent years, which in 2025 was the second heaviest for a French group after Vivendi’s record in 2022, the automobile group can no longer afford to lose so much money.
A solution?
Stellantis has announced plans to reduce its workforce from 1,500 to 1,000 workers. The group clarified BFMTV that these departures will be made “taking into account the age pyramid in a progressive manner through a policy of secure employment via natural departures or individual measures based on volunteering allowing a solution to be found for everyone”.
Some unions like Sud Stellantis Poissy are calling for a strike on Monday April 23 “to impose guarantees on management so that all workers continue to be able to support their families after the last car produced”.
Turning the page on assembly in Poissy, the last major automobile factory in Île-de-France is closing, symbol of a very complicated period for French and European automobile production.
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