Stellantis to end car assembly at Poissy by late 2028, pivots historic site to aftermarket and parts
Source · Automotive desk
— Summary
Stellantis confirmed on Thursday 16 April 2026 the end of car assembly at its Poissy plant (Yvelines department, west of Paris) by the end of 2028. The announcement, made during the plant's works council meeting, closes a suspense of several months: the Paris region will soon lose its last remaining car-assembly plant. The site, opened in 1937 by Ford, later Simca's main factory before PSA took it over in the late 1970s (when it employed nearly 27,000 workers), today assembles the Opel Mokka and DS 3. Output — just under 90,000 vehicles in 2025 — is expected to drop to around 60,000 this year.
The plant will not close. Stellantis is committing around €100mn to convert it into a hub dedicated to "the different lives of vehicles": producing spare parts for its other French sites (notably Hordain in the North, where the group builds its light commercial vehicles) and for the aftermarket. The plan includes €20mn to modernise the stamping shop with a new-generation press, a new engine line transferred from Vesoul (Haute-Saône) starting this autumn, a new paint shop, a vehicle-deconstruction line (salvaging viable parts for the aftermarket), and a 3D-printing capability. The existing Green Campus (R&D, support functions, Stellantis France HQ) remains in place.
On employment, management is counting on natural attrition. The industrial headcount will fall from 1,800 workers today (1,500 of them genuinely operational) to 1,200 by 2030, without a social plan. Part of the €100mn budget will fund retraining. The majority union CFE-CGC welcomed "an important first step". The decision — echoing Renault's conversion of Flins — only partly addresses Stellantis's European overcapacity problem: most of its plants are running well below capacity, and Bloomberg has reported discussions with Chinese carmakers to use some lines. The May strategic plan will be closely watched. Source: Les Echos, 16 April 2026, Yann Duvert.
The story in one line: Stellantis confirms the end of car assembly at Poissy by end-2028 and commits around €100mn to convert the historic French auto site into a hub for spare parts, aftermarket and circular economy — no social plan, but an ~600-worker reduction in factory headcount by 2030.
Key numbers
Assembly ends late 2028; plant opened in 1937 by Ford.
~90,000 vehicles produced in 2025 (Opel Mokka and DS 3); ~60,000 expected in 2026.
Up to ~27,000 staff in the 1970s under PSA ownership.
~€100mn investment for the conversion.
€20mn to modernise the stamping shop with a new-generation press.
1,800 workers today (1,500 operational) → 1,200 by 2030, no social plan.
New engine line transferred from Vesoul this autumn.
Two existing Stellantis circular-economy hubs: Mirafiori (Italy) and São Paulo (Brazil).
Why it matters
Poissy was one of the last symbols of the French automotive industry in the Paris region. The end of assembly is not a closure: the site is pivoting to downstream and aftermarket — spare parts for bodyshops, replacement engines, 3D printing, and vehicle deconstruction to salvage viable parts. That preserves an industrial footprint in Île-de-France, avoids a social plan, and keeps the land and skill base productive.
But the industrial symbolism is sharp: the Paris region loses its last car-assembly plant, reflecting two broader trends — the concentration of European assembly into a few large hubs and Stellantis’s chronic overcapacity, with most of its lines running below potential. The Bloomberg-reported discussions with Chinese carmakers to house production lines is the real tell on how severe that overcapacity is.
Takeaway
Poissy is the most symbolic decision of a broader plan we will see in May: Stellantis has to reconcile its European capacity with actual demand. Two things to watch: (1) the pace at which other European assembly sites are converted or closed in the May plan, and (2) the outcome of the Chinese carmaker discussions — if confirmed, they signal a structural shift in Europe’s industrial landscape.