Fonderie de Bretagne, a subsidiary of Groupe Renault, is a major player in South Brittany’s economy. Established there since 1965, FDB produces rough-cast and machined parts for the automotive industry: safety components and engine and gearbox parts.


  • FOUNDED IN: 1965
  • LEGAL FORM AND CAPITAL OWNERSHIP: "S.N.C." (general partnership) with capital of 2 962 000 € fully owned by Renault SAS (France)
  • ACTIVITY: Production of foundry parts, raw and machined, in Spheroidal Graphite cast iron.
  • WORKFORCE: 385 employees at 31th of December 2019
  • AREA: 42 250 m2 covered, on a ground of 27 ha
  • CERTIFICATIONS: ISO 9001 – ISO 14001
  • ADDRESS: Fonderie de Bretagne Z.I de Kerpont – Rue Daniel Trudaine – 56850 Caudan – FRANCE
  • TELEPHONE: + 33 2 97 87 47 47

Main products

  • Engine parts: manifolds and exhaust bends
  • Transmission parts: differential housings
  • Chassis parts (safety parts): suspension arms and rocket carriers
Production 2019
  • Iron casting (tonnes) : 10 612


  • 1965: the foundation stone of the plant was laid by French Prime Minister Georges Pompidou.
  • 1966: thee first casting line started work on 1 July. Eventually, a total of four casting lines would come into operation, supplied by 11 electric fusion kilns.
  • 1972: first modernisation operation, with the replacement of one of the first four casting lines.
  • 1979: start of two new casting lines (exhaust manifolds).
  • 1996: six Comau machine-tooling centres brought into operation (machine tools for machining mechanical parts).
  • 1999: the foundry was attached to the Teksid (Fiat)group.
  • 2000: the machine-tooling building was extended and 11 Heller centres were installed (turning-milling).
  • 2009: la Fonderie de Bretagne becomes a 100% subsidiary of Groupe Renault again.
  • 2011: Groupe Renault announced a plan to modernise the foundry, including installation of a new casting line.
  • 2012: start-up of production of fifth-generation K9K engines.
  • 2014: start-up of production of kingpins for Trafic, Twingo and Smart.
  • 2015: arrival of a new automated finishing stand.
  • 2016: startup of the new Künkel-Wagner casting line for stub axle carriers, suspension arms, units and new parts, including crankshafts for the H4 engine.
  • 2017: launch of the pre-machining project with the implanation of 4 towers (assignment of 4 housings references).
  • 2018: startup of a new pre-machining line for differential units.
  • 2018 : Launch of a new differential gearbox pre-machining line. Start of 3D printing for tools.
  • 2019 : Launch of a non-contact dimensional checking fixture (parts and tooling) ScanBox Gom