EN 
FR About Us
Mespiecesauto is a company specializing for nearly 20 years in the reverse engineering of automotive parts for classic cars, youngtimers, and sports vehicles.
Our mission: to bring original parts back to life by reanalyzing manufacturing processes, materials, and mechanical and functional tolerances, in order to establish a true production specification.
The goal? To match the original (OEM) quality as closely as possible.
Well-executed reverse engineering means not only the satisfaction of fitting and using the part, but also a faithful tribute to the engineers of the era.
We now have an extensive archive of technical resources, including scientific publications, blueprints, measurements, schematics, and internal manufacturer documentation.
This allows us to faithfully reproduce rare or discontinued parts.
Who is behind Mespiecesauto?
My name is Benjamin Vietti. As the founder of Mespiecesauto, I design and oversee every remanufacturing project offered on this site: from the analysis of the original part through to the validation of production runs.
My background is that of an enthusiast who became an engineer. Drawn to automotive engineering from the very beginning, I focused my work on researching and understanding the mechanical solutions developed by the engineers of the era: analysing design choices, materials and manufacturing processes is at the heart of my approach, and it naturally led me to reverse engineering.
After fifteen years of hands-on practice — metrology, material testing, research in manufacturer archives, development work with foundries, forges and machinists — I chose to consolidate this experience through formal education: I hold a technical degree (BTS) specializing in internal combustion engines and a master's degree in mechanical engineering from UTBM (University of Technology of Belfort-Montbéliard). Practice first, theory as confirmation — the same method I apply to the parts themselves.
Today, as a member of the SIA – the French Society of Automotive Engineers, I am part of a recognized professional network in which I continue to learn, exchange and actively contribute to the technical evolution of the profession.
The method
Every remanufacturing project follows the same systematic approach: metrology surveys of the original part, identification of materials and treatments, analysis of the manufacturing processes of the era, followed by the drafting of a complete production specification. Manufacturing is then entrusted to specialized workshops — foundry, forging, stamping, CNC machining, injection moulding — and every production run is inspected before going on sale. No approximation: every part is based on the original specifications, verified in the archives, not on a simple dimensional copy.
Our areas of expertise
The catalogue mainly covers the sporty Renaults of the 1970s to 1990s — R5 Alpine, R5 Turbo, R21 Turbo, Clio 16S and Williams — as well as the Alpine A110, A310 and GTA, covering engine, braking, running gear and cooling. Other makes (Peugeot, Porsche, Ford, Lancia) are addressed as new developments arise.
Why this approach ?
My goal is to combine technical rigour with a passion for detail: ensuring a reproduction or a design faithful to the original spirit while integrating today's performance and safety requirements. Fidelity, precision, craftsmanship – that is my vision of automotive engineering.
I regularly share the details of this work on the technical blog and in video. For any question or specific request: contact.
UTBM graduate – Member of the SIA