Our customers require that we provide them with high quality products at the right time. Our entire supply chain is critical to meeting these challenges. We regard openness, partnership and long-term relationships with our suppliers as a prerequisite for mutual success.

Find out here on how we want to build successful partnerships. We are always looking for the most reliable supplier, the highest quality and the best price - both in national and international markets. We look forward to welcoming you as a reliable supplier in the future.

Supplier Guideline

Long-term partnerships is one of our principles. Find out more about our requirements for development and manufacturing competence including the quality management of our suppliers in our Supplier Guideline.

Download Supplier Guidelines

Supplier selection

Our selection of suppliers for new projects is based on our holistic supplier evaluation. Criteria include product and logistics quality, price-performance ratio, the production concept, as well as the quality and environmental management system.

Supplier Self Assessment

Please fill out the supplier self-assessment to initiate a first contact. We would like to get to know you!

Download Self-Assessment Form


  • Customer satisfaction, whether internal or external, is our focus. We demand a high level of customer orientation from our suppliers too.
  • We expect an established quality system that meets the demands of the automotive industry.
  • Our goal is also our responsibility: zero defects.
  • The ever-increasing demands of our customers can only be met by ever-improving suppliers.
  • The purchasing decisions are based solely on factual and comprehensible criteria.
  • We have long-lasting relationships with our suppliers. Prerequisite is the on-schedule and flexible fulfillment of our needs, a pronounced cost awareness, innovation and the assistance in the development of technical solutions.
For more information read our Supplier Code of Conduct.


  • Plastic parts material: PA6 / PA
  • Ceramic parts Material: drawn and pressed - porcelain / steatite
  • Stamping parts
  • Pulling and turning parts
  • Resistance alloys, for example: NiCr 6015 / CuNi44
  • Harnesses