industries > Automotive

Automotive Contract Manufacturing for OEMs and Tier Suppliers

From safety-critical assemblies to interior accessories, we build precision processes that automotive has relied on for decades.

IATF 16949:2016 Certified | ISO 9001:2015 Certified

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Driving Results for Tier One Automotive Manufacturers

We understand the automotive market and have built our systems and processes to align with your priorities. Here’s how we do it.

Uncompromising Precision

Every automotive program at LMC starts with Advanced Product Quality Planning and doesn’t ship without passing first article inspection. We run failure analysis before parts ever reach production, monitor process consistency in real time, and use vision inspection systems to catch what human eyes miss. We also support PPAP submissions at every level. 

Just-in-Time Inventory Handling

We maintain dedicated warehouse space to store your finished components until you’re ready for them. Combined with proactive raw material sourcing and dual supplier relationships, we’re built to keep your program running smoothly.

End-to-End Process Coordination

Once your metal components are stamped, we coordinate heat treating with a certified local partner to bring them to your exact metallurgical specifications. Parts come back to our facility for final assembly, inspection, and packaging — then ship directly to their next destination in your supply chain.

Fastest Path to Profitability

Our Design for Manufacturability process puts our engineers in your corner at the design stage, reviewing part geometry, material selection, and tooling design to eliminate problems before they cost you. This gives you the fastest path to economies of scale with fewer production interruptions.

Uncompromising Precision

Just-in-Time Inventory Handling

End-to-End Process Coordination

Fastest Path to Profitability

Uncompromising Precision

Every automotive program at LMC starts with Advanced Product Quality Planning and doesn’t ship without passing first article inspection. We run failure analysis before parts ever reach production, monitor process consistency in real time, and use vision inspection systems to catch what human eyes miss. We also support PPAP submissions at every level. 

Just-in-Time Inventory Handling

We maintain dedicated warehouse space to store your finished components until you’re ready for them. Combined with proactive raw material sourcing and dual supplier relationships, we’re built to keep your program running smoothly.

End-to-End Process Coordination

Once your metal components are stamped, we coordinate heat treating with a certified local partner to bring them to your exact metallurgical specifications. Parts come back to our facility for final assembly, inspection, and packaging — then ship directly to their next destination in your supply chain.

Fastest Path to Profitability

Our Design for Manufacturability process puts our engineers in your corner at the design stage, reviewing part geometry, material selection, and tooling design to eliminate problems before they cost you. This gives you the fastest path to economies of scale with fewer production interruptions.

Manufacturing Services for Automotive

We serve leading tier-one automotive manufacturers with metals, plastics, and engineering expertise under one roof.

Precision Metal Stamping
Progressive Die Stamping
In-Die Tapping
In-Die Assembly
Plastic Injection Molding
Plastic Insert Molding and Overmolding
Prototyping
Design for Manufacturing Page

Parts We Produce

Seat Belt Assemblies

We precision-stamp the metal tongue components used in seat belt restraint systems, then coordinate heat treating with our certified local partner to bring parts to the exact specifications required for safety applications. The metal tongues return to our facility for insert molding, creating a strong, integrated bond between the metal tongue and its plastic counterpart that meets the demanding performance requirements of this application.

Sun Visor Assemblies

We manufacture the formed metal arms for sun visor assemblies in-house, using custom-built equipment our engineering team developed to control quality from the start. Metal arms are formed and tapped to create internal wiring channels for vanity light electronics, a process that requires burr-free internal surfaces to protect the wiring from fraying. Parts are sent to our local heat treating partner for thermal processing, then returned to our facility for final plastic overmolding to create the complete assembly.

Powertrain and Structural Stampings

Powertrain and structural metal stampings require consistent dimensional accuracy, verified material properties, and process controls that hold up across high-volume production runs. LMC produces these components using progressive die stamping, with in-die tapping and in-die assembly performed as part of the same operation where applicable, reducing secondary operations and improving repeatability.

Interior Trim and Plastic Components

Interior-facing automotive components demand more than dimensional accuracy. They need to look right, feel right, and hold their appearance across the life of the vehicle. We produce injection molded interior trim and plastic components with tight tolerance control and finish verification built into every run.

EV Components

As the automotive market shifts toward electric vehicles, the parts and processes required are evolving. We manufacture precision-stamped and overmolded components for EV applications, including structural brackets, housing components, and insert-molded assemblies used in battery systems, charging infrastructure, and electrical enclosures. Our experience with overmolding and insert molding makes us a strong partner for EV components that combine metal and plastic into a single finished assembly, reducing secondary operations and simplifying your supply chain.

Materials We Work With

Metals

  • Cold-rolled steel
  • High-strength steel (HSLA)
  • Stainless steel
  • Aluminum alloys
  • Specialty alloys for heat-treated applications

Engineered Resins and Plastics

  • ABS (Acrylonitrile Butadiene Styrene)
  • Nylon (PA6, PA66) — including glass-filled grades for under-hood applications
  • Polypropylene (PP)
  • TPE / TPU for overmolded soft-touch applications
  • Specialty resins for high-temp and chemical-resistant environments

Working with a material or finish specification outside this list? Our engineering team has experience with a wide range of materials. Contact us to discuss your project!

Taking Charge of Results

We had been sourcing the metal arms for a sun visor assembly from another supplier, but were running into issues with the sourced parts arriving out of tolerance. Our engineering team decided we could do better in house. We designed and built a metal forming machine to bend the steel rods to shape, implementing a vision system and chemical sensors to catch any imperfections in the finished arms before they proceeded to assembly. This helped us shorten the supply chain for our customer, which in turn produced better quality parts and shorter lead times.

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Frequently Asked Questions

Yes. We manage PPAP submissions from Level 1 through Level 5. Our team handles the documentation requirements and guides you through the approval process whether you’re launching a new program or transitioning from another supplier.

We coordinate heat treating through a tight partnership with an industry-leading thermal processing company located just a few miles from our facility. Parts are sent out for heat treating to your hardness and tensile specifications, then returned to us for final assembly, overmolding, or inspection. Hardness testing certification is available electronically.

We produce precision stampings, insert-molded assemblies, and overmolded components for EV applications including battery system brackets, electrical housings, and charging-related hardware. Our IATF 16949-compliant quality processes meet the supplier requirements of EV OEMs and tier suppliers.

Traceability in automotive manufacturing is maintained through a combination of process documentation, in-process inspection records, and quality system controls. APQP documentation establishes the process plan from program launch, SPC monitoring tracks process consistency in real time, and vision inspection systems provide part-level defect detection. For PPAP programs, all documentation is organized and submitted to customer specifications, creating a complete audit trail from material receipt through finished part shipment.

A wide range of automotive components can be contract manufactured, including safety-critical assemblies like seat belt tongues, structural metal stampings, overmolded interior components, sun visor assemblies, powertrain hardware, and EV-specific parts like battery brackets and electrical housings. Contract manufacturers with both metal stamping and injection molding capabilities can handle the full spectrum, from raw material to finished assembly, under one roof.

IATF 16949 is the international quality management standard for the automotive industry. It defines the requirements for quality systems, process controls, and documentation that automotive OEMs and tier suppliers must meet to participate in the automotive supply chain. For contract manufacturers, IATF 16949 certification signals that their production processes, inspection systems, and documentation practices meet the rigorous standards the industry demands. LMC is certified to both IATF 16949:2016 and ISO 9001:2015.

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