OEM vs. Tier 1 vs. Tier 2: Understanding the Automotive Supply Chain

Unfinished car body on a conveyor belt in a large automotive factory.

The automotive industry is a highly structured ecosystem. It comprises different levels of suppliers. These suppliers play a crucial role in vehicle manufacturing. Understanding the relationships between Original Equipment Manufacturers (OEMs) and Tier 1 (T1) and Tier 2 (T2) suppliers is essential.

This understanding is vital for businesses looking to enter or expand within the automotive supply chain. Each of these players has a distinct role. This role is in the development, production, and assembly of vehicles. Let’s break down the key differences. We’ll also examine the responsibilities and interactions between OEMs, T1, and T2 suppliers.

What is an Automotive OEM?

An Original Equipment Manufacturer (OEM) is a company. This company designs, manufactures, and sells vehicles. They sell under their own brand name. OEMs are responsible for assembling the final vehicle. They ensure all components work together. This ensures they meet safety, performance, and regulatory standards. Some of the most well-known automotive OEMs include:

  • Ford

  • General Motors

  • Toyota

  • BMW

  • Tesla

  • Volkswagen

OEMs do not produce all vehicle components themselves. Instead, they rely on an extensive supply chain. This chain consists of Tier 1 and Tier 2 suppliers. These suppliers provide parts and systems. These parts and systems are used in the final assembly. Their primary focus is on vehicle design. They also concentrate on integration, marketing, and sales. Manufacturing operations are often distributed across global supply networks.

The Role of Tier 1 Suppliers in the Automotive Industry

A Tier 1 (T1) supplier is a company. This company supplies directly to an OEM. These suppliers produce major systems. They also create modules or complete assemblies. These go into the final vehicle. Tier 1 suppliers collaborate closely with OEMs. They develop and manufacture components. These components must meet specific vehicle requirements. These requirements include performance, safety, and design. Some well-known Tier 1 suppliers include:

  • Bosch (electronics, braking systems, sensors)

  • Continental (ADAS, tires, powertrain components)

  • Magna International (body structures, seating, drivetrains)

  • ZF Friedrichshafen (transmissions, steering systems)

  • Denso (climate control, engine components, electronics)

Tier 1 suppliers often design and engineer components. They do this in partnership with OEMs. Many Tier 1 companies also manufacture their own technologies. This makes them leaders in innovation. They are responsible for:

  • Developing complete systems. Examples include infotainment modules. Braking systems and powertrains are also included.

  • Ensuring that parts meet OEM standards. This includes quality, safety, and reliability.

  • Managing logistics and just-in-time (JIT) delivery. This delivery is to OEM assembly plants.

  • Innovating with new solutions. These solutions include materials, electronics, and software.

Understanding Tier 2 Suppliers in the Automotive Supply Chain

A Tier 2 (T2) supplier provides raw materials. They also provide components or sub-assemblies to Tier 1 suppliers. They do not supply directly to OEMs. Tier 2 suppliers play a crucial role. They are essential in the automotive supply chain. They produce materials or smaller parts. Tier 1 companies use these to manufacture larger automotive systems. Examples of Tier 2 suppliers include:

  • Companies that manufacture sensors. These sensors are used in advanced driver assistance systems (ADAS).

  • Metal suppliers that produce aluminum or steel components. These components are for chassis or engine blocks.

  • Semiconductor companies that manufacture microchips. These microchips are for automotive electronics.

  • Plastic molders that provide parts. Examples include dashboards and interior trims. Casings are also included.

Tier 2 suppliers do not work directly with OEMs. However, they must still meet strict industry standards. This ensures their components meet performance and safety regulations. Their main responsibilities include:

  • Supplying raw materials. Examples include steel, aluminum, rubber, and glass.

  • Manufacturing precision components. Examples include fasteners and wiring harnesses. Circuit boards are also included.

  • Delivering sub-assemblies. Examples include LED lighting components. Fuel injectors and seating foam are also included.

  • Supporting research and development (R&D). This R&D aims to improve material durability and performance.

OEM vs. T1 vs. T2: Key Differences in the Automotive Industry

Category

OEM (Original Equipment Manufacturer)

Tier 1 Supplier (T1)

Tier 2 Supplier (T2)

Role

Designs, assembles, and sells vehicles

Supplies major components/systems directly to OEMs

Produces parts, materials, or sub-assemblies for T1s

Examples

Ford, Toyota, Tesla, Volkswagen

Bosch, Magna, ZF, Denso

Steel manufacturers, semiconductor producers, molders

Main Responsibility

Vehicle design, assembly, marketing

Manufacturing complex automotive systems/modules

Producing raw materials, small components, sub-assemblies

Interaction

Works directly with Tier 1 suppliers

Works with both OEMs and Tier 2 suppliers

Works primarily with Tier 1 suppliers

Innovation Focus

Vehicle engineering, software, branding

Advanced automotive technology, system integration

Material science, component-level improvements

Quality Standards

Extremely high, regulated by agencies

High, ensuring OEM compatibility

High, ensuring durability and performance

Why This Hierarchy Matters in the Automotive Supply Chain

The automotive supply chain is highly structured and ensures efficiency, scalability, and cost-effectiveness. Each tier plays a crucial role that keeps the industry running smoothly. It also balances innovation, quality, and production costs. For businesses entering the automotive sector, understanding this hierarchy is essential. It’s crucial for navigating supplier relationships. It also helps in securing contracts. Some key takeaways include:

  • OEMs drive market demand. They do this by setting vehicle design goals. Features and production goals are also set.

  • Tier 1 suppliers are responsible for complex system production. They work closely with OEMs.

  • Tier 2 suppliers provide foundational materials and components. They do not interact directly with OEMs.

  • Global supply chain disruptions can impact different tiers. They impact them in unique ways. Strong contingency planning is required.

Emerging Trends in the Automotive Supply Chain

The automotive supply chain is evolving. This evolution is due to electric vehicles (EVs). Autonomous driving and smart mobility also play a role. New suppliers are entering the space. They specialize in battery technology. Semiconductor chips and AI-driven software are also included. This blurs the lines between traditional tiers. Some trends to watch include:

  • Semiconductor shortages are impacting all tiers. OEMs and Tier 1 suppliers struggle to secure chips. These chips are for vehicle electronics.

  • There’s growth in vertical integration. Companies seek to control more of their supply chain. This reduces costs and dependencies.

  • New entrants from the tech industry are influencing developments. Examples include Google and Apple. They influence vehicle software and autonomous driving.

Conclusion: Understanding the Automotive Supply Chain

The automotive supply chain is a carefully structured network. OEMs, Tier 1, and Tier 2 suppliers each have specific roles. These roles contribute to successful vehicle production. While OEMs assemble and brand the final vehicles, Tier 1 suppliers create complex systems. Tier 2 suppliers provide raw materials. They also provide essential components. For businesses and investors seeking to enter the automotive industry, understanding this structure is crucial.

It helps identify their place in the industry and also clarifies who their key partners will be. Finally, it shows how they can provide value. The industry is shifting. It’s moving towards electrification. Automation and digital transformation are also happening. The relationships between these tiers will continue to evolve. This will create new opportunities and challenges.

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