The automotive manufacturing sector is feeling the strain as the trade dispute between the United States and Canada intensifies. The once-seamless integration of auto production across the border is now facing significant hurdles due to new tariffs and retaliatory measures.
For decades, the U.S. and Canadian auto industries have operated as a single ecosystem. However, the recent failure to reach a new trade deal has led to a rapid escalation in tensions. In August, the U.S. imposed new tariffs on aluminum and steel, with President Trump threatening 50% tariffs on Canadian vehicles, auto parts, and steel effective January 1, 2027. Canada responded with retaliatory tariffs on a variety of U.S. goods, including steel and aluminum.
The interconnected auto supply chain
The auto supply chain is a complex web of interconnected parts and processes. A single component, such as a steering wheel, can consist of 50 to 100 different parts sourced from various locations. This intricate network has been built on the foundation of free trade agreements that have allowed for the seamless movement of goods across borders.
The U.S. and Canada began integrating their auto supply chains in 1965 with a pact aimed at consolidating their industries. This was further deepened by the North American Free Trade Agreement (NAFTA) in 1994, which included Mexico and removed many duties between the three countries. The 2020 United States-Mexico-Canada Agreement (USMCA) revised these terms, requiring that auto content be 75% North American to avoid tariffs.
This interconnected system has allowed for components to be assembled in plants across the three countries and ultimately combined in another. For example, a casting might start in Mexico, be processed in the U.S., further processed in Canada, and then shipped back to the U.S. for final assembly. This interconnected model works efficiently when the border is predictable, but recent tariffs and retaliatory measures are creating new points where costs and paperwork can accumulate.
The impact on auto-parts suppliers
The pressure from the trade war is being felt across the auto-parts supply chain. Large suppliers with USMCA-compliant products have so far avoided many direct automotive tariffs, but they are not insulated from higher material costs and production changes. For smaller companies deeper in the supply chain, these pressures can be much harder to absorb.
Auto suppliers are not only worried about tariffs on finished components but also on the raw materials they use, such as steel, aluminum, and copper. Current U.S. Section 232 rules apply tariffs ranging up to 50% on certain steel, aluminum, and copper products from Canada. This means suppliers must examine not only where a part was manufactured but also what went into it.
For instance, the U.S. Midwest aluminum premium has been elevated due to high tariffs and tight North American supply. This increase in metal costs can significantly impact suppliers making thousands of lightweight structural parts, castings, or housings. Customers may eventually absorb some of these increases, but reimbursement negotiations can lag behind the original expense.
Smaller suppliers face unique challenges
Canada’s automotive manufacturing network extends far beyond large multinational corporations. There are nearly 700 parts suppliers operating in the Canadian ecosystem, including numerous smaller machining, tooling, moulding, and component companies. These smaller suppliers often have fewer customers and less working capital, making it harder for them to absorb the shock of new tariffs and retaliatory measures.
Industry surveys show that 82% of Canadian manufacturers and suppliers are changing their supply-chain strategies in response to the tariff environment. Additionally, 63% have increased prices, and 75% of auto-sector leaders are concerned about geopolitical trade disputes and continuing uncertainty.
The trade war is creating significant challenges for auto-parts makers, disrupting supply chains and increasing costs across the industry. As the situation evolves, companies will need to carefully navigate these uncertainties to maintain their operations and protect their workers.
