Tier 1 suppliers and the squeeze from both sides

# Tier 1 suppliers and the squeeze from both sides

A wiring harness for a modern electric vehicle contains several kilometers of copper cable. When copper prices spike, the company that absorbs most of that pain isn't the automaker whose logo is on the hood. It's a supplier you've likely never heard of, sitting one or two steps back in the supply chain, contractually locked into a price it agreed to eighteen months earlier.

This is the daily reality of a Tier 1 automotive supplier: squeezed by raw material costs from below and price demands from above, with limited room to pass either through.

The pyramid: who sits where

The auto industry organizes suppliers into tiers based on their distance from the final assembler.

OEMs (original equipment manufacturers), like Volkswagen, Toyota, Ford, General Motors, and Stellantis, design and assemble the final vehicle and own the brand relationship with the customer.

Tier 1 suppliers sell directly to OEMs. They deliver complete, engineered systems, not raw parts. Think Bosch (braking systems, sensors, fuel injection), Continental (tires, but also braking and software systems), Denso, Magna, and ZF Friedrichshafen. A Tier 1 doesn't just supply a part; it often co-designs it with the OEM years before production starts.

Tier 2 suppliers sell components to Tier 1s: electronic control units, castings, specialized plastics, semiconductors. Companies like Aptiv or smaller specialized electronics firms often sit here, though some, confusingly, operate as both Tier 1 and Tier 2 depending on the program.

Tier 3 suppliers sit further back: raw material processors, basic machined parts, commodity chemicals. This is where steel mills, aluminum smelters, and resin producers live.

Value and risk don't distribute evenly across this pyramid. Tier 1s carry the heaviest engineering burden and the most contractual exposure, which is exactly why they get squeezed from both directions.

The squeeze from below: raw materials

Tier 1s buy steel, aluminum, copper, rubber, and increasingly battery-grade lithium and nickel (for EV components) from Tier 2 and Tier 3 suppliers. These commodity prices are volatile and set on global markets the supplier doesn't control.

Copper is a good example. It's essential for wiring harnesses, electric motors, and battery systems. Copper prices are driven by global demand (including from construction and renewable energy) and supply disruptions in major producing countries like Chile and Peru. When copper prices rise sharply, as they did during multiple periods over the past decade, a Tier 1 that quoted a fixed price to an OEM two years earlier eats the difference.

The 2021 to 2022 period offered a broader lesson: pandemic-driven shortages of semiconductors (a Tier 2/3 input) forced automakers to idle plants worldwide, and Tier 1s who had committed to delivery schedules absorbed both penalty costs and lost volume. The Peterson Institute has useful background on how the chip shortage rippled through auto supply chains.

The squeeze from above: OEM pricing power

OEMs are consolidated, sophisticated buyers. A handful of global automakers represent enormous purchasing volume, which gives them real leverage in negotiations.

Standard practice in the industry includes:

• Long-term fixed pricing, often locked in during the vehicle's design phase, years before production, with limited built-in mechanisms to adjust for input cost inflation.
• Annual price-down clauses, sometimes called "cost reduction targets," where suppliers contractually commit to reducing their price to the OEM year over year, on the assumption that the supplier will find efficiency gains.
• Multi-sourcing threats: OEMs frequently qualify two or more suppliers for the same part specifically to preserve negotiating leverage and avoid dependency on one company.

This is the defining tension of the Tier 1 position: rising costs on the input side, contractually falling prices on the output side.

How Tier 1s protect margin

Bosch, Continental, and their peers aren't passive victims in this dynamic. They've built specific defenses.

Indexed contracts. Where they have enough negotiating power (typically for parts with fewer qualified alternative suppliers, or highly engineered systems), Tier 1s push for raw material index clauses that automatically adjust price if a benchmark commodity price moves beyond a threshold.

Moving up the value stack. Both Bosch and Continental have invested heavily in software and electronics content (sensors, driver assistance systems, battery management software) rather than pure mechanical parts. Software and systems integration carry higher margins and are harder for OEMs to multi-source, because switching suppliers means re-engineering and re-validating an entire system, not swapping a commodity part.

Scale and diversification. Bosch supplies practically every major OEM globally and operates across multiple industries beyond automotive (power tools, industrial technology, home appliances). This diversification means no single OEM relationship, and no single commodity shock, can threaten the whole company. Continental similarly spans tires (a separate business with its own margin dynamics) and automotive technology.

Consolidation and exit. Where a product line has permanently thin margins, Tier 1s have divested. Continental spun off its powertrain business as Vitesco Technologies in 2021, partly to let each unit focus capital and pricing strategy on its specific market rather than cross-subsidizing.

Vertical integration in strategic areas. Some Tier 1s have moved backward into raw materials or components for critical future technologies, particularly around EV batteries and semiconductors, to reduce dependency on volatile external suppliers for parts that matter most to their future product roadmap.

Who has the power, and why it shifts

The balance of power isn't static. It shifts with three variables:

Sourcing complexity. The harder it is to switch suppliers, the more power the supplier holds. A commodity bracket has many qualified suppliers; a proprietary braking software system has very few. Bosch's power in braking systems comes partly from decades of proprietary engineering and safety certification history that a new entrant can't easily replicate.

Industry cycle. During the 2021 to 2023 chip shortage, some Tier 2 semiconductor suppliers briefly gained unusual leverage over Tier 1s and even OEMs, because demand vastly outstripped supply. Power flowed backward in the chain, temporarily, for the first time in decades.

Regulatory pressure. Emissions regulations (like the EU's CO2 fleet targets, enforced by the European Commission, or US fuel economy standards administered by the National Highway Traffic Safety Administration, NHTSA) push OEMs toward new technologies. Tier 1s who develop the required technology early, such as advanced emissions control or EV components, gain temporary pricing power because OEMs have no alternative supplier for a regulation-driven need.

This is why Bosch's and Continental's strategic bets on electrification and software aren't just about growth. They're about repositioning themselves in the power structure before the next cost or regulatory shock arrives.

🎬 [VIDEO: "How Car Parts Are Made: Inside the Auto Supply Chain" - youtube.com - search this title; multiple manufacturing-focused channels cover the Tier 1-2-3 structure with real factory footage]

A simple worked example

Say a Tier 1 supplier signs a three-year contract to supply an electric motor component at a fixed price of $80 per unit, with copper representing an estimated 15% of input cost, or $12.

If copper prices rise 30% over the contract period (a plausible swing given historical volatility, though the exact number will vary by year and should be checked against current commodity data), the copper cost rises to about $15.60, a $3.60 increase per unit with no corresponding price adjustment from the OEM.