South America Automotive Parts Zinc Die Casting Market Size & Share Analysis - Growth Trends and Forecast (2026 - 2031)

South America Automotive Parts Zinc Die Casting Market Trends and Insights

Growth in South American Passenger-Vehicle Production

Brazil achieved a notable rebound that lifted regional vehcile output in 2025, increasing immediate demand for zinc die-cast brackets and housings. According to the International Energy Agency, South America witnessed significant growth in electrified vehicles by 2025. Electric models require more zinc compared to their internal-combustion counterparts. In Argentina, a local-content mandate is driving increased sourcing toward domestic Tier-2 zinc casters. Additionally, the ratification of the EU-Mercosur pact is expanding export opportunities for foundries in Brazil and Argentina.

Rising Demand for EMC-Shielded E/E Housings in EVs

Electric drivetrains create electromagnetic interference, and zinc die-cast enclosures readily deliver 60-80 dB attenuation across 30 MHz-1 GHz, eliminating the cost of conductive coatings. By 2026, South America's electric vehicle (EV) fleet will require a significant number of housing units. The region is capable of meeting this demand using its existing pressure die-casting cells. ZA-27 alloy is gaining favor for motor shields, while Zamak 5 dominates under-floor battery trays exposed to salt spray. Brazil’s emissions standards indirectly accelerate EMI compliance, and a tight link to the United States EV supply chains keeps design cycles short.

Lightweighting Regulations Favoring Zinc Alloy Components

Brazil’s PROCONVE L-7/L-8 CO₂ limits, effective 2025, have been pushing OEMs to replace heavier steel brackets with zinc equivalents, trimming mass by 15-20% per part. Chile's introduction of voluntary lightweighting targets is encouraging zinc use in door handles and HVAC housings. Zinc’s self-passivating corrosion layer allows thinner wall sections than steel, a key benefit for coastal markets with chronic salt-spray exposure. The combined regulatory push cements zinc’s position for non-structural components over the long term.

Surge in EV Motor and Battery-Housing Applications

The International Zinc Association forecasts a fourfold jump in zinc per EV between 2022 and 2030 due to motor-end shields, battery-tray stiffeners, and inverter housings ^{[2]“Zinc in EV Components,” International Zinc Association, zinc.org}. South American OEMs are specifying ZA-27 early to sidestep future redesigns tied to 800-V architectures. Porosity-free, pressure-tight battery enclosures are driving significant growth in vacuum die casting. In 2025, the region secured substantial investments for EV components, with many funds earmarked for local zinc sourcing to comply with government regulations.

Competition from Aluminum Die Casting

Aluminum’s 2.7 g/cm³ density offers notable weight savings versus zinc, luring OEMs for battery-tray frames despite higher tooling costs ^{[3]“Lifecycle Cost of Zinc vs Aluminum Dies,” Dynacast Technical Paper, dynacast.com}. A leading precision manufacturer expanded its aluminum production capacity in 2025 to supply an electric vehicle manufacturer. Supported by a strong operational base and decades of expertise, Nemak can flexibly adjust its production capacity across metals, prompting zinc die casters to specialize in complex geometries.

Volatility of Zinc Prices

In October 2025, spot zinc experienced a significant surge above futures, coinciding with a decline in LME inventories. Due to limited hedging tools, South American casters face profit fluctuations that directly impact their EBITDA. This was evident in the EBITDA challenges faced by a major industry player in Q3 2024. Such margin instability has made banks hesitant to extend working-capital lines to mid-tier foundries.

*Our forecasts treat driver/restraint impacts as directional, not additive. The impact forecasts reflect baseline growth, mix effects, and variable interactions.

Segment Analysis

By Production Process Type: Pressure Dominates, Vacuum Gains

Pressure die casting captured a 68.12% share of the South American automotive parts zinc die casting market in 2025, supported by mature plant know-how and sub-60-second cycle times. Vacuum die casting’s 7.48% CAGR through 2031 reflects EV demand for porosity-free, leak-tight battery enclosures, narrowing the cost gap as scrap rates fall below 1%.

Vacuum cells require sealed chambers and pumps, increasing capital expenditure. Semi-solid and squeeze variants remain experimental, limited to prototype thin-wall parts. Continuous training and NADCA-standard certification help large casters defend their share against aluminum rivals as the South American automotive parts zinc die casting market pivots to higher-integrity EV applications.

By Alloy Type: Zamak 3 Leads, ZA Alloys Accelerate

Zamak 3 held 50.25% of the South American automotive parts zinc die casting market size in 2025 because of superior castability and cost-effectiveness. ZA alloys are projected to grow at 8.27% CAGR to 2031 as 800-V architectures call for tensile strength up to 425 MPa, beating Zamak 3’s 280 MPa ceiling.

Zamak 5’s chromium micro-addition makes it the alloy of choice for coastal body assemblies, while proprietary blends with copper or magnesium serve niche wear-resistant fuel-system housings. As EV adoption rises, OEMs shift incremental volume into ZA-27 motor shields, increasing the South American automotive parts zinc die-casting market share of high-strength alloys and driving multi-alloy flexibility investments across major plants.

By Application: Engine Parts Lead, E/E Housings Surge

Engine parts represented 35.22% of South America's automotive parts zinc die casting market share in 2025, as oil-pump housings and timing-chain covers leverage zinc’s vibration-damping and dimensional stability. Electrical and electronics housings will grow fastest at 9.13% CAGR, underpinned by CISPR 25 EMI benchmarks.

Thin-wall inverter boxes and DC-DC converter enclosures now specify ZA-27 for combined mechanical and shielding performance, lifting average selling prices. Body assemblies and transmission parts maintain mid-teens contributions, yet lightweighting rules keep shifting brackets and hinges to zinc, padding the South America automotive parts zinc die casting market size allocated to non-powertrain components.

By End-User Vehicle Type: Passenger Vehicles Dominate

Passenger vehicles held 63.15% of demand in 2025 and will expand at a 6.44% CAGR to 2031, as rideshare fleets in São Paulo refresh with hybrid sedans that add 15-20% more zinc per unit. Light commercial vehicles trail but enjoy incremental upside from last-mile e-commerce electrification.

Heavy commercial vehicles choose aluminum for frame-critical parts, leaving zinc to electrical housings. Two-wheelers stay niche yet strategic as premium scooters embed zinc handlebar mounts and footpegs. Overall, consumer credit trends and tariff stability will determine how much of the South American automotive parts zinc die casting market size remains tethered to passenger vehicles.

By Sales Channel: OEM Leads, Aftermarket Accelerates

OEMs accounted for 84.03% of the South American automotive parts zinc die casting market size in 2025, under multi-year contracts linked to zinc indexation. The aftermarket, projected at 6.95% CAGR, profits from an aging 10-year-plus fleet and proliferating e-commerce parts portals. 

Higher aftermarket margins offset its scale disadvantage, yet small foundries must support broader SKU sets and 48-hour ship targets. As EV fleets mature, OEM channels will retain dominance, but aftermarket demand for legacy internal-combustion replacements will ensure sustained baseline volumes across the South American automotive parts zinc die casting industry.

Geography Analysis

Brazil led with a 45.18% revenue share in 2025, due to its production rebound and lightweighting mandates that favor zinc over steel. However, hydropower shortages and rolling blackouts have inflated operating costs, prompting widespread generator installations.

Argentina leverages Law 27 686 to capture localized casting, while the EU-Mercosur pact gradually erodes Europe’s tariff wall, opening export channels. Peru’s 5.86% CAGR reflects a small but fast-growing base anchored in greenfield assembly and Mercosur cumulation benefits, though supply chains are still thin.

Chile’s voluntary lightweighting targets and renewable-heavy power mix introduce both demand potential and intermittency challenges, whereas the rest of South America faces currency instability and underdeveloped supply ecosystems. Collectively, grid reliability and trade policy clarity will decide how much incremental South American automotive parts zinc die casting market size accrues to Brazil versus emerging Andean players.