Diesel Engine Catalyst Market Size and Outlook 2031

Report Description

Forecast Period	2027-2031
Market Size (2025)	USD 39.01 Billion
CAGR (2026-2031)	8.12%
Fastest Growing Segment	Off-Road
Largest Market	Asia Pacific
Market Size (2031)	USD 62.32 Billion

Market Overview

The Global Diesel Engine Catalyst Market will grow from USD 39.01 Billion in 2025 to USD 62.32 Billion by 2031 at a 8.12% CAGR. Diesel engine catalysts are specialized emission control components, such as diesel oxidation catalysts and selective catalytic reduction systems, engineered to convert hazardous exhaust pollutants into benign substances. The market is primarily propelled by rigorous international environmental standards requiring lower nitrogen oxide and particulate emissions, combined with the sustained reliance on diesel powertrains for heavy-duty commercial transport due to their superior torque and thermal efficiency. This dependency is evident in recent industry statistics regarding fleet composition. According to the European Automobile Manufacturers' Association, in 2023, diesel engines maintained a dominant position by accounting for 95.7% of new heavy-duty truck registrations in the European Union.

However, the sector faces a significant challenge arising from the accelerating global transition toward electrification and alternative energy powertrains. The widespread adoption of battery electric vehicles and hydrogen fuel cell technologies, driven by government decarbonization mandates, threatens to steadily diminish the production volumes of internal combustion engines. This shift serves as a substantial impediment to long-term market expansion by reducing the overall addressable market for traditional exhaust aftertreatment hardware.

Key Market Drivers

The implementation of stringent global emission standards serves as a critical market driver. Regulatory bodies are enforcing rigorous mandates necessitating advanced filtration technologies to curb nitrogen oxides and particulate matter. This pressure compels manufacturers to install complex aftertreatment systems to ensure compliance with evolving legislative frameworks. A pivotal development recently occurred regarding Euro 7 standards. According to the European Council, April 2024, in the 'Euro 7: Council adopts new rules on emission limits', the newly approved regulation stipulates a specific timeline requiring new heavy-duty vehicles to comply with updated limits 48 months after the legislation enters into force. Such mandates guarantee sustained demand by legally binding engine production to high-efficiency exhaust control hardware.

Simultaneously, rising demand for off-highway construction equipment and heavy commercial vehicles underscores the reliance on diesel powertrains. Sectors like mining and logistics continue to utilize diesel engines, driving emission control system consumption. This trend is reflected in the performance of industrial manufacturers. According to Caterpillar Inc., February 2024, in the '4Q and Full-Year 2023 Financial Results', full-year sales and revenues reached $67.1 billion, a 13% increase compared to 2022. This surge correlates with increased procurement of aftertreatment components. Furthermore, the on-road sector displays similar resilience. According to the European Automobile Manufacturers' Association, August 2024, in 'New Commercial Vehicle Registrations: H1 2024', new EU truck registrations increased by 3% to 183,295 units. These figures illustrate that the core addressable market remains robust.

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Key Market Challenges

The accelerating global transition toward electrification and alternative energy powertrains constitutes a fundamental structural risk to the Global Diesel Engine Catalyst Market. As governments enforce aggressive decarbonization mandates and set definite timelines for phasing out internal combustion engines, original equipment manufacturers are increasingly diverting R&D budgets away from exhaust aftertreatment development in favor of battery electric and hydrogen technologies. This diversion inevitably reduces the total addressable market for diesel oxidation catalysts and selective catalytic reduction systems, as the displacement of conventional engines removes the need for emission control hardware entirely.

This contraction in demand is already observable in key regional markets where regulatory pressure is most acute. According to the European Automobile Manufacturers’ Association, in 2024, the market share of newly registered diesel passenger cars in the European Union fell to 11.9%, dropping below battery-electric vehicles which captured 13.6% of the market for the first time. Such a statistical shift underscores the speed at which electric mobility is eroding the traditional diesel consumer base. As this trend expands from passenger segments into light and eventually heavy-duty commercial applications, catalyst manufacturers face a sustained decline in production volumes and long-term revenue potential.

Key Market Trends

The implementation of advanced Platinum Group Metal (PGM) thrifting strategies has become vital for catalyst manufacturers aiming to mitigate input cost volatility. Engineers are increasingly reformulating washcoats to substitute expensive palladium with platinum, optimizing precious metal ratios in oxidation catalysts without compromising compliance. This strategic substitution is evident in material consumption patterns within the automotive sector. According to the World Platinum Investment Council, May 2024, in the 'Platinum Quarterly Q1 2024', automotive platinum demand is forecast to grow by 2% to 3,269 koz in 2024, driven by the substitution of platinum for palladium in aftertreatment systems. This shift allows suppliers to stabilize production costs despite fluctuating commodity markets.

Simultaneously, there is rising demand for remanufactured and recycled catalyst systems, driven by the need to lower fleet maintenance costs and meet sustainability targets. Operators are utilizing closed-loop supply chains to recover precious metals and refurbish diesel particulate filters for reuse in heavy-duty applications. This trend toward circular economy models is reflected in industrial performance. According to Stellantis N.V., February 2024, in the 'Full Year 2023 Results', the Circular Economy business unit achieved an 18% year-on-year increase in revenue, highlighting the accelerating commercial traction of remanufactured components including emission control hardware.

Segmental Insights

The Off-Road segment is positioned as the fastest-growing category within the Global Diesel Engine Catalyst Market. This accelerated expansion is primarily driven by the implementation of stringent emission standards for non-road mobile machinery, which now parallel the rigorous mandates previously established for on-road vehicles. Regulatory bodies such as the United States Environmental Protection Agency and the European Union have enforced Tier 4 and Stage V standards, respectively, requiring substantial reductions in nitrogen oxides and particulate matter. Consequently, manufacturers in the construction and agricultural sectors are increasingly integrating catalytic converters to ensure compliance, thereby fueling segment growth.

Regional Insights

Asia Pacific holds the leading position in the global diesel engine catalyst market, primarily due to the region's expansive automotive manufacturing sector and the implementation of stringent emission norms. Nations such as China and India have enforced rigorous frameworks, including China VI and Bharat Stage VI standards, which compel manufacturers to adopt exhaust after-treatment systems for reducing nitrogen oxides and particulate matter. Consequently, the high production of commercial vehicles and heavy-duty equipment, coupled with these mandatory compliance requirements, drives the substantial demand for diesel oxidation catalysts and selective catalytic reduction technologies across the region.

Recent Developments

In November 2025, Tenneco Clean Air India Limited, a subsidiary of the global Tier-1 automotive component supplier, successfully listed its shares on the National Stock Exchange of India (NSE) and Bombay Stock Exchange (BSE) following a strong initial public offering. The company, which specializes in manufacturing pollution control systems including catalytic converters and diesel particulate filters, debuted with a significant premium over its issue price. The listing highlighted the robust market demand for emission control technologies in the commercial vehicle and off-highway sectors, where the company holds a leading market share in supplying clean air solutions to major original equipment manufacturers.
In May 2025, Johnson Matthey announced a definitive agreement to sell its Catalyst Technologies business to Honeywell for approximately $2.4 billion, a strategic decision aimed at streamlining its portfolio to focus on its core Clean Air and Platinum Group Metals (PGM) Services divisions. While the divestment involved the company’s process catalysis and licensing unit, the announcement clarified that the Automotive Catalysts business, which sits within the Clean Air division, would remain a central pillar of the group. This move reinforces the company’s commitment to the global diesel and automotive catalyst market as it continues to generate significant cash flow during the industry's transition.
In September 2024, Cummins India Limited launched the Retrofit Aftertreatment System (RAS), an innovative emission control solution specifically engineered for existing diesel generator sets. The new product utilizes Diesel Oxidation Catalyst (DOC) and Particulate Filter technology to reduce Particulate Matter, Carbon Monoxide, and Hydrocarbon emissions by up to 90%. This launch was positioned as a strategic move to help customers comply with the latest Central Pollution Control Board (CPCB) emission regulations (CPCBII and CPCBI) without needing to replace their entire engine assets, thereby extending the operational life of diesel power generation equipment.
In April 2024, FEV Group presented breakthrough research on a new aftertreatment system configuration designed to meet the stringent CARB Tier 5 emission standards for heavy-duty diesel engines. During the SAE WCX Congress, the company showcased a technical paper proposing an advanced architecture that includes a close-coupled Diesel Oxidation Catalyst (DOC) and Selective Catalytic Reduction (SCR) catalyst, or alternatively, an exhaust gas heater upstream of the main SCR component. This research addresses the critical challenge of reducing nitrogen oxide emissions by 90% and particulate matter by 75% compared to current Tier 4 standards, demonstrating a viable pathway for future diesel engine compliance.

Key Market Players

Umicore NV
BASF SE
Johnson Matthey Plc
Corning Incorporated
Tenneco Inc.
Bosch GmbH
Denso Corporation
Faurecia S.A.
Haldor Topsoe A/S
Continental AG

By Technology	By Application	By Sales Channel	By Region
Diesel Oxidation Catalysts (DOC) Diesel Particulate Filter (DPF) Selective Catalytic Reduction (SCR) Others	On-Road Off-Road	OEM Aftermarket	North America Europe Asia Pacific South America Middle East & Africa

Report Scope:

In this report, the Global Diesel Engine Catalyst Market has been segmented into the following categories, in addition to the industry trends which have also been detailed below:

Diesel Engine Catalyst Market, By Technology:

Diesel Oxidation Catalysts (DOC)
Diesel Particulate Filter (DPF)
Selective Catalytic Reduction (SCR)
Others

Diesel Engine Catalyst Market, By Application:

On-Road
Off-Road

Diesel Engine Catalyst Market, By Sales Channel:

OEM
Aftermarket

Diesel Engine Catalyst Market, By Region:

North America

United States
Canada
Mexico

Europe

France
United Kingdom
Italy
Germany
Spain

Asia Pacific

China
India
Japan
Australia
South Korea

South America

Brazil
Argentina
Colombia

Middle East & Africa

South Africa
Saudi Arabia
UAE

Competitive Landscape

Company Profiles: Detailed analysis of the major companies present in the Global Diesel Engine Catalyst Market.

Available Customizations:

Global Diesel Engine Catalyst Market report with the given market data, TechSci Research offers customizations according to a company's specific needs. The following customization options are available for the report:

Company Information

Detailed analysis and profiling of additional market players (up to five).

Global Diesel Engine Catalyst Market is an upcoming report to be released soon. If you wish an early delivery of this report or want to confirm the date of release, please contact us at [email protected]

Table of content

1. Product Overview

1.1. Market Definition

1.2. Scope of the Market

1.2.1. Markets Covered

1.2.2. Years Considered for Study

1.2.3. Key Market Segmentations

2. Research Methodology

2.1. Objective of the Study

2.2. Baseline Methodology

2.3. Key Industry Partners

2.4. Major Association and Secondary Sources

2.5. Forecasting Methodology

2.6. Data Triangulation & Validation

2.7. Assumptions and Limitations

3. Executive Summary

3.1. Overview of the Market

3.2. Overview of Key Market Segmentations

3.3. Overview of Key Market Players

3.4. Overview of Key Regions/Countries

3.5. Overview of Market Drivers, Challenges, Trends

4. Voice of Customer

5. Global Diesel Engine Catalyst Market Outlook

5.1. Market Size & Forecast

5.1.1. By Value

5.2. Market Share & Forecast

5.2.1. By Technology (Diesel Oxidation Catalysts (DOC), Diesel Particulate Filter (DPF), Selective Catalytic Reduction (SCR), Others)

5.2.2. By Application (On-Road, Off-Road)

5.2.3. By Sales Channel (OEM, Aftermarket)

5.2.4. By Region

5.2.5. By Company (2025)

5.3. Market Map

6. North America Diesel Engine Catalyst Market Outlook

6.1. Market Size & Forecast

6.1.1. By Value

6.2. Market Share & Forecast

6.2.1. By Technology

6.2.2. By Application

6.2.3. By Sales Channel

6.2.4. By Country

6.3. North America: Country Analysis

6.3.1. United States Diesel Engine Catalyst Market Outlook

6.3.1.1. Market Size & Forecast

6.3.1.1.1. By Value

6.3.1.2. Market Share & Forecast

6.3.1.2.1. By Technology

6.3.1.2.2. By Application

6.3.1.2.3. By Sales Channel

6.3.2. Canada Diesel Engine Catalyst Market Outlook

6.3.2.1. Market Size & Forecast

6.3.2.1.1. By Value

6.3.2.2. Market Share & Forecast

6.3.2.2.1. By Technology

6.3.2.2.2. By Application

6.3.2.2.3. By Sales Channel

6.3.3. Mexico Diesel Engine Catalyst Market Outlook

6.3.3.1. Market Size & Forecast

6.3.3.1.1. By Value

6.3.3.2. Market Share & Forecast

6.3.3.2.1. By Technology

6.3.3.2.2. By Application

6.3.3.2.3. By Sales Channel

7. Europe Diesel Engine Catalyst Market Outlook

7.1. Market Size & Forecast

7.1.1. By Value

7.2. Market Share & Forecast

7.2.1. By Technology

7.2.2. By Application

7.2.3. By Sales Channel

7.2.4. By Country

7.3. Europe: Country Analysis

7.3.1. Germany Diesel Engine Catalyst Market Outlook

7.3.1.1. Market Size & Forecast

7.3.1.1.1. By Value

7.3.1.2. Market Share & Forecast

7.3.1.2.1. By Technology

7.3.1.2.2. By Application

7.3.1.2.3. By Sales Channel

7.3.2. France Diesel Engine Catalyst Market Outlook

7.3.2.1. Market Size & Forecast

7.3.2.1.1. By Value

7.3.2.2. Market Share & Forecast

7.3.2.2.1. By Technology

7.3.2.2.2. By Application

7.3.2.2.3. By Sales Channel

7.3.3. United Kingdom Diesel Engine Catalyst Market Outlook

7.3.3.1. Market Size & Forecast

7.3.3.1.1. By Value

7.3.3.2. Market Share & Forecast

7.3.3.2.1. By Technology

7.3.3.2.2. By Application

7.3.3.2.3. By Sales Channel

7.3.4. Italy Diesel Engine Catalyst Market Outlook

7.3.4.1. Market Size & Forecast

7.3.4.1.1. By Value

7.3.4.2. Market Share & Forecast

7.3.4.2.1. By Technology

7.3.4.2.2. By Application

7.3.4.2.3. By Sales Channel

7.3.5. Spain Diesel Engine Catalyst Market Outlook

7.3.5.1. Market Size & Forecast

7.3.5.1.1. By Value

7.3.5.2. Market Share & Forecast

7.3.5.2.1. By Technology

7.3.5.2.2. By Application

7.3.5.2.3. By Sales Channel

8. Asia Pacific Diesel Engine Catalyst Market Outlook

8.1. Market Size & Forecast

8.1.1. By Value

8.2. Market Share & Forecast

8.2.1. By Technology

8.2.2. By Application

8.2.3. By Sales Channel

8.2.4. By Country

8.3. Asia Pacific: Country Analysis

8.3.1. China Diesel Engine Catalyst Market Outlook

8.3.1.1. Market Size & Forecast

8.3.1.1.1. By Value

8.3.1.2. Market Share & Forecast

8.3.1.2.1. By Technology

8.3.1.2.2. By Application

8.3.1.2.3. By Sales Channel

8.3.2. India Diesel Engine Catalyst Market Outlook

8.3.2.1. Market Size & Forecast

8.3.2.1.1. By Value

8.3.2.2. Market Share & Forecast

8.3.2.2.1. By Technology

8.3.2.2.2. By Application

8.3.2.2.3. By Sales Channel

8.3.3. Japan Diesel Engine Catalyst Market Outlook

8.3.3.1. Market Size & Forecast

8.3.3.1.1. By Value

8.3.3.2. Market Share & Forecast

8.3.3.2.1. By Technology

8.3.3.2.2. By Application

8.3.3.2.3. By Sales Channel

8.3.4. South Korea Diesel Engine Catalyst Market Outlook

8.3.4.1. Market Size & Forecast

8.3.4.1.1. By Value

8.3.4.2. Market Share & Forecast

8.3.4.2.1. By Technology

8.3.4.2.2. By Application

8.3.4.2.3. By Sales Channel

8.3.5. Australia Diesel Engine Catalyst Market Outlook

8.3.5.1. Market Size & Forecast

8.3.5.1.1. By Value

8.3.5.2. Market Share & Forecast

8.3.5.2.1. By Technology

8.3.5.2.2. By Application

8.3.5.2.3. By Sales Channel

9. Middle East & Africa Diesel Engine Catalyst Market Outlook

9.1. Market Size & Forecast

9.1.1. By Value

9.2. Market Share & Forecast

9.2.1. By Technology

9.2.2. By Application

9.2.3. By Sales Channel

9.2.4. By Country

9.3. Middle East & Africa: Country Analysis

9.3.1. Saudi Arabia Diesel Engine Catalyst Market Outlook

9.3.1.1. Market Size & Forecast

9.3.1.1.1. By Value

9.3.1.2. Market Share & Forecast

9.3.1.2.1. By Technology

9.3.1.2.2. By Application

9.3.1.2.3. By Sales Channel

9.3.2. UAE Diesel Engine Catalyst Market Outlook

9.3.2.1. Market Size & Forecast

9.3.2.1.1. By Value

9.3.2.2. Market Share & Forecast

9.3.2.2.1. By Technology

9.3.2.2.2. By Application

9.3.2.2.3. By Sales Channel

9.3.3. South Africa Diesel Engine Catalyst Market Outlook

9.3.3.1. Market Size & Forecast

9.3.3.1.1. By Value

9.3.3.2. Market Share & Forecast

9.3.3.2.1. By Technology

9.3.3.2.2. By Application

9.3.3.2.3. By Sales Channel

10. South America Diesel Engine Catalyst Market Outlook

10.1. Market Size & Forecast

10.1.1. By Value

10.2. Market Share & Forecast

10.2.1. By Technology

10.2.2. By Application

10.2.3. By Sales Channel

10.2.4. By Country

10.3. South America: Country Analysis

10.3.1. Brazil Diesel Engine Catalyst Market Outlook

10.3.1.1. Market Size & Forecast

10.3.1.1.1. By Value

10.3.1.2. Market Share & Forecast

10.3.1.2.1. By Technology

10.3.1.2.2. By Application

10.3.1.2.3. By Sales Channel

10.3.2. Colombia Diesel Engine Catalyst Market Outlook

10.3.2.1. Market Size & Forecast

10.3.2.1.1. By Value

10.3.2.2. Market Share & Forecast

10.3.2.2.1. By Technology

10.3.2.2.2. By Application

10.3.2.2.3. By Sales Channel

10.3.3. Argentina Diesel Engine Catalyst Market Outlook

10.3.3.1. Market Size & Forecast

10.3.3.1.1. By Value

10.3.3.2. Market Share & Forecast

10.3.3.2.1. By Technology

10.3.3.2.2. By Application

10.3.3.2.3. By Sales Channel

11. Market Dynamics

11.1. Drivers

11.2. Challenges

12. Market Trends & Developments

12.1. Merger & Acquisition (If Any)

12.2. Product Launches (If Any)

12.3. Recent Developments

13. Global Diesel Engine Catalyst Market: SWOT Analysis

14. Porter's Five Forces Analysis

14.1. Competition in the Industry

14.2. Potential of New Entrants

14.3. Power of Suppliers

14.4. Power of Customers

14.5. Threat of Substitute Products

15. Competitive Landscape

15.1. Umicore NV

15.1.1. Business Overview

15.1.2. Products & Services

15.1.3. Recent Developments

15.1.4. Key Personnel

15.1.5. SWOT Analysis

15.2. BASF SE

15.3. Johnson Matthey Plc

15.4. Corning Incorporated

15.5. Tenneco Inc.

15.6. Bosch GmbH

15.7. Denso Corporation

15.8. Faurecia S.A.

15.9. Haldor Topsoe A/S

15.10. Continental AG

16. Strategic Recommendations

17. About Us & Disclaimer

Report Description

Table of content

Figures and Tables

Frequently asked questions

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