Diesel Engine Catalyst Market Report 2026

The diesel engine catalyst market size has grown strongly in recent years. It will grow from $35.17 billion in 2025 to $37.82 billion in 2026 at a compound annual growth rate (CAGR) of 7.6%. The growth in the historic period can be attributed to emission regulations enforcement, diesel vehicle penetration, adoption of oxidation catalysts, urban air quality concerns, growth of heavy-duty vehicles.

The diesel engine catalyst market size is expected to see strong growth in the next few years. It will grow to $49.34 billion in 2030 at a compound annual growth rate (CAGR) of 6.9%. The growth in the forecast period can be attributed to tightening emission norms, demand for low-emission diesel engines, advancement in catalyst formulations, expansion of off-road machinery, sustainability mandates. Major trends in the forecast period include stricter diesel emission compliance, rising integration of multi-stage aftertreatment systems, demand for precious metal optimization, growth of off-road emission controls, retrofit of legacy diesel fleets.

The expansion of the commercial vehicle sector is anticipated to drive growth in the diesel engine catalyst market moving forward. Commercial vehicles encompass motor vehicles used for transporting goods or paying passengers, categorized by their gross vehicle weight rating (GVWR) or passenger capacity. Growth in this sector is spurred by economic expansion, heightened demand for freight transport fueled by e-commerce and infrastructure development, and the imperative to replace older trucks with more advanced, fuel-efficient models. Diesel engine catalysts in commercial vehicles mitigate emissions of pollutants such as NOx, CO, and particulate matter, ensuring compliance with stringent environmental regulations while enhancing fuel efficiency. For instance, in April 2024, new EU sales of commercial vans surged by 12.6% compared to the same period in 2023, reaching nearly 400,000 units. Similarly, commercial bus registrations rose by 23.3%, totaling 9,624 units. Consequently, the growth in the commercial vehicle sector is underpinning the expansion of the diesel engine catalyst market.

Key players in the diesel engine catalyst market are concentrating on advancing products such as NOx adsorbers to better cater to customer needs. NOx adsorbers, also known as lean NOx traps (LNTs), are emission control devices deployed in internal combustion engines to curtail nitrogen oxide (NOx) emissions. For example, in June 2024, Veneporte, S.A., a Portugal-based auto parts manufacturer, launched new lean NOx trap products renowned for their effectiveness in significantly reducing harmful emissions from diesel engines. This release underscores Veneporte's commitment to innovation and sustainability, providing customers with state-of-the-art technologies for a cleaner future and delivering fresh emission control solutions to the market.

In February 2024, Hensel Recycling GmbH, a Germany-based leader in precious metals recycling, acquired Red Fox Resources to optimize logistics, thereby accelerating service delivery, lowering shipping costs, and reducing carbon emissions. Red Fox Resources, a US-based provider of diesel engine catalysts, was the target of this undisclosed acquisition, aimed at strengthening Hensel Recycling's operational efficiency and environmental footprint.

Major companies operating in the diesel engine catalyst market report include BASF SE, Continental AG, Cummins Inc., Faurecia SE, Johnson Matthey plc, Kubota Corporation, Tenneco Inc., Eberspacher Climate Control Systems, Umicore N.V., NGK Insulators Ltd., IBIDEN CO. LTD., Cataler Corporation, Bosal Nederland B.V., Cormetech Inc., Nett Technologies Inc., Clean Diesel Technologies Advanced Materials Inc., DCL International Inc., CDTi Advanced Materials Inc., Haldor Topsoe Holding A/S, SANGO Co. Ltd.

Asia-Pacific was the largest region in the diesel engine catalyst market in 2025. The regions covered in the diesel engine catalyst market report include Asia-Pacific, South East Asia, Western Europe, Eastern Europe, North America, South America, Middle East, Africa. The countries covered in the diesel engine catalyst market report include Australia, Brazil, China, France, Germany, India, Indonesia, Japan, Taiwan, Russia, South Korea, UK, USA, Canada, Italy, Spain.

The diesel engine catalyst market consists of sales of ammonia slip catalysts (ASC), lean NOx catalysts (LNC), catalyzed soot filters (CSF), methane catalysts, and three-way catalysts (TWC). Values in this market are ‘factory gate’ values, that is the value of goods sold by the manufacturers or creators of the goods, whether to other entities (including downstream manufacturers, wholesalers, distributors and retailers) or directly to end customers. The value of goods in this market includes related services sold by the creators of the goods.

The market value is defined as the revenues that enterprises gain from the sale of goods and/or services within the specified market and geography through sales, grants, or donations in terms of the currency (in USD unless otherwise specified).

The revenues for a specified geography are consumption values that are revenues generated by organizations in the specified geography within the market, irrespective of where they are produced. It does not include revenues from resales along the supply chain, either further along the supply chain or as part of other products.

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