Tenneco Inc. designs, manufactures, and sells clean air, powertrain, and ride performance products and systems for light vehicle, commercial truck, off-highway, industrial, and aftermarket customers worldwide. The company offers clean air products and systems, including catalytic converters and diesel oxidation catalysts, diesel particulate filters, burner systems, lean nitrogen oxide (NOx) traps, hydrocarbon vaporizers and injectors, selective catalytic reduction (SCR) systems, SCR-coated diesel particulate filters systems, urea dosing systems, four-way catalysts, alternative NOx reduction technologies, mufflers and resonators, fabricated exhaust manifolds, pipes, hydroformed assemblies, elastomeric hangers and isolators, and aftertreatment control units.

It also provides powertrain products and systems, such as pistons, piston rings, cylinder liners, valve seats and guides, bearings, spark plugs, valve train products, system protection products, and seals and gaskets; and aftermarket products, which include ride control parts and emission controls, as well as noise, vibration, and harshness (NVH) performance materials.

In addition, the company offers ride performance products and systems comprising shock absorbers and struts, and NVH performance materials, as well as a product portfolio of electronically controlled ride performance technology; and motor parts, including chassis parts, braking products, and gaskets and seals, as well as filtration parts, lighting products, and ignition products. The company was formerly known as Tenneco Automotive Inc. and changed its name to Tenneco Inc. in 2005. Tenneco Inc. was founded in 1888 and is headquartered in Lake Forest, Illinois.