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Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Standard Motor Products, Inc. and its subsidiaries (referred to hereinafter in these notes to the consolidated financial statements as “we,” “us,” “our,” “SMP,” or the “Company”) is a leading manufacturer and distributor of premium replacement parts in the automotive aftermarket, and a custom-engineered solutions provider to vehicle and equipment manufacturers in diverse non-aftermarket end markets. Our automotive aftermarket is comprised of three segments, Vehicle Control, Temperature Control and Nissens Automotive, while our Engineered Solutions segment offers a broad array of conventional and future-oriented technologies in markets for commercial and light vehicles, construction, agriculture, power sports, marine, hydraulics and lawn and garden. We sell our products primarily to retailers, warehouse distributors, original equipment manufacturers and original equipment service part operations in the United States, Europe, Canada, Mexico, and other foreign countries. In addition to our legacy SMP business, we acquired our fourth business segment, European automotive aftermarket parts supplier AX V Nissens III ApS (now known as SMP Nissens III ApS) and its direct and indirect subsidiaries (“Nissens Automotive”), in the fourth quarter of 2024. Nissens Automotive develops, manufactures and markets products in the areas of air conditioning climate systems, engine cooling, and engine efficiency within the automotive aftermarket industry, primarily in Europe. For further information and disclosures regarding the Nissens Automotive acquisition, refer to Note 3, “Business Combinations.” These unaudited consolidated financial statements include our accounts and all entities that we control. In addition, we use the equity method to include our share of the results of investments in unconsolidated affiliates in which we do not have a controlling financial interest but have the ability to exercise significant influence. Generally our ownership in these unconsolidated affiliates is 50% or less. All significant inter-company items have been eliminated. These unaudited consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements and should be read in conjunction with the audited consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2024. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair statement have been included. The results of operations for the interim periods are not necessarily indicative of the results of operations for the entire year.