Stable Supply of Diesel Exhaust Fluid... Government: "2.8 Months of Inventory Secured"
99.5% of Gas Stations Selling as Usual
Prices Down Compared to Last Year
6,000 Tons to Be Imported by April
The Ministry of Climate, Energy and Environment announced on March 26 that the domestic supply of diesel exhaust fluid (DEF) for vehicles remains stable, with most gas stations selling DEF as usual.
According to the ministry, as of March 23, the inventory of urea for vehicles and DEF—including both public reserves and private stock—was sufficient to last over 2.8 months. In addition, approximately 6,000 tons of urea are expected to be imported by April, and the government believes that there are no short-term supply concerns.
The situation at gas stations is also stable. As of 9 a.m. the previous day, 4,233 out of 4,253 gas stations nationwide (99.5%) were confirmed to be selling DEF for vehicles as usual.
Prices are also showing signs of stability. As of March 24, the average retail price of DEF at gas stations was 1,528 won per liter, which is lower than in March 2023 (1,679.21 won), March 2024 (1,630.70 won), and March 2025 (1,569.66 won).
Consumers can check the availability of DEF and its prices at nearby gas stations through the Opinet website or mobile app.
The government is also strengthening cooperation with the industry. On March 24, the Ministry of Climate, Energy and Environment held a meeting near Seoul Station with major DEF manufacturers to review the supply situation. The ministry requested that shipment volumes be maintained at normal levels and that imports of urea, the raw material, be increased as early as possible.
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Kim Jinshik, Director General of the Air Quality Policy Bureau at the ministry, stated, "Domestic reserves of urea are more than adequate. Consumers who need DEF can purchase it as usual at gas stations, including through automatic dispensers." He added, "Together with related agencies, we plan to thoroughly monitor the entire manufacturing and distribution process and work closely with the industry to ensure that DEF supply remains uninterrupted."
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