Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue[3]) is a liquid used to reduce the amount of air pollution created by a diesel engine.

AdBlue® is an aqueous solution designed exclusively for diesel vehicles fitted with a selective catalytic reduction (SCR) system. This technology has enabled diesel vehicle manufacturers to …

AdBlue is a liquid that’s added to diesel vehicles exhaust to help reduce harmful exhaust emissions (NOx). It turns harmful pollutants into harmless gases that do less damage to the …

Aug 17, 2024 · What is AdBlue (aka diesel exhaust fluid - DEF) In a nutshell, AdBlue is a liquid substance that can be used in diesel engines with selective catalytic reduction.

Jan 17, 2025 · The AdBlue system is a vital technology that enables diesel vehicles to meet strict environmental standards without compromising performance. Understanding what AdBlue is, …

May 20, 2025 · AdBlue®, a diesel exhaust fluid (DEF), plays a vital role in helping diesel vehicles meet stringent emission standards. This guide delves into what AdBlue® is, how it works, and …

Feb 25, 2025 · AdBlue is a fluid used in diesel engines to reduce harmful emissions - so, if the AdBlue tank runs dry, the system detects this and triggers a warning on your dashboard.

Sep 12, 2022 · AdBlue is a diesel exhaust fluid that is used in vehicles equipped with Selective Catalytic Reduction (SCR) technology to reduce emissions of oxides of nitrogen (NOx).

Aug 15, 2025 · AdBlue is a diesel exhaust fluid (DEF) that helps reduce a diesel vehicle’s NOx exhaust emissions. It’s stored in a tank with a blue filler cap, which is separate from the fuel tank.

Jul 6, 2025 · You've surely heard of brake fluid, fuel, and lots of other liquids needed to run a diesel vehicle. But what's AdBlue fluid? And do all diesel vehicles need it?