HOW TO CHECK YOUR DIESEL’S EXHAUST FLUID LEVEL (DEF)

Close-up of a car’s exhaust fluid tank with a bright blue cap, with the caption “How to Check Your Diesel’s Exhaust Fluid Level”

Almost all diesel-powered vehicles built since 2010 require the use of Diesel Exhaust Fluid (DEF). DEF is made from pure urea and de-ionized water, is a non-toxic, colorless, odorless, and non-flammable fluid. DEF is responsible for moderating your vehicle’s emissions and meeting EPA guidelines…