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What Excess AdBlue Produces on the Bodywork

Model: (Various brands) Various
Part: AdBlue warning light

Video tutorial

Be very careful when topping up AdBlue, as keeping the tank too empty causes urea to crystallise inside (meaning excess air inside promotes crystallisation). It is also true that letting urea spill from the cap onto the bodywork causes an unpleasant residue that sticks to the surface, although it does not cause permanent damage.

The video shows the residue from a top-up that spilled from the cap and stained the entire side of the vehicle, down to the tyres. When it drips, you may not notice it as it is transparent, but it crystallises later.

Therefore, wipe it off immediately with a cloth and some water: it may not damage the bodywork, but it looks really unsightly.


Updated on 15 October 2026 by ScegliAuto


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