AdBlue-Haldex is now Defect Registry. VDA, owner of the AdBlue® trademark, has brought proceedings against our former name. The registry carries on, right here. Why we are changing our name →  ·  What the AdBlue® trademark covers →
AdBlue® / SCR System
Published on 30/05/2026

The 'Magic Liquid' Lie: AdBlue is just water and urea

During a breakdown, some mechanics try to blame the customer: 'You didn't use the brand's official AdBlue', or 'You filled up at a petrol station, the quality was poor'.

The ISO 22241 Standard

AdBlue (or AUS32) is not a magic formula patented by each manufacturer. It is an ultra-strict international standard (ISO 22241) composed of exactly 32.5% pure urea and 67.5% demineralized water.

Whether bought in a can at a supermarket, at the pump, or at a premium price from a dealer, the liquid is technically the same. Categorically refuse this argument if it is used to deny warranty. The defect is in their hardware, not your liquid.

Are you affected by this problem?

Join the national registry to defend your rights under the warranty of hidden defects (Art. 1641).

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AdBlue® is a registered trademark of VDA (Verband der Automobilindustrie). Haldex® is a trademark of its owner. Defect Registry has no connection with these owners or their licensees. What the AdBlue® trademark covers →