StellantisAdBlue / SCR System
Published on 11/05/2026

1.5 BlueHDi Engine: Focus on the timing chain and AdBlue system

The 1.5 BlueHDi engine (DV5) that equips much of the Peugeot, Citroën, and Opel range is at the heart of many controversies. Between timing chain issues and AdBlue failures, owners are often distraught.

The Link Between Mechanical Reliability and Pollution

These engines are pushed to their limits to meet emissions standards. The SCR (AdBlue) system is inseparable from engine operation. An AdBlue failure is not just a faulty accessory; the entire vehicle becomes unusable by software decision.

Global Action Needed

Whether your problem is mechanical (7mm vs 8mm chain) or related to the AdBlue tank, the conclusion is the same: an unacceptable lack of reliability on recent vehicles. Our registry helps map the scale of these defects.

Are you affected by this problem?

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

Register my case