Owners of diesel vehicles are increasingly faced with breakdowns linked to the AdBlue system. This technology, mandatory on recent diesel vehicles, aims to reduce polluting emissions by transforming nitrogen oxides into water vapor and harmless nitrogen. Unfortunately, its operation proves problematic, pushing some motorists towards alternative solutions, which are not always legal.
A practice strictly prohibited by law
Deactivating AdBlue constitutes an offense under the Highway Code. Article L318-3 is very clear: any removal or degradation of an anti-pollution device is punishable by a fine of up to 7,500 euros.. This sanction applies to both the owner of the vehicle and the professional who carried out the intervention. Garages offering this service are therefore exposed to legal action.
French legislation considers this manipulation as a direct attack on the environment and public health. Indeed, the AdBlue system plays a crucial role in reducing polluting emissions from diesel vehicles. Its deactivation leads to a significant increase in toxic releases into the atmosphere, compromising collective efforts to combat air pollution.
Serious consequences for motorists
Beyond the fine, deactivating AdBlue causes several complications for the vehicle owner. First of all, this modification constitutes a hidden defect upon resale. A buyer discovering this manipulation could legally cancel the sale and demand a full refund of the vehicle.
Deactivation also impacts the value of the vehicle. Automotive professionals are now very vigilant on this point during transactions. A vehicle whose AdBlue system has been deactivated loses its value considerably on the second-hand market.
From January 2025, technical inspection centers will be equipped with new diagnostic tools capable of detecting these changes. The vehicles concerned will have their technical inspection certificate refused, effectively rendering them unusable on public roads. Owners will then have to incur significant costs to bring their vehicle into compliance.
Legal alternatives exist
Faced with the recurring problems of AdBlue, legal solutions are being developed. Car manufacturers, aware of the difficulties encountered by their customers, are starting to offer repair support programs. The Stellantis group, particularly affected by these dysfunctions, notably implemented special coverage for defective parts.
Motorists can also adopt preventive measures to limit the risk of breakdowns. The use of anti-crystallizing agents, the choice of quality AdBlue and regular maintenance of the system can significantly reduce problems. Drivers have every interest in favoring these options rather than resorting to illegal deactivation.
Consumer associations are also mobilizing to defend the interests of motorists. Collective legal actions aim to obtain better coverage of repairs by manufacturers. This pressure is starting to bear fruit, with the appearance of extended warranties and specific assistance programs.
- Deactivation of AdBlue is strictly prohibited and punishable by a fine of 7,500 euros
- This manipulation leads to the loss of value of the vehicle and the impossibility of passing the technical inspection from 2025
- Legal solutions exist, in particular via manufacturers’ support programs and the adoption of preventive measures.
