We thought the worst was behind us, but it looks like “Dieselgate” is still wide open and overflowing with yet another controversy. Renault has fallen under scrutiny following allegations by Deutsche Unwelthilfe, a German environmental-protection group. The accusations state that the manufacturer’s Espace, a luxury crossover, is belching out copious amounts of nitrous oxide emissions.

The vehicle in question is the Renault Espace, which was reported to emit 25 times the legal amount of nitrous oxide under EU regulations.

Tests were performed at a Swiss laboratory, and were commissioned by Deutsche Unwelthilfe. When at operating temperature, the vehicle’s 1.6-liter inline four is reported to exhale 25 times the legal amount of exhaust emissions allowed under EU standards.

The results have yet to be independently verified by a third-party organization, but it appears they have nothing to do with VW’s test-defeating technology, which was revealed in September. Rather, the issue seems to be that EU rules implicitly allow engines to be tested at cold temperatures, which can produce favorable emissions test outcomes.

Maya Vautier, a spokeswoman for Renault, labeled the Deutsche Unwelthilfe report as “not conclusive.” She released a statement on behalf of the automaker: “The test procedures used by the University of Bern are not all compliant with European regulations. The report shows important variations in test findings which are not conclusive and require ‘additional measurement.’ Renault is endeavoring to fully understand the tests in detail especially in light of the findings published in August 2015 by the independent German institute ADAC which tested the Espace model and concluded that it complied with regulations.”

Is this yet another black mark upon the diesel market? Or just a blustering bluff put on by a troublesome organization? Let us know what you think in the comments below.