FRANKFURT (Bloomberg) -- Germany's diesel pollution probe in the wake of the Volkswagen cheating scandal has found signs of elevated emissions in some cars, authorities said.
Regulators and carmakers are in talks about "partly elevated levels of nitrogen oxides" found in raw data from some of the cars in the probe, the Germany's motor transport authority (KBA) said.
The KBA said it is running tests on more than 50 car models of 23 German and foreign auto brands on suspicion of manipulation of NOx emissions from diesel engines.
The KBA is about two-thirds finished with the tests. The authority didn't provide a time frame for the final results from its review, which includes cars from Volkswagen Group's Audi, VW and Porsche brands, as well as BMW, Mercedes-Benz, Peugeot and others.
A spokesman declined to comment on which models had shown signs of elevated NOx pollution.
Vehicles, which range from the tiny Smart ForTwo to the VW Crafter van, were chosen for testing based on new-car registration data, as well as "verified indications" from third parties, the KBA said. The vehicles were evaluated on test beds as well as on the streets.
- Download PDF, above left, for table of cars undergoing tests.
The tests were triggered by Volkswagen's disclosure that it had rigged emissions tests, the KBA said in a statement today. "Since the end of September KBA has been investigating whether further manipulation of emissions, of nitrogen oxides in particular, is taking place in the market," the regulator said.
VW admitted to rigging the engines of about 11 million cars with software that could cheat regulations by turning on full pollution controls only in testing labs, not on the road. The scandal has since spread to include carbon dioxide emissions labels in another 800,000 vehicles, including one type of gasoline engine.
Other major automakers, including BMW and Daimler, have said they didn't manipulate emissions tests.
BMW is not among the companies in talks with the KBA over this probe and therefore doesn’t expect any negative findings, a company spokesman said.
An Opel spokesman said the company is constantly in contact with the KBA but declined to comment on this specific probe.
"We welcome these tests,” Mercedes parent Daimler said. "We have nothing to hide."
After talks with carmakers, the KBA plans to evaluate the data further. Only then, will the agency have sufficient results for any legal action, it said.
Reuters contributed to this report