German car regulators are expanding their investigation into suspected diesel emissions manipulation beyond Volkswagen to more than 50 models from brands including BMW, Mercedes, Ford, Volvo, Nissan and Jaguar Land Rover.

The Kraftfahrt-Bundesamt (KBA) regulator said on Wednesday it would run tests on models made by 23 German and foreign car brands on suspicion of further manipulation of nitrogen oxides emissions.



KBA said the tests were triggered by Volkswagen’s admission it had rigged such tests but also cited “verified indications from third parties regarding unusual pollutants emissions“.

“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,” KBA said in a statement.

The watchdog said it has been comparing readings in a test setting with those from portable meters in real-life tests and two-thirds of the measurements had already been taken.

Germany’s transport minister, Alexander Dobrindt, said in a newspaper interview last weekend that diesel vehicles, including those from foreign manufacturers, would be subjected to strict checks.

VW admitted in September to cheating tests for emissions of nitrogen oxides and the scandal widened with the company’s revelation last week that it had also understated carbon dioxide emissions.

Diesel car brands being investigated by KBA

BMW: 3 Series, 5 Series

Mini Daimler Mercedes: C-Class, CLS, Sprinter, V-Class, Daimler Smart Fortwo

Fiat Chrysler: Alfa Romeo Guilietta, Panda, Ducato, Jeep Cherokee

Ford: Focus, C-Max

Geely: Volvo V60

GM Opel: Astra, Insignia, Zafira

GM: Chevrolet Cruze

Honda: Honda HR-V

Hyundai: iX35, i20

Jaguar Land Rover: Land Rover Evoque

Mazda: Mazda 6

Mitsubishi: ASX

Nissan: Navara

Peugeot: Peugeot 308

Renault: Dacia, Kadjar

Toyota: Auris

VW: Golf, Beetle, Passat, Touran, Touareg, Golf Sportsvan, Polo, Crafter, Amarok; Audi A6, A3; Porsche Macan