Volkswagen Group's brands were big winners in a German market up 22 percent in September.
Registrations rose to 244,622 last month, the KBA motor transport authority said in a statement on Wednesday.
Sales had slumped by 30 percent in September last year as automakers including VW Group could not offer enough models that complied with the new WLTP testing standards introduced on Sept. 1.
This year's September result is an "aberration," an industry source said.
Among VW Group brands, Porsche's registrations rose by 431 percent and Audi's sales were up 148 percent last month. Both brands were severely affected by supply disruptions caused by WLTP last year,
VW brand was up 96 percent, Seat sales rose 79 percent and Skoda's registrations increased by 28 percent.
Other automakers that had a good month were Honda, up 118 percent; Renault, up 51 percent; Hyundai, up 36 percent; Dacia, up 32 percent; Fiat up 27 percent; Ford, up 26 percent; and Mercedes up 20 percent.
Brands which saw sales decline steeply were Jaguar, down 47 percent; Peugeot, down 27 percent; BMW, down 19 percent; and Opel down 9 percent.
Download PDF here for German registrations by brand in September.
Sales to business fleets increased by 24 percent while sales to private customers rose 19 percent.
Sales of gasoline cars increased 14 percent for a 59.9 percent market share. Diesel-car registrations rose 24 percent for 29.6 percent share.
German registrations in the first nine months increased 2.5 percent to 2.74 million.
Reuters contributed to this report