Volkswagen Group announced that an additional EUR2.5bn 'special item' charge in connection with 'dieselgate' in the US would affect its third quarter operating profit.
It said the cost was "additional provisions to the agreed buy-back/retrofit programme for the two litre vehicles in North America, due to the more technically complex and time consuming implementation".
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It will publish an interim report for the January-September 2017 period on 27 October.
It has issued a statement to capital markets: "In the third quarter negative special items of [approximately] EUR2.5bn are expected to burden the operating result.
"The reason is an increase in provisions relating to the buyback/retrofit program for two litre TDI vehicles, which is part of the settlements in North America, that is proving to be far more technically complex and time consuming."
Separately, Porsche SE said the negative special items affecting Volkswagen would "weight on profit" but its forecast remained unchanged.
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By GlobalDataSaid Porsche: "Volkswagen AG informed in an ad-hoc announcement of negative special items in the third quarter of approximately EUR2.5bn that will burden its operating results.
"As a consequence of the capital stake of 30.8% Porsche SE holds in Volkswagen AG, a negative effect does occur with regard to the group profit of Porsche SE.
"Taking into account this effect Porsche SE – based on present knowledge – still expects a total group profit for the fiscal year 2017 of between EUR2.1bn and EUR3.1bn.
Porsche said its forecast was still subject "in particular to further findings in connection with the diesel emissions issue" and was based on the assumption the VW Group's full year results would be within the range previously forecasts.
"Due to these constraints, Porsche SE's forecast is inevitably subject to estimation risks," it added.
Porsche will release its third quarter results on 7 November.
