Volkswagen said third-quarter operating profit at its core brand plunged more than half, adding weight to management calls for cutbacks at VW's biggest division.
Operating profit at the VW namesake brand dropped to 363 million euros ($396 million) from 801 million a year earlier, VW (vlkay) said on Thursday, or just 1.5% of sales.
The figure was well below a consensus forecast of 462 million euros in a Reuters poll of analysts.
Europe's largest automaker needs to make savings at high-cost operations in Germany to help fund a shift to electric cars and self-driving vehicles while facing billions of euros in costs from its diesel emissions test-cheating scandal.
"The results reinforce the need for cost cuts at the VW brand," said Commerzbank analyst Sascha Gommel, who has a "hold" recommendation on the stock.
In the seasonally slow July-to-September period, business at the VW brand was marred by suppliers halting parts deliveries to protest against the cancelation of a contract by VW, curbing output of the top-selling Golf and Passat models at the Wolfsburg and Emden plants by about 20,000 units.
Analysts estimated the supplier dispute shaved a three-digit million-euro amount off the brand's quarterly profit and said the carmaker also offered incentives to offset the impact of its emissions scandal on sales.
Year-to-date sales of the VW brand swung back to growth on a 6.7% gain in September and posted the strongest growth in two-and-a-half years last month at group level, helped by strong demand in China and Europe.
The VW group raised its guidance for profit and revenue this year after posting higher-than-expected quarterly earnings of 3.3 billion euros, adjusted for special items, reflecting strong gains at premium brand Porsche.
The group said it expected revenue to match last year's 213 billion euros after predicting in July that revenue would fall by as much as 5% this year.
The group's operating margin may come in at the upper end of VW's 5-6% target range before special items, the carmaker said. It previously forecast the profitability benchmark to fall within that corridor.
The shares were trading up 0.1% at 126 euros as of 08:04 GMT.
"Despite major challenges and the negative impact of the diesel issue, the Volkswagen Group remains on a solid financial footing," finance chief Frank Witter said.