Volkswagen apparently isn't the only automaker that's experiencing issues with exceeding emission limits, as a new report from German magazine Auto Bild claims that some of BMW's diesel cars are exceeding Europe's air pollution limits.

The German automaker's X3 sport utility vehicle is noted in the report as exceeding EU anti-pollution limits by up to 11 times in road tests, according to Bloomberg. The company responded to the report, claiming that it doesn't cheat on emission tests.

"The BMW group does not manipulate or rig any emissions tests," BMW said in a statement. "We observe the legal requirements in each country."

The report's release resulted in BMW's stock dropping by as much as 9.7 percent, the biggest plummet that the company experienced in over four years. Shares fell to an intraday low of 72.05 euros in late morning trade.

The road tests were done by the International Council on Clean Transportation (ICCT), which Auto Bild noted as the same organization that tipped off U.S. regulators about a gap between VW and Audi diesel-powered cars in road tests.

"All these data show that the problem is not specific to VW," said Peter Mock from ICCT, NDTVAuto.com reported.

BMW also pointed towards two other ICCT studies showing that the X5 SUV and 13 other BMW vehicles tested comply with legal requirements on nitrogen oxide emissions, Bloomberg reported.

"There's no suggestion BMW has done anything illegal," Bankhaus Metzler analyst Juergen Pieper said. "However, there are concerns for the long-term damage on the business with diesel cars."

Auto Bild's report follows on the heels of Martin Winterkorn's resignation as VW CEO in order to take responsibility for the company's current emission scandal involving diesel-powered cars. The U.S. Justice Department and the Environmental Protection Agency have started their own investigations into the matter.

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