FRANKFURT -- Prosecutors in Stuttgart, Germany, are examining stolen Bosch data to see whether it contains clues about how Volkswagen Group cheated diesel-emissions tests.
"We are reviewing it to see if it is relevant," a spokesman for the Stuttgart prosecutor's office said on Thursday. "Currently, I would question whether we will learn anything new."
The data stems from an old case when a former Bosch employee stole engine software data for the purpose of re-selling it to other automakers and tuning companies.
The employee was convicted of stealing confidential corporate data, and prosecutors are now evaluating whether the data from that case is relevant for a more recent probe of both Volkswagen and Bosch, examining their potential involvement in an emissions cheating scandal.
A Bosch spokesman said the company could not comment on an ongoing investigation.
The Stuttgart prosecutor's office confirmed that the data include software from the 2009 to 2011 period, when Volkswagen used engine manipulation software to cheat emissions tests.
Volkswagen disclosed last September that several of its diesel-powered car models carried software that switched on pollution-control systems only during official tests. Bosch, the world's biggest manufacturer of auto parts, is being drawn into regulatory and legal probes of VW because it supplies the carmaker with engine-control software.
Bosch said in a U.S. court filing earlier this week that it will defend itself against U.S. auto owners' allegations in a civil suit that its employees conspired with the carmaker for a decade to develop the engine-manipulation technology.
Bloomberg contributed to this report