(Corrects paragraph 1 to UK from Detroit)
March 31 (Reuters) - BorgWarner Inc threatened to abandon its purchase of Delphi Technologies Plc on Tuesday after it drew down credit without asking for approval, sending shares in the UK-based automotive supplier tumbling 27%.
BorgWarner in January agreed to buy Delphi in a $3.3 billion deal. (Reporting by Sanjana Shivdas in Bengaluru; Editing by Anil D’Silva)
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