New Delhi, July 25 -- Just a month after Sona Comstar chairperson Sunjay Kapur died in London, a family dispute has erupted over the inheritance of one of India's leading auto component makers.

Citing a 2015 will, Sunjay's mother Rani Kapur has claimed to be the sole beneficiary of the estate of her late husband and company founder Surinder Kapur. In a letter to the Sona Comstar board, she further claimed that she was coerced into signing certain documents without revealing their content by individuals she did not name.

In her 24 July letter, Rani Kapur called for deferring the company's annual general meeting (AGM) scheduled for the next day. She expressed concern that certain individuals would be appointed to the Sona Comstar board as...