The head of Nissan has warned the car maker would "reconsider" its future in the UK if it left the European Union.
Carlos Ghosn, chief executive of the Japanese motoring company, said that the company would re-evaluate its position if the UK was to leave the EU.
Speaking at the launch of Nissan's new Qashqai model, he said: "If anything has to change we would need to reconsider our strategy and our investments for the future."
But he added that he considered such an exit unlikely.
The new Qashqai will be built at Nissan's Sunderland site in the UK, which employs 6,500 workers.
British Prime Minister David Cameron has promised a vote on EU membership in 2017 if the Conservatives win the next general election in 2015.