Turnover in the UK's car industry rose to its highest level in history in 2015, according to the Society of Motor Manufacturers and Traders (SMMT).
Turnover grew 7.3% last year to £71.6 billion, with employment jumping 18,000 to 814,000.
Vehicle production rose 5% to 1.7 million cars in 2015, and the industry is currently on course to beat that number in 2016, with production already up 10% on this time last year. In the UK, 2.6 million new cars and 420,000 commercial vans were sold in 2015.
However, the SMMT warned that record figures for the industry may have come to an end following the vote to leave the European Union.
Mike Hawes, the SMMT's chief executive, said the UK's car industry has "gone from strength to strength", but attributed much of that to access to the single market. With uncertainty surrounding the UK's future in that single market, he said "the industry now faces new challenges. Uncertainty, economic instability and an undoubted impact in terms of cost, influence and ease of business".
Speaking at an industry summit, Mr Hawes said: "We need full and unrestricted access to the single market now and in the future, 80% of what we produce is exported and the only way to succeed is through unrestricted and reciprocal access to the EU and global markets."