The figures represent the first increase in 15 months.
Car production increased by 3.3% last month, the first rise in over a year, new figures show.
A total of 92,158 cars were built in August, the Society of Motor Manufacturers and Traders (SMMT) said.
It was the first increase in 15 months, mainly because several plants brought forward planned summer shutdowns to April to guard against the disruption of the then March 29 Brexit date, the SMMT added.
Just over 2,900 more cars were produced in August than in the same month last year, but this was not enough to compensate for April’s 56,999-unit loss, resulting in a 17% deficit in the year-to-date.
A total of 866,918 cars were produced in the first eight months of the year – the first time output has dipped below one million units in the period since 2014.
Mike Hawes, SMMT chief executive, said: “While growth is always welcome, today’s figures mask the underlying downward trend and strengthening global headwinds facing the sector, including international trade tensions, massive technological upheaval and, in the UK, political and economic uncertainty.”
He continued: “Softening of global demand is compounding the challenge to UK manufacturers for whom a ‘no-deal’ Brexit would be a hammer blow.
“The mere threat of no-deal has undermined investment and the potential imposition of tariffs, border delays and additional administrative burdens would damage competitiveness.
“We now need Parliament and Government to redouble efforts to get a deal that maintains free and frictionless trade.
“Given the ongoing challenges and costs being incurred, there is not a moment to lose.”