Car production fell by 1.4% in November.
According to the Society of Motor Manufacturers and Traders, the number of cars made in November fell to 106,243.
The trade body has said that the situation could worsen depending on the Brexit deal.
In the 11 months to November, UK car production was down by 31% compared to the same period a year earlier.
Mike Hawes, SMMT chief executive, said: “Yet another decline for UK car production is of course concerning, but not nearly as concerning as the New Year nightmare facing the automotive industry if we do not get a Brexit deal that works for the sector.
“With just nine days to go, the threat of no deal is palpable and the sector, now also reeling from the latest coronavirus resurgence, Tier 4 showroom lockdowns and disruption at critical UK ports, needs more than ever the tariff-free trading arrangements on which our competitiveness is founded.
“It is finally make or break time, as being forced to trade on WTO terms would be a hammer blow for many automotive businesses, workers and their families, so we must get a deal, and one that avoids the devastation of punitive tariffs for all automotive products, from day one.
“For the long-term survival of UK Automotive, there is quite simply no other option,” he added.