Car production dipped more than 12% in April compared to the same period last year.
There was a fall of 4.7% to 190,131 in the engines manufactured and the commercial vehicles figure was almost 20% down to 8,633, Society of Motor Manufacturers and Traders (SMMT) figures revealed.
The total number of vehicles produced in April was 86,306, down by 12.2% on last year.
But the SMMT said the motor industry will stabilise soon as the number of cars built since the start of the year reaches 443,536.
Paul Everitt, chief executive of SMMT said: "April's vehicle and engine production figures reflect the global production challenges resulting from the Japanese earthquake. Output was down across the car, commercial vehicle and engine sectors as parts shortages interrupted regular manufacturing schedules.
"All manufacturers are working hard to overcome supply shortages and we expect any downturn to be short lived. The outlook for the UK motor industry is extremely good and this should generate new opportunities for vehicle manufacturers and suppliers."
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