Car production in Thailand fell 11% in April from a year earlier to 104,667 units, the Federation of Thai Industries (FTI) said on Thursday.
The figure compared with March's 23.1% year-on-year drop. There were long holidays in April, the FTI said.
In the January-April period, car production contracted 17% from a year earlier to 518,790 units, it said.
The FTI has has attributed the slump in vehicle output to weaker demand for pickup trucks as financial institutions tighten lending standards in the face of rising bad loans.
Domestic car sales dropped 21.49% in April from a year earlier, after a drop of 29.8% year-on-year in the previous month, the federation said.
Thailand is Southeast Asia's biggest autos production centre and an export base for some of the world's top carmakers, including Toyota and Honda, with pickup trucks among the key vehicles manufactured.
The federation has predicted car production at 1.9 million vehicles this year after 1.84 million made in 2023.