The company said in a statement: "Honda of the UK Manufacturing Ltd has been assessing how best to prepare for any disruption caused by logistics and border issues following the UK leaving the EU on 29 March 2019.
"To ensure Honda is well paced to adjust to all possible outcomes, we are planing six non-production days in April 2019.
"This is to facilitate production recovery activity following any delays at borders on parts.
"These contingency provisions have been put in place to best mitigate the risk of disruption to production operations at the Swindon factory."
Three years ago the Japanese just-in-time car manufacturer invested £200m in its Swindon site, to make it a global hub for the next generation of its popular compact Honda Civic cars.
The company's plans to put production on hold emerged on Thursday, as its home country's prime minister Shinzo Abe met UK counterpart Theresa May.