Clarkson's strong views have pitched him up against politicians, national governments, environmental groups, car companies and communities across Britain over the years. Facebook has an "I Hate Jeremy Clarkson" page.
A BBC statement on Thursday said the corporation had spoken to Clarkson and made "absolutely clear" the standards expected.
"We have left him in no doubt about how seriously we view this," said the statement.
A BBC spokesman said on Saturday the corporation had nothing to add beyond this statement. The BBC declined to say how much Clarkson makes or how much Top Gear earns.