Toyota South Africa Motors on Wednesday shut down production after workers at a company-owned parts supplier went on strike, a spokesman said.

"Due to the fact that we can't get parts from Toyota Boshoku our production stopped this morning," said Toyota SA spokesman Leo Kok.

Workers at Toyota Boshoku have demanded a one-off bonus of 1,500 rand ($172, 132 euro).

The Toyota Group owns shares in Toyota Boshoku, which supplies the group's South African plant with components like car seats and door linings.

The firm, which produces 120,000 vehicles a year, is the seventh biggest distributor of Toyota vehicles outside Japan, according to official figures.

Strikes have rocked Africa's largest economy, with tens of thousands of workers downing tools starting in the platinum mining sector, then spreading to other mining industries, transport and manufacturing. Demands have focused on wage hikes.