By Yeliz Candemir

ISTANBUL--Ford Otomotiv Sanayi AS, the Turkish unit of Ford Motor Co. (F) in partnership with Koc Holding AS (KCHOL), said Friday that it has resumed production at its two plants after a brief suspension due to a labor protest hitting its supply lines.

"Since the part supply problem is resolved, manufacturing operations have started in Golcuk and Yenikoy Plants effective from May 21 night shift," Ford Otosan said in a statement to the stock exchange.

The car maker, based in Kocaeli just east of Istanbul, said on Wednesday that it halted production at its two plants due to the parts supply shortage caused by labor actions in some automotive suppliers operating in the Bursa region, where employees at Renault SA's Turkish manufacturer, Oyak Renault, halted work, demanding higher wages.

On Monday, local automaker Tofas Turk Otomobil Fabrikasi AS--manufacturer of Fiat, Citroen, Peugeot, Opel and Vauxhall vehicles--also stopped production as employees downed tools. The work-stoppage protests also spread to auto parts manufacturers in Bursa, an hour south of Istanbul.

After the announcement, Ford Otosan's shares were trading 1.7% higher at 36.60 Turkish lira, compared with a 0.6% drop in the broader BIST-100 Stock Index. The company is 18% publicly owned, with Ford and Koc holding a 41% stake each. Meanwhile, Tofas shares were down 0.5% to trade at TRY18.25.

Write to Yeliz Candemir at yeliz.candemir@wsj.com