IT systems at Jaguar Land Rover are partly back on line as part of a "phased restart" following a cyberattack, but production will remain paused until at least October 1, the Britain-based automaker said on Thursday.
The attack, the latest to target luxury brands and retailers, has severely disrupted sales and production at the firm owned by India's Tata Motors.
The carmaker announced that it had been targeted on September 2, forcing it to suspend production at its UK factories.
But parts of its IT systems were now back as part of a "controlled, phased restart of our operations", it said in a statement.
"Today we have informed colleagues, suppliers and retail partners that sections of our digital estate are now up and running," it said.
"The foundational work of our recovery programme is firmly under way," it added.
Unions have warned that firms in the supply chain could collapse due to the disruption.
JLR said the partial systems restart had allowed it to begin work to clear the backlog of payments to suppliers.
Its global parts logistics centre, which supplies spare parts that are used to service its customers’ vehicles, was also returning to full operations, it said.
It had also been able to resume processing wholesales of its vehicles, meaning it could sell and register vehicles again, it added.
The cyberattack is the latest setback for JLR, which reported a sharp reduction in sales after it halted exports of its cars to the United States in April in response to President Donald Trump's tariffs.
A trade agreement between London and Washington reduced the tariff on UK car exports to 10 percent from 27.5 percent, on a limit of 100,000 vehicles annually.
Cyber gangs have increasingly targeted luxury brands and retailers.
British retailer Marks and Spencer recently suffered a cyberattack that crippled its online services for weeks and cost the group £300 million ($402 million).
The luxury department store Harrods and the Co-op food chain have also been hit in recent months.