SEOUL (AFP) - The most productive car factory in the world fell quiet on Friday (Feb 7) as South Korea's Hyundai suspended operations at its giant Ulsan complex, hamstrung by a lack of parts, with the coronavirus outbreak crippling China's industrial output.

The five-plant network can make 1.4 million vehicles annually, in a coastal location facilitating importing components and exporting cars globally.

But supply lines are crucial in an ever more interconnected worldwide economy, and the coronavirus outbreak in China has seen Beijing order factories closed in several areas as it seeks to contain the epidemic.

As a result, Hyundai - which with its affiliate Kia ranks as the world's fifth-largest auto manufacturer - has run out of the wiring harnesses that connect vehicles' complex electronics.

It is having to suspend production at its factories across South Korea, putting 25,000 workers on forced leave and partial wages, healthy victims of the disease outbreak across the Yellow Sea.

"It's a shame that I can't come to work and have to accept a pay cut," said an Ulsan production line staffer surnamed Park. "It's a very uncomfortable feeling."

The closures could be the first example of a phenomenon that rolls out around the world, analysts say.

The impact on Hyundai will be eye-watering, with analysts estimating a five-day South Korean shutdown to cost the firm at least six hundred billion won (S$700 million).

Hyundai is not the only corporate casualty: Kia will suspend three plants for a day on Monday, the South Korean unit of French automaker Renault is considering stopping its factory in Busan next week, and Fiat Chrysler CEO Mike Manley told the Financial Times his firm could be forced to halt one of its European factories.

Analysts warn of broader troubles if Beijing extends the Chinese New Year holiday further as the coronavirus - which according to official figures has infected more than 31,000 people in China and killed 636 - continues to spread.

"The biggest problem is that we don't know how the outbreak in China will unfold," said Korea's Inha University economics professor Cheong In-kyo.

"South Korean companies rely heavily on China for parts and components. The problem is even if just one part is missing, you can't do anything."

The disruption was only just beginning, he added, and warned it would spread beyond the auto sector.

"There is not a single category that is not manufactured in China."

'EVERYONE IS IMPACTED'

China is the world's biggest exporter of goods, with the United States by far its largest trading partner.

Exports to the US from China and Hong Kong combined - many goods are shipped via the financial hub - totalled more than US$450 billion (S$625 billion) last year, followed by Japan with more than US$150 billion. South Korea and Vietnam also both imported goods worth more than US$100 billion from the pair.

"China has become an integral part of the global manufacturing supply chain, accounting for about one-fifth of global manufacturing output," said Moody's Analytics chief economist Mark Zandi.

Its neighbours will be hit by supply chain effects first, he said, naming Taiwan and Vietnam, followed by Malaysia and Korea.

The effects in the US would be delayed by the length of the supply lines, said Ms Kristin Dziczek of the Centre for Automotive Research in Ann Arbor, Michigan, but there would be secondary impacts on parts from other overseas markets built with Chinese items.

Automakers and suppliers were "evaluating and planning how to navigate the disruptions", she said.

"But there is no capacity the size of China sitting idle waiting to fill in the gaps and it's difficult to move quickly in this environment when everyone is impacted."

'SO DEPENDENT'

The global car industry was plunged into turmoil when a single Renesas Electronics factory in Japan - making a vital and widely used microcontroller - was put out of action by the 2011 Fukushima earthquake.

Supply lines have since become much more diversified, analysts say.

"Car manufacturers have a system of multiple sourcing because the risk would be too big to have only one supplier in one place for a particular part," said Germany's Centre Automotive Research director Ferdinand Dudenhoeffer.

It was standard for parts to be provided by "at least two different suppliers", he said, adding that as part providers tended to be in the same region as the vehicle assembly line, "the car industry in Europe or America is much less exposed to a Chinese risk than Asian countries like Korea or India".

But sourcing wiring harnesses from three different companies failed to protect Hyundai's South Korean plants.

"We should have more diversified suppliers," said production worker Park.

"It's a shame that there is nothing we can do at this point because we are so reliant on one country."