Nissan Motor Co's Taiwan affiliate will check radiation levels on all car parts imported from Japan, while its cars will sport stickers on their windscreens in an effort to reassure customers of their safety.

Yulon Nissan Motor Co said in a statement that beginning April 1 parts will be checked for radiation in three stages: before shipment to Taiwan, at the port of arrival and after assembly.

All finished cars will carry stickers on the lower right corner of their windscreens stating "radiation check OK" if they have levels lower than the 0.2 millisieverts permitted, the statement said.

Taiwan's authorities have stepped up checks on Japanese products since the earthquake and tsunami caused a crisis at a nuclear power plant in the country, banning food imports from five prefectures around the stricken plant.

Taiwanese fishing boats have been told to stay out of Japanese waters, all imported goods are being checked for radiation and travellers arriving from Japan are being scanned. The nuclear energy authority checks radiation levels island-wide every day.

One of the capital Taipei's top Japanese restaurants is even offering diners the use of a radiation monitor to check themselves and their food.

Taiwan has three operating nuclear power plants and a fourth under construction, but the island, like Japan, is prone to earthquakes and sits on fault lines, stirring debate over the future of the energy source.

Photographs accompanying the Yulon Nissan statement showed workers in radiation suits checking with a handheld detector a box labelled as having come from hose-maker Nichirin's factory in Himeji in central Japan, as well as a worker in regular overalls and a facemask checking a Nissan vehicle.

It said the checks will lengthen the time needed to assemble each vehicle by about four to five minutes, but the company will absorb the extra costs.

Yulon Nissan has around a 12 percent share of the Taiwan auto market. Makers expect total car sales in Taiwan in 2011 to be about 350,000 units.