BC Ferries says one of the newest and most expensive ships in its fleet will be out of commission for at least another day.

The Coastal Renaissance was taken out of service for mechanical problems Tuesday, and still isn't fixed.

A broken propeller on the Coastal Renaissance forced the cancellation of four sailings from Horseshoe Bay to Nanaimo Tuesday.

Older ships, including the Queen of Cowichan, were brought in to make up the lost runs but an additional two sailings - the 11:10 a.m. and 1:20 p.m. from Departure Bay - were cancelled Wednesday because of the repair work.

BC Ferries spokesperson Deborah Marshall says engineers should finish maintenance this afternoon and will need to conduct testing before the ship is back in service.

Originally BC Ferries said the ship would be back in use Wednesday morning, but now that time has been pushed back until Thursday morning.

The $170 million Coastal Renaissance made its first voyage only four months ago. It is the first of three Coastal Class Ferries - or Super "C's" - built in Flensburg, Germany specially for BC Ferries. The new ships will replace the aging V class ferries, and were designed primarily to service the busiest ferry routes connecting the Lower Mainland to Vancouver Island.

It is the largest double-ender ferry in the world.

This isn't the first time the new ferry has been brought in for maintenance. In May, the ship ran into the walkway while docking at Departure Bay - scratching the vessel and closing the walkway for repairs.