Sauber's new car will not be ready until the second pre-season test at Barcelona in March, the team confirmed on Monday.
The Hinwil-based outfit has come off the back of a more encouraging 2015 campaign, where it returned to form following its disastrous point-less season in 2014, but will not have its new car at the first test next month.
A late change to the 2016 testing schedule – brought about by the Australia Grand Prix coming forward as part of a calendar change requested by Bernie Ecclestone in September – has impacted on the team's pre-season plans.
Sauber had originally scheduled its car to be ready for the start of March – when the first test was supposed to start – and despite the shuffling of dates it has elected to stick to that first plan rather than try to fast-track its car build.
That means the new car will not be ready in time for the first test, when the majority of teams are expected to launch their new cars.
Instead, a team spokesman confirmed that Sauber will bring a modified version of its 2015 car – in 2016 colours – to the first Barcelona test, which begins on February 22.
The C35 will roll out at the second test, which begins in Barcelona on March 1.