The logos of the Italian car manufacturer, a sister brand of Ferrari, prominently feature on the engine cover.
The car itself adopts a new aerodynamic philosophy, which technical director Joerg Zander hopes can deliver a step forward in performance.
“The 2018 challenger is the result of the hard work that everyone in the factory has put in over the last few months,” he said.
“Speaking about the C37, the car philosophy is much different to that of the C36. The aerodynamic concept has changed significantly and the C37 has several new features in comparison to its predecessor.
“We are positive that the new concept offers us more opportunities and will help us to make improvements during the course of the season.”
The new Sauber is fitted with Ferrari’s current power unit, with the team having run a year-old version throughout 2017.
Speaking earlier this year, driver Marcus Ericsson reckoned there was no reason why the team could not challenge strongly in the midfield thanks to progress on the engine and aero front.
“The goal is simply to get into the group of teams that are in the midfield – but it is clear that there will be a very open battle grand prix after grand prix.
“I want to be in the best shape possible to find the satisfaction that was missing in 2017.”
Great to have Alfa Romeo back in Formula 1 and it’s refreshing to see a new look for Sauber. Best of luck to Charles Leclerc too, as the Formula 2 champion steps up into his first season of Grand Prix racing.