BMW Sauber's answer to the controversial double diffuser operated by rival teams Brawn GP, Toyota and Williams will not make its maiden run at this weekend's Spanish Grand Prix, despite the unveiling of the team's latest aerodynamic package.
Speaking to Autosport, BMW boss Mario Theissan also admitted that the team's dismal start to their 2009 campaign was likely to continue.
In the opening four races of the season, the team—deservedly confident following a strong finish to 2008—has scored only one point.
He said: ""We moved our season targets that we set in winter aside.
"We cannot win races at the moment, therefore we shifted our targets. But we won't accept the current situation. We will speed up, we will have a look at where we will end up, but we certainly will not give up on this season."
Last month, the FIA court of appeal ruled in favour of Brawn, Toyota and Williams, declaring their cars compliant with 'applicable regulations.' The legal challenge, mounted by BMW alongside rivals Ferrari, Renault, and Red Bull, was centred on the shape and dimensions of the unit, which collects and distributes airflow beneath the car.
The resulting increase in downforce—and reduction in drag—allows for a noticeable increase in performance.
An interim re-design of the diffuser will be fitted to the BMW cars as a part of the team's Barcelona package of upgrades—their first upgrade this season—with a final version to follow in Monaco.