The Japanese carmaker announced in October it would invest in building two new models at its plant in Sunderland, England | Scott Olson/Getty Images Nissan’s UK deal escapes Brussels probe EU rules prevent governments from subsidizing favored companies or sectors.

The European Commission said today it will not open a state-aid probe into the assurances London gave Nissan that led the automaker to announce it would build two new models in England despite the U.K.'s impending split from the European Union.

"We have been asking a number of questions and we are not concerned," Margrethe Vestager, the European commissioner for competition, told reporters today at a press conference in Ireland.

Officials wanted to check whether the controversial guarantees breached EU rules preventing governments from subsidizing favored companies or sectors. A full-blown probe could have inflamed tensions ahead of negotiations over the U.K.’s exit from the EU.

Under EU law, assurance and guarantees given to companies can amount to illegal state aid even if no money changes hands.

The Japanese carmaker announced in October it would invest in building two new models at its plant in Sunderland, in northeast England, following assurances from the U.K. government over Brexit.