A four-time champion, he holds the all-time record for the most drivers' championship titles won in the GT500 class of Super GT.

After spending two seasons under the Lexus banner, Quintarelli moved to the Nissan camp, securing multiple victories.

Quintarelli moved from sixth place to the lead in the opening lap, although tyre issues cost him track position later.

The number 23 Nismo car still secured one win at Suzuka and a third place at Autopolis, but the Quintarelli-Matsuda pairing had to settle for ninth in points.

Quintarelli speaks Japanese fluently and serves as a TV color commentator for the Super Formula series.

Together with fellow Super GT regular Andrea Caldarelli, he led a fundraising campaign in favour of the populations impacted by the 2016–2017 Central Italy earthquakes.

His cross-border charity efforts, together with his sporting results, earned him the title of Officer of the Order of the Star of Italy.