At the Tour de Corse, Audi debuted the Quattro A2, which was 70 kg (155 lb) lighter and had an engine producing 30 more horsepower. Mouton's rally ended when her engine caught on fire. On the first stage in Greece, she rolled her car on a hairpin turn 18 km (11 mi) from the start. Rally New Zealand was for Mouton a repetition of the previous year; she took the lead on the seventh stage and held on to it until her A2's engine failed, with only six of the 33 stages to go. The three retirements in a row dropped Mouton to fifth place in the championship. She then finished third behind Mikkola and Blomqvist at the Rally Argentina, but this would remain her last podium finish of the season. At the 1000 Lakes in Finland, Mouton finished the first day in seventh place after setting two top-five stage times. Her car later caught on fire, but she was able to continue in the event by following Mikkola's advice and driving into a lake. With a string of top-ten times, she eventually finished 16th. In the Rallye Sanremo, the tarmac stages were dominated by the Lancia 037 and Mouton finished seventh after suffering from fuel injection problems. In the season-ending RAC Rally, she started well and held second place after the first twelve stages. An Audi mechanic later accidentally refilled Mouton's fuel tank with pure water which resulted in time-consuming repairs. She eventually retired after crashing out, and placed fifth overall in the drivers' championship. Although Mikkola beat Lancia's Röhrl and Alén to the drivers' title, Audi had lost the manufacturers' title to Lancia after the latter's triple win in Sanremo.