Tänak, who broke his career duck with victory in Italy in June, drove his Ford Fiesta to a 16.4sec victory over Andreas Mikkelsen at the asphalt ADAC Rallye Deutschland.
Ogier finished third to move 17 points clear in the standings after Thierry Neuville failed to score. The Belgian could only finish 44th after breaking his Hyundai i20’s suspension on Saturday morning.
Estonian Tänak took the lead on Friday afternoon and eased through today’s short finale on dry country roads in Saarland. He lies 33 points behind Ogier and has not ruled out a title challenge with three rounds remaining.
Several mistakes on Saturday ended Mikkelsen’s hopes. The Norwegian kept the pressure on, but his realistic goal was to keep Ogier behind him and he ended 14.0sec clear of the Frenchman in his Citroën C3.
Once Neuville dropped out of contention, Ogier was happy to settle for third and big points. He offered no challenge to Mikkelsen today, but claimed two extra bonus points in the final Power Stage to further boost his hopes of a fifth straight title.
Juho Hänninen followed up his first WRC podium at the previous round in Finland with fourth in a Toyota Yaris. He conceded position to Elfyn Evans last night after breaking a damper, but regained it this morning.
Evans rued his choice of soft compound tyres for today’s final four speed tests. He was also overhauled by Ireland’s Craig Breen, who snatched fifth in the final stage despite landing from a jump with such force that it cracked his C3’s windscreen. The gap was 1.9sec.
Jari-Matti Latvala finished almost two minutes behind Evans in seventh in his Yaris. Hayden Paddon was eighth ahead of local hero Armin Kremer, driving a 2017-specification Fiesta for the first time. WRC 2 winner Eric Camilli completed the leaderboard.
Following a six-week break the championship moves to Spain for the only mixed-surface fixture of the season. RallyRACC Catalunya - Rally de España is based in Salou on 5 - 8 October.