Oliver Solberg had major problems during the day with the car misfiring and a blocked window.
But he ended the day in fifth place when several cars disappeared from the results list.
- I drove as fast as I could and tried in every way to fix the problem, says Solberg to wrc.com.
- Oliver Solberg hasn't really had a fair chance in the rally with all the problems.
If he can finish in fifth place, it's a very nice point in the account, says expert Jonas Kruse.
Yesterday's leader Elfyn Evans was forced to break the rally for the day after smashing the safety cage in a hard spin that ended in an embankment.
Gus Greensmith with the Swedish map reader Jonas Andersson crashed heavily on the third leg of the day.
The Brit drifted down the edge of the ditch at high speed and flipped around.
They survived the nasty incident shaken.
Takamoto Katsuta was also forced to give up after running off the road when he was fifth.
Before the final stage – four short stages – Rovanperä is a full 29 seconds ahead of stablemate Sébastien Ogier.
Tänak is 46 seconds behind Rovanperä.
The Estonian received a total of 15 seconds time penalty because the car gave too much hybrid boost.
A mechanic had made an incorrect adjustment on the car.
Should the Finn take eight more points than Tänak, Rovanperä is clear world champion.
- The pendulum has swung again.
Rovanperä impresses greatly and most things point towards Kalle winning the WC title already tomorrow, concludes Kruse.
SVT broadcasts from the closing stage at 01.00 in SVT2/SVT Play and Powerstage at 04.00 in SVT1/SVT Play.