The 29-year-old, who at the moment sits fourth within the Supercars standings for Walkinshaw Andretti United, solely wanted a handful of factors within the first of three races to place the title past Melbourne Efficiency Centre Audi team-mate Luke King.
In his first season within the championship – which returned this yr after a pandemic-induced hiatus in 2020 following its inaugural 2019 season – Mostert has to this point received 5 races and claimed 9 podium finishes, main the factors ever since a double win at Philip Island thrust him into title rivalry.
He spent the primary part of the race at Bathurst in seventh earlier than spending a number of laps locked in battle with John Martin (Wall Racing Honda) forward of him and Jordan Cox (Garry Rogers Motorsport Alfa) behind him.
On lap eight, Mostert slipped down the within of Martin at The Chase, solely to run extensive at Hell Nook and hand sixth to Cox.
Mostert then misplaced extra locations to Martin and King because the race wore on, however ninth was adequate to seal the 2021 crown.
He’ll now sit out the remaining TCR races to concentrate on his Bathurst 1000 commitments with WAU.
Aaron Cameron, in the meantime, took a formidable race win after a relentless battle with GRM Peugeot team-mate Ben Bargwanna.
Chaz Mostert, Walkinshaw Andretti United Holden
Photograph by: Edge Photographics
It was polesitter Bargwanna that originally led the way in which, earlier than Cameron charged previous at The Chase on lap 5.
The pair then ran nose-to-tail throughout the rest of the 17-lap journey, Cameron surviving a hair-raising journey over the exit kerb at McPhillamy with a number of laps to go.
Ultimately they have been separated by simply 0.09s as they crossed the end line side-by-side.
Michael Caruso (GRM Alfa) shadowed the highest two for the primary half of the race, however slipped again to a lonely third, nearly six seconds again, by the end.
Brad Sheils (Tilton Racing Hyundai) completed fourth whereas Cox put in a charging drive to complete fifth forward of James Moffat (GRM Renault).
TCR Australia returns for its second race at Mount Panorama on Friday.