Ford's Marcos Ambrose is back on top of the V8 Supercar championship standings after his team won its appeal after being docked 192 points for a technical breach.

The V8 Supercar National Court of Appeal overturned a stewards' decision to strip Ambrose of his points from winning Sunday's Queensland 300 for his team's breach of technical rules relating to his car's electronic control unit.

It also reduced the original $10,000 fine for Ambrose's Stone Brothers Racing team to $5,000.

The successful appeal returns Ambrose to the top of the V8 Supercar standings.

He now leads the championship by 58 points from Holden's Steven Richards, with Rick Kelly third.

Ambrose's car was found to have an additional wire and a connector attached to its electronic control unit.

Stone Brothers Racing successfully argued the breach did not enhance the car's performance in any way and the penalty was harsh compared to similar breaches.

The appeals board agreed, saying the revised penalty was comparable with previous decisions relating to electronic control unit irregularities.

Earlier this year, Holden team PWR Racing was fined $1,000 and no points for a similar breach involving driver Paul Weel's car.

Ambrose did not attend the hearing at the Confederation of Australian Motorsports headquarters in Melbourne, which took nearly three hours.

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