Will Davison required running repairs prior to Sunday’s two sprints at Sandown.
Davison ended Sunday on the podium with a runner-up finish in Race 26.
The Shell V-Power Racing Team driver’s day began with a scare in qualifying.
An electrical fire broke out in the #17 Shell V-Power Racing Team Mustang in Race 25 qualifying.
Davison brought the smoking car back to pit lane, and he quickly alighted from the car.
A battery fire was prompted by an electrical short in a data input.
The 39-year-old watched on as rivals bumped him down to 11th in the order.
Davison quickly returned to the seat of his car and fired in a new Sandown practice/qualifying lap record.
He converted the result to second, having been penalised in the earlier race.
Speaking after the finale, Davison revealed he visited Supercars medical delegate Dr Carl Le.
"I had a weird morning, that's for sure,” he said.
"It was a bit of a shock.
"The priority was to try and get the car back and not cause a red flag.
“It was getting pretty hard to breathe in the last minute or so. It was getting quite bad.
"I'd rather not breathe than cause a red flag.
"I was with Dr Carl for a bit on the oxygen for a bit."
Davison's Race 25 charge was undone by a pit lane infringement, but he rebounded to second in Race 26.
Davison closed to within 0.5s of eventual winner Shane van Gisbergen by the chequered flag.
It came after Davison was rear-ended by teammate Anton De Pasquale shortly after van Gisbergen got by on lap 2.
Davison was otherwise pleased with the weekend, and has jumped De Pasquale in the standings.
"It was pretty wild racing there," he said of the early stages of Race 26.
"He got a few runs on me, we were side-drafting up the back straight.
"Unfortunately for Anton, he's out of the race.
"Great weekend, speed was good. We were coming at the end there.
"Thanks to the team, sorry I didn't get the win then, but tried my best."
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