"The realisation that we were coming second in the 2L class meant we were on target to repeat last season's result. Then Jeff had one of the cars cut in front of him at the final turn and he had to slow to a stop," O'Connor said.
After seven seasons of trouble-free performance, the gearbox chose this moment to play up and stuck in first gear, meaning Storey had to limp back, unable to qualify as a finisher.
"Having won the 2L Endurance title last season I wanted to repeat that, but this time with a mate of mine so we would do half the race each. Really there was no real expectation other than go out there and have a bit of fun as part of a team," O'Connor said.
Having been part of the series since its inception he says it will be racing as usual in the New Year.
"The series, right from the start, is very well organised and that was the attraction."
Won by Matakana's Warwick Mortimer in his M3 GTR over 45 laps, the front-running head of the father-son team also set a fastest race lap time of 1m09.206sec.
Tauranga's Graeme Fraser (E36 M3) carried 40 years of experience to second place, ahead of Auckland's Simon Lucas in the Open Class 135i. In 20th position was series rookie and Castrol BMW Race Driver Series Scholarship winner Jordan Baldwin (Howick).
With the 2016 leg of the BMW Race Driver Series wrapped up, the next event returns to Hampton Downs as part of the Tasman Revival double-header weekend being held January 14-15.
The fourth round, a second and final endurance event, will wrap up the season back at Hampton Downs from May 6-7.