 At the second race of the season, the 2018 12 Hours of Sebring, both cars fell back against the competition during the qualifying session, with the #77 coming in 7th, 8 tenths behind the leading #90 Cadillac DPi-V.R of Spirit of Daytona Racing, while the #55 came in 9th, half a tenth behind the sister car.For the first 3 hours of the race, the Mazdas ran a smooth and event-free race, with both cars on the lead lap, running sixth and seventh, with the #55 leading the #77, and being within 30 seconds of the leading car, the #31 Cadillac DPi-V.R.Owing to the cars being able to consume lesser fuel than its competition, resulting in fewer pit stops for refuelling, the cars were able to take the lead periodically, by the fourth hour, although it was by this time that issues surfaced, with the #77 having issues with its rear brakes, with the time spent on rectifying the issue costing the car 24 minutes of track time, falling over 5 laps behind the leaders.