The car's number also changed from #9 to #4 for this season. The P1/01 claimed its first two wins in the Privateer class, at the Nurburgring and at the Circuit of the Americas. However, the car was excluded from the results of the 24 Hours of Le Mans due to incorrect driver weight ballast. The P1/01 returned in 2016, with radically changed bodywork in order to improve the aerodynamics of the car. The car kept the same number as the previous season, #4. The gearbox was also upgraded to a 7-speed from a 6-speed, at the 24 Hours of Le Mans. The car struggled with reliability issues throughout the season, culminating in fires at the 24 Hours of Le Mans and Nürburgring. The Rebellion Racing team withdrew one of their two cars from the championship after Nürburgring, leaving only two cars in the class. The car managed to claim a win in the 2016 6 Hours of Shanghai after the competing Rebellion R-One had technical issues. The car finished 2nd in the Private LMP1 Teams championship. At the post season rookie test in Bahrain, Former Formula One driver Robert Kubica tested the car. The P1/01 was the only non-hybrid entry in the LMP1 class. Along with this, there was no longer a trophy for private LMP1 teams. As such, it was greatly outclassed by its hybrid competition from Porsche and Toyota. The car had a few upgrades coming into the season, most notably addition of the Nissan Nismo VRX30A Evo from Nissan's flopped GT-R LM program over the previous 2.6-litre twin turbo V6 designed by AER. Aerodynamics were also improved and weight of the car was reduced. At Silverstone, the P1/01 completed 155 laps but was involved in a collision with the #97 Aston Martin at the pit lane entry, causing enough damage to the front to make it unable to finish the race. At the Spa-Francorchamps round, the P1/01 managed to finish in 6th position two laps behind the #9 Toyota TS050 Hybrid and one lap ahead of the LMP2 leader, the #26 G-Drive Racing Oreca run by TDS. At Le Mans, the P1/01 driven by Oliver Webb was forced to retire after debris from the track impacted the front of the car on the opening lap, breaking the steering and damaging the bodywork.