McLaren’s difficult start to the 2017 Formula 1 season continued on Tuesday in Barcelona after being forced to change the Honda power unit on the MCL32 car once again.
McLaren entered 2017 hoping to bounce back from two difficult seasons since switching to Honda power, with the rekindled partnership yet to yield a single podium finish.
Honda looked to make gains by redesigning the layout of its power unit for 2017, only for a number of issues to arise across the course of the first pre-season test in Barcelona last week.
McLaren drivers Fernando Alonso and Stoffel Vandoorne could only complete 208 laps over the four days of running at the Circuit de Barcelona-Catalunya, the second-lowest of any team.
After conducting a filming day between the tests, McLaren returned to the track on Tuesday for the resumption of collective running, only for an electrical issue to hit Vandoorne during the morning, limiting the Belgian to 34 laps in total.
“We detected an electrical issue with the PU in Stoffel’s car. In the interest of maximizing track time, we opted to replace it and investigate the issue further once the PU is out of the car,” a Honda spokesperson confirmed to NBC Sports.
“The PU we are using today is the same spec as the PU run last week at test one.”