Hamilton to run improved MGU-H in Spain

Mercedes has confirmed Lewis Hamilton will run an improved design of MGU-H and turbo at the Spanish Grand Prix as it looks to solve recent reliability problems.

Hamilton suffered identical MGU-H failures in qualifying for both China and Russia, hampering his chances of winning the last two races and seeing him lose ground to Nico Rosberg in the championship fight. The MGU-H is an integral part of the power unit that recovers energy from the turbo and controls its speed to ensure optimum boost pressure at all times.

After examining the failure Mercedes has redesigned the components in the hope of overcoming those issues, but because the upgrade is focused on reliability over performance it has not cost the manufacturer any engine tokens. The new parts were fitted ahead of first practice after the team said it made a “superhuman effort” to get the components ready for the Spanish Grand Prix.

It moves Hamilton onto his fourth MGU-H and fourth turbo of the season, meaning he has just one left of each component before incurring grid penalties.

This weekend will also see Nico Rosberg running a new internal combustion engine (ICE) and MGU-K, but unlike Hamilton retains his own MGU-H component which has run reliably this season.