Mercedes has traced the blow-up of Lance Stroll's brand-new phase 2 engine in Canada to a spark plug failure, an issue the manufacture has since addressed.
Mercedes introduced its first engine upgrade of the season in Montreal, with the new unit supplied to its works cars as well as to Williams and Racing Point's drivers.
Stroll's engine failed in FP3, igniting concerns in the German camp that the Canadian driver's issue - the cause of which was unknown at the time - could spread to all of Mercedes' phase 2 units.
The weekend unfolded without any further drama however, while investigative work by Mercedes' HPP engine department in Brixworth uncovered the reason for the unexpected breakdown.
"The origin was a spark plug failure that caused a cascade of other problems, resulting in the engine failure," a Mercedes spokesman told Motorsport.com.
"We will have countermeasures in place for this weekend."
Stroll completed his Canadian weekend with a phase 1 engine that powered the Canadian to a top-ten finish. The Racing Point charger should revert to a phase 2 unit for this week's French Grand Prix.
Gallery: The beautiful wives and girlfriends of F1 drivers
Keep up to date with all the F1 news via Facebook and Twitter
Lewis Hamilton, Ferrari (P22/DNF) – 5/10 A total disaster of a weekend for the seven-time…
Honda is shaking up the leadership of its Formula 1 power unit programme as the…
On this day in 2008, Formula 1 saw a spring chicken named Sebastian Vettel become…
Charles Leclerc left the Madring with no regrets about Ferrari's strategic gamble in the Spanish…
Lando Norris lost out on a victory at the Madring thanks to a perfectly miserable…
For Carlos Sainz, the Madring's first Formula 1 weekend was supposed to be a homecoming…