Continuity mistake: In scenes showing how Letty survived the explosion it shows her crawling out of the car then getting blown down the hill, but in Fast and Furious she is still in the car when Phoenix shoots it, causing the explosion, so she couldn't have been blown down the hill.
Continuity mistake: When Riley and Gisele are about to talk with the blonde guy who makes the gadget for Shaw, Riley moves her hands between shots.
Continuity mistake: When Roman is fighting the guy on the bonnet of Shaw's Land Rover, Tej signals him to get back on his Mercedes jeep. When Roman does this, the jeeps are pressed up against one another. Then Tej rams Shaw's Land Rover into the jetwash of the plane. Right before he does this, suddenly a massive gap has appeared between the cars.
Continuity mistake: The first police car Shaw flips changes from a hatchback to a saloon when Hobbs rams it.
Continuity mistake: After the race between Dom and Letty, they pull over and start to talk. The lights from Dom's car go from on to off and then on again.
Continuity mistake: When we first see Brian with his wife and baby he hands him the toy car. The baby holds a stuffed monkey in his right hand but a shot later he is grabbing the car.
Continuity mistake: Hobbs' jeep drives past the blockade on the bridge as seen in the wide shot. In the close-up it's meters behind and it drives past it again.
Continuity mistake: When the movie ends and they're saying grace, Jack the baby turns 180° around between shots.
Continuity mistake: When the movie ends, Brian shows his baby the new garage. Toretto shows up and says "a charger" and Mia turns her head towards him. When the angle changes she is repeating the movement.
Continuity mistake: During the highway-viaduct chase, Shawn tells Letty to check the cable. Then a blue car rampages through cars, while on the other lane some people run away surrounded by cars. A shot later people and cars are gone.
Continuity mistake: After the London tube scenes, Gisele throws her mobile phone on a table. Its position changes between shots.
Continuity mistake: After the London car auction scene Toretto is watching his bullet when Brian shows up. He then turns his hand sideways, but a shot later from a different angle his hand is still in the initial position.
Continuity mistake: At the car auction in London, a woman in pink walking with a black man in a suit walks behind Hobbs twice.
Continuity mistake: During the car auction in London, a woman walks behind two Arabs with red and white ghutrahs. A shot later she has vanished.
Continuity mistake: When Luke gathers the whole team he throws Owen's photo on the table. In the close-up it lies next to a colour brochure, but in the wide angle it is a totally different type of paper.
Continuity mistake: Luke finds Toretto who says "I wasn't hiding" and raises his right arm to fix an engine. A shot later he is further away from the engine plus his arm is lowered.
Continuity mistake: Dominic is in bed with Elena, his right arm bent behind his head. A shot later his arm is already down by his side.
Continuity mistake: When the movie begins, the jeep crosses the blockade. When the angle changes the jeep is several meters behind crossing it again.
Continuity mistake: At the hospital Brian walks to kiss Mia, whose hair covers her left cheek. When the angle changes her cheek is spotless.
Continuity mistake: When Dominic and Brian arrive at the Spanish clinic, the yard is empty and two nurses are walking in front of them. Half a second later the nurses are gone and the yard is packed with people.
Suggested correction: That's exactly the problem that Shaw is referring to, a member of his team installed the incorrect plug which caused a problem, i.e. a Spark Plug and not a Glow Plug (a simple thing, causing the problem), along with the 'good' being simple minded and causing the rest of Shaw's team a problem.
The glow plug isn't what causes combustion in a diesel like how a sparkplug does for gas. The wiring harness for a spark plug vs a glow plug is completely different and they aren't interchangeable. You can't just accidentally put a spark plug in a diesel, it doesn't work like that.