Ford

The three-cylinder turbo petrol of Fiesta and Focus. Early years had cooling system and wet-belt issues; coils and plugs are routine wear.

Mondeo, Kuga and Transit diesel. DPF and EGR suffer in city use, injectors at high mileage - the familiar segment pattern.

The American classic from the F-150. Known for spark plug and COP coil trouble plus cam phasers - misfires are daily bread for its mechanics.