der Fahrer
driver
A person who operates a vehicle such as a car, bus, truck, or train.
Der Fahrer des Wagens hat die Vorfahrt missachtet.
The driver of the car failed to yield the right of way.

driver
Loading your saved state.
driver
A person who operates a vehicle such as a car, bus, truck, or train.
Der Fahrer des Wagens hat die Vorfahrt missachtet.
The driver of the car failed to yield the right of way.

'Der Fahrer' (the driver/rider) is derived from the verb 'fahren' (to drive/ride) by adding the ending '-er'. This pattern is used very frequently in German to refer to a person who performs a particular activity.
Wer fährt dieses Auto? Ich möchte mit dem Fahrer sprechen.
Who is driving this car? I would like to speak to the driver.
The word 'Fahrer' is often the second part of compound nouns, used to specify the type of driver or rider. Typical examples are 'LKW-Fahrer' (truck driver), 'Busfahrer' (bus driver), 'Taxifahrer' (taxi driver), or 'Radfahrer' (cyclist).
Der LKW-Fahrer musste eine lange Pause machen.
The truck driver had to take a long break.
Whether 'Fahrer' means a person at the wheel of a car or on a bicycle is always clear from the context. The vehicle mentioned (e.g., car, bus, motorcycle) determines the exact meaning.
Der Fahrer des Motorrads trug einen Helm.
The rider of the motorcycle was wearing a helmet.
driver
'der Fahrer' and 'der Autofahrer' can both mean a person who drives a car. However, 'der Fahrer' is more general: it can also be someone in a bus, truck, train, or another vehicle. 'der Autofahrer' is more precise and means only a person who drives a car. Learners may confuse the words because a car driver is always also a driver. If the vehicle is important, 'Autofahrer' is more precise. If the vehicle is not important or can vary, 'Fahrer' fits better.

Der Fahrer des Busses hat wegen des Wetters langsam gebremst.
The bus driver braked slowly because of the weather.
Bei schlechtem Wetter müssen Autofahrer besonders vorsichtig fahren.
In bad weather, drivers need to drive especially carefully.