Three of the words will be in the same classification, the remaining one will…

Concept

In a classification (odd-one-out) verbal reasoning question, three items share one relationship while the fourth follows a different one. A common criterion is the part-whole relationship: several items are individual components that combine to form a larger whole, while one item IS that whole object.

Application

Tyre, steering wheel, and engine are each individual components that get assembled together to build a car -- they share the 'part of a car' relationship. Car itself is not a component; it is the complete, assembled whole object made up of parts such as these. So car does not belong with the other three parts.

Cross-check

Testing another possible criterion -- 'related to vehicles' -- every word satisfies it equally, so that grouping fails to separate one word from the rest. Only the part-versus-whole criterion cleanly isolates one word, confirming car is the one that does not belong.