For cars, weight and fuel efficiency are two important issues. Research has shown that the best way to improve fuel efficiency is to reduce the overall weight of the car, without sacrificing the safety of the passengers. The use of composites in the production of car parts has proven to be able to balance the reducing the weight and preserving passenger safety. The car bumper is one of unique area that has benefited from the use of composite material. In this review, two bumpers made from nylon-6 nanocomposite and polyethylene/palm kernel shell-iron filings composite are analysed. The mechanical properties of these composite materials are then compared to conventional car bumper material such as aluminium and steel, this comparison showed a reduction in weight, cost and environmental impact, disadvantages such as difficulty in mass production and sophistication of the production process were also noted.