Since the original Fiat engine did not have any space for modernization, which was considered as unacceptable by AvtoVAZ, it was replaced with a newer overhead camshaft motor. The car was equipped with rugged drum brakes, as the latter proved to be more reliable on poor roads, and more reliable and up-to-date front and rear suspensions, along with increased ground clearance, modernized transmission, recessed door handles. The work on the new car was conducted by joint groups of NAMI and Fiat engineers, who worked together in Turin and Tolyatti. By the spring of 1970, AvtoVAZ had formed its own team of experienced designers and engineers and worked independently.