The Rimac concept car has demonstrated the ability of digital torque vectoring to allow a car to mimic steering characteristics that were previously fixed because they were part of the car’s basic engineering (e.g. understeer or oversteer). The Rimac still uses hydraulic steering with turnable front wheels. Could the Model 3 do away with mechanical steering replacing it with digital all-wheel torque vectoring? What would be the disadvantages? What would be the advantages? With so many other radical design changes included in the Model 3 it could be psychologically a 'bridge too far'. Upfront design issues would be substantial but, if conceptually feasible, could result in further reduction in the cost of manufacturing. Four motors would be needed to provide all-wheel drive, many additional sensors would be required and complex controls would be needed to simultaneously and individually power or brake each wheel (the Rimac controls torque to each wheel 100 times a second). Offsetting that additional complexity the suspension and power train would be further simplified and the mechanical steering components completely eliminated. How limiting would it be to do away with mechanical steering and to steer simply by controlling the relative speed of the four wheels? · Clearly it can be done and in simple highway driving may have some advantages. Poor wheel alignment is a major cause of tire wear. If the front wheels were fixed like the rear, alignment wear would disappear. · Driving on poor road conditions or on unpaved roads would be much safer and significantly improved. · But would the turning circle of the car be worsened or improved. With mechanical steering the turning circle is limited by the design chosen. As individual wheels could be stopped or reversed to facilitate tight turning (e.g. in a car park) what would determine the limits of such turns? Would there be costs in terms of increased tire wear, for example. If turning tire wear was increased, would it be more than offset by the reduction in mechanical alignment issues wear?