
Tesla Model 3 Teardown: The Nitty Gritty Details - MotorTrend
- by Motor Trend
- May 03, 2018
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Last week Sandy Munro gave us an exclusive walk-through of his shop's racks and tables strewn with Tesla Model 3 parts his team had meticulously dismantled and scrutinized. The Munro team had conducted a 6,000-hour teardown of one of the most closely watched new-vehicle launches in history—and the evaluations were mixed. Although the Model 3 received praise for its many technological advances, the Tesla build quality and body engineering left much to be desired.
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This week Munro & Associates formally presented its results to the Automotive Press Association, with Munro's vehicle manufacturing and electrical engineering experts presenting their comprehensive findings. Most of the "eye-catching features" these experts presented fall into the category of industry-disrupting innovation. Then there's the body, which is another matter altogether. Channel your inner geek for all the nittiest, grittiest details.
Read more about the Model3:
Tesla Model 3 Teardown: Deconstructed 3 See All 53 Photos
All-Wheel-Drive Prep—This photo shows the front knuckle, which clearly has a hole machined for an axle input (then plugged). The lower end of the shock would need to be forked or dog-legged to accommodate the half-shaft. The front cradle also protects space for the motor. Note the control arm at the top and the two links at the bottom that provide stiff lateral bushings for handling precision and compliant longitudinal bushings for ride. Also note that the rear suspension carrier is isolated; the front is hard-mounted for handling precision. Perhaps the front motor will be isolated from the hard-mounted cradle?
Front Upper Control Arm—These are formed of thinner-gauge stamped steel then reinforced by having plastic webbing molded inside. This plastic also provides attachment points for routing the ABS sensor wiring. The oddity: Note the ingot of iron that is glued in place (held by zip-ties while glue sets). Munro reckons this is to dampen a troublesome natural frequency. It remains to be seen if AWD Model 3s will require this.
Upper Shock Mount Casting—This unusual casting incorporates both the upper shock mount and the upper control-arm bushings and mounts. Munro guesses this unusual approach simplifies the procedure for marrying the front suspension module with the body.
Electric Power Steering—The control board shown in the Ziploc bag controls the electric steering assist motor. It appears to feature two separate 12-volt power inputs, probably to provide the redundancy required for fully autonomous driving.
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