There is definitely a design language which distinguishes a well designed brand across its products. Chris Bangle made his own divergence in that language, but things have returned to a saner state.
One must remember that modern automobile design is heavily influenced by aerodynamics, crash survival, weight and even regulatory quirks that make it beneficial to place the wheels as close to the corners of the vehicle as possible. It isn't so easy to be distinctive when these factors favor convergence.
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