Toyota had been integral in helping Tesla get off the ground, 4 years ago Toyota invested $50 Million into the then nascent automaker, in exchange Tesla would supply battery packs for the RAV4 EV. Toyota even sold Tesla the NUMMI facility where all Teslas are currently produced.
Well the honey moon is well over...
Bloomberg reports the relationship — coming to a close with the end with the RAV4 EV program and Toyota’s new focus on hydrogen — was marred early on when engineers for both automakers fought over the EV crossover’s parking brake and an enclosure that would protect its battery from the road. Further, proprietary issues between Tesla and Toyota regarding energy-capture systems strained development of the crossover’s own system.