Originally Posted by Vern_in_IL
Actually it is the supplier that puts effort into this. The car company usually puts pressure on suppliers to reduce cost. Economies of scale do matter, thus high profit, high volume lines, like Toyota Camry get far more attention to design than say Nissan. Nissan also treats it's suppliers really poorly, demanding price cuts to the point where suppliers loose money.
There is a reason the lowly Toyota Corolla has luxury LED headlights.
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It also doesn't hurt that Toyota owns a stake in Koito, a major Japanese automotive lighting vendor and Toyoda Gosei who also supplies LEDs to the automotive market. VAG and Mercedes have a long-time relationship with Hella and Automotive Lighting, a Bosch-Magnetti Marelli joint venture.Toyota and VAG/Mercedes have been the first early adopters of LED headlamps, starting with the Lexus LS600hL/S-Class/A8 and their 3rd/4th generation designs are either focused on cost-point but superior performance(Corolla) or high-end functionality(current S-Class/A8 with multi-LED arrays).