1977
Model range unchanged

odel range was unchanged this year. Both models, 630 CS and 633 CSi, where basicly the same as previous year.
Quality improvements
Improvements where made in the assembly line due to some of the early models where found to have problems with water leaks and body trim fitment. This lead to an improved high pressure water test that still today is part of the build and test process.

Karmann constructed the 6 series coupe, as well as the earlier BMW coupes. In august 1977 this changed when only the steel body shell where made by Karmann and then shipped to BMW's plant in Dingolfing. This was another result of BMW being concerned about the quality and one step to bring most of the assembly “in-house”.
US models
In 1977 the US 630 CSi model was the only US E24 to be equipped with rear head restraints. The US 633 CSi model never had them even in 1978 and later on.
Production numbers for 1977
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Source: Bmwcoupe.nu
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