Вот эта опция 961
Цитата:
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S961A SONDERMOTOR Специальный двигатель
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Идет на М52 моторе. На М62 ниразу не встречал, даже гугл не знает.
Но, нашел вот еще что:
Цитата:
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S961A - indicates that you have the Alusil engine...the BMWs imported to North America were identified as receiving these engines after the Nikasil debacle of the mid 90s. Starting with the 1996 model year...all BMW models imported here that received engines that still were using Nikasil in other parts of the world...were identified with this option code to assure that the engine was Alusil (M62 & M52/M52TU engines I know for sure).
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И согласно этой записи, к чугунному блоку это отношение не имеет, а как раз относится к алюсилу и никосилу.