Lower temp (75C) E34 thermostat

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Not sure about the particular brand. But the lower temp thermostat should be readily available in most bmw workshops if not all (if ordering ebay is what you're thinking of doing).

I would go for the lower temp thermostat my self in my next service also. Don't see any down side to it that the flow is started at lower temp rather than at 90+ degrees.
 
Change the low temp thermostst,only go down 5degree,then better change the low temp FAN SWITCH!!!going down 10 degree.
 
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