I took a quick resistance reading of both sensors with a DVM and the sensor on the right (temp gauge) has approx 10x higher resistance than the one on the left (EGR control). So on my 85, I'd say they are not interchangeable.
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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked
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