How much is the dealer price? I think the only way to tell if they are the same (as in made in the same factory) is to have both side by side and look with a magnifying glass and a discerning eye.

I eliminated mine totally when I was chasing an air leak and am happy with the results. One less source of air leak to deal with.

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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