I bought the Lasso one, it was supposedly the same company that makes the OEM one. The housing did look like it, but the vanes of the pump were slightly fatter, and with slightly less depth. But, I think it will be fine, it fit with no issues at all, but I have not run the engine yet.

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1983 W123 300TD US spec Turbo engine, with Euro bumpers and manual climate control, and manual transmission.