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Registered
Join Date: Dec 2019
Location: Florida Panhandle
Posts: 1,528
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Old one would not hold any vacuum and flapper valve was not moving with engine running. Replaced with superseded part number Pierburg OPB 129061 OEM. Part holds vacuum with a might vac and after install the heater fan flap moves as it should.
Too bad there is not a rebuild kit for this. Replacing the original rubber with a modern silicone diaphragm would be the cheaper fix.
Regards
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