If you are not comfortable with this procedure please return your Shark Injector™ to your retailer for a prompt refund; 2. Locate the rectangular 16 pin OBD-II port in the interior of your BMW. It will generally be found in the driver’s under-dash area, or on the forward end of the passenger side of the transmission tunnel. It is covered by flip-top plastic cover engraved with the word “OBD”. In some cases there is a second removable “trim cover” over the actual plug assembly. Remove the “trim cover” if necessary, and open the flip-top cover to gain access to the OBD-II diagnostic port;
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