for V6 applications - Mass air flow sensor. Per a Nissan service bulletin, this part replaces the one originally installed on the vehicle. Mass air flow sensor. The service bulletin also advises that the air filter must also be replaced in order for the installation of this part to be considered complete and correct (order filter #16546-0Z000 separately). For some applications, the engine management system will need to be reprogrammed after installation of this part. This will require special tools and/or equipment. Please contact your local dealer for more info. - Mass air flow sensor. Per a Nissan service bulletin, this part replaces the one originally installed on the vehicle. The service bulletin also advises that the air filter must also be replaced in order for the installation of this part to be considered complete and correct (order filter #16546-0Z000 separately). For some applications, the engine management system will need to be reprogrammed after installation of this part. This will require special tools and/or equipment. Please contact your local dealer for more info. -