{"nhtsa_id":629024,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-03-26","date":"2002-01-24","document_id":"4326","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE","mfr_system":null,"summary":"SOME VEHICLES MAY EXHIBIT OSCILLATING RPM AT CRUISING SPEEDS WITH A STEADY THROTTLE, DESCRIBED AS A SURGE FEELING WHILE ON THE HIGHWAY, OR THE TACHOMETER NEEDLE MAY FLUCTUATE SLIGHTLY. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/629024","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"VOLVO","model":"S80","year_from":2001,"year_to":2001,"match":"exact","vehicle_ids":["2001_volvo_s80"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}