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Service bulletins for the 1999 Mercury Cougar

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.

229 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Exhaust and emissions are shown. Show all

Bulletins, newest first
171742003-11-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. MALFUNCTION INDICATOR LAMP ON AND DIAGNOSTIC TROUBLE CODES P0171/P0174 OR P1072/P0175 STORED IN MEMORY OR AS HARD FAULTS. HESITATION, LACK OF POWER OR RUNS ROUGH CONDITION. *TT
153902002-04-17. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). SOME VEHICLES MAY EXHIBIT A CHECK ENGINE LIGHT AND/OR EGR DIAGNOSTIC TROUBLE CODES 332, P0401, P1407 (LACKOF EGR FLOW). *TT
145962001-04-02. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. EXHIBITING ONE OR MULTIPLE STUDS BREAK ON EXHAUST FLANGES. *JB
145422001-03-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. SOME VEHICLES MAY EXHIBIT ONE OR MULTIPLE THREADED STUDS BREAK ON THE EXHAUST FLANGES. THIS MAY BE NOTED BY A RATTLING NOISE, EXHAUST LEAK OR A SCRAPING NOISE WHEN DRIVING. *TT
002522001-03-13. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. ON SOME VEHICLES, AN OBJECTIONABLE EXHAUST, SULFUR, OR ROTTEN EGG ODOR FOLLOWING AGGRESSIVE DRIVING, SUCH AS FULL-THROTTLE ACCELERATION MAY OCCUR. *TT
130932000-11-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. SOME VEHICLES EQUIPPED WITH 2.5L MAY EXHIBIT A SULFUR SMELL FROM THE EXHAUST. (T
73112000-03-31. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. SOME VEHICLES WITH CD4E AUTOMATIC TRANSACLE MAY EXHIBIT AN OBJECTIONABLE SULFUR OR ROTTEN EGG ODOR FROM THE EXHAUST FOLLOWING AGGRESSIVE DRIVING. *TT
992372000-03-09. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. OBJECTIONABLE EXHAUST, SULFUR, OR ROTTEN EGG ODOR AGGRESSIVE DRIVING ON VEHICLES WITH 2.5L ENGINE AND CD4E TRANSAXLE. *TT
99130291999-12-07. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. ENGINEERING IS CURRENTLY INVESTIGATING CONCERNS WITH 2.5L VEHICLES EXHIBITING A SULFUR SMELL FROM THE EXHAUST. *TT
9967461999-12-02. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. CUSTOMERS MAY COMPLAIN OF A SULFUR SMELL FROM THE EXHAUST ON VEHICLES EQUIPPED WITH A 2.5L. *TT
9820101999-03-02. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. EXPERIENCING A " BUZZING " OR " RATTLING " NOISE FROM THE EXHAUST SYSTEM. *YC

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.