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Service bulletins for the 1991 Mercury Grand Marquis

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.

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

By type

By component

By trouble code

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
998161999-08-19. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. FORD MOTOR COMPANY NOW RECOMMENDS SAE 5W-30 VISCOSITY GRADE FOR SERVICING ANY FORD GASOLINE-POWERED VEHICLE REGARDLESS OF MODEL YEAR. *TT
9823101999-03-03. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. MASS AIR FLOW (MAF)- SENSOR CONTAMINATION- SERVICE TIP. *AK
98741998-07-24. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. A NEW SILICONE GASKET AND SEALANT. *YC
98641998-07-21. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. INFORMATION ON A BUZZING OR RATTLE NOISE FROM THE EXHAUST SYSTEM. *TT
BC51839610011997-04-24. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. AN OIL LEAK IN THE AREA OF THE ENGINE OIL FILTER MAY BE CAUSED BY A DAMAGED OR MIS-INSTALLED (I.E. ROLLED OVER, PINCHED, SHEARED, NICKED, ETC.) OIL PUMP BODY SEAL. *TT
BC30329504011995-11-01. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER; SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC; ENGINE AND ENGINE COOLING:ENGINE; POWER TRAIN:AUTOMATIC TRANSMISSION; EXTERIOR LIGHTING:HEADLIGHTS; ELECTRICAL SYSTEM:IGNITION:MODULE; STRUCTURE:BODY:DOOR. UNKNOWN
95821995-11-01. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER:MOTOR; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. A REVISED SERVICE WINDSHIELD WIPER MOTOR IS NOW AVAILABLE. *TW
95681995-11-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. REVISED OIL PAN GASKET. *TW

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