RoadVitals

1999 Mercury Grand Marquis Engine Problems

Owner-reported complaints naming the engine system, filed with NHTSA

Data refreshed

Engine reportsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
33
Latest Jan 25, 2022
Share of all reportsThis category as a share of every owner report on file for this model year. One report can name more than one component, so the categories overlap.
20%
of 164 total
Crash or fire reportedReports in this category whose submitter recorded that a crash or a fire occurred. The reporter's own answer on the NHTSA form, not a verified finding.
1
Injuries or deaths reportedTotals the submitters entered on their own reports in this category. Not verified by NHTSA and not a casualty statistic.
1

What this page shows

Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components. Every record below is an owner-reported complaint about the 1999 Mercury Grand Marquis submitted to NHTSA — not a confirmed defect, not a recall and not a manufacturer bulletin. 33 reports on file name it.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Owner reports naming engine

The 25 most recent of 33, in the owner's own words

Engine
Filed Jan 25, 2022

The contact owns a 1999 Mercury Grand Marquis. The contact stated that the vehicle had a leaking intake manifold. The vehicle was taken to an independent mechanic and diagnosed that the intake manifold needed to be replaced. The vehicle was not repaired. The dealer and manufacturer were made aware of the failure but informed the contact that there was no recall associated with the VIN. The failure mileage was approximately 120,000.

NHTSA ID
11448881
Incident
Dec 15, 2021
Mileage
120,000 mi
Engine
Filed Apr 10, 2019

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

NHTSA ID
11195369
Incident
Apr 9, 2019
Mileage
112,004 mi
Engine
Filed Jan 5, 2018

TL* THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. WHILE THE VEHICLE WAS PARKED WITH THE ENGINE RUNNING, THE CONTACT SHIFTED INTO REVERSE AND NOTICED STEAM COMING FROM THE HOOD. THE VEHICLE WAS THEN SHIFTED BACK INTO PARK AND TURNED OFF THE ENGINE. UPON OPENING THE HOOD, THE CONTACT NOTICED THAT A PART OF THE MANIFOLD WAS MISSING THE THERMOSTAT. THE CONTACT WAS UNSURE OF ANY WARNING INDICATORS ILLUMINATING. THE CONTACT WENT TO BILL MACDONALD FORD (1200 S CARNEY DR, ST CLAIR, MI 48079, (810) 329-6601) AND WAS INFORMED THERE WERE NO RECALLS. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. THE FAILURE MILEAGE WAS APPROXIMATELY 135,000.

NHTSA ID
11060700
Incident
Dec 20, 2017
Mileage
135,000 mi
Engine
Filed Apr 21, 2017

PLASTIC INTAKE MANIFOLD FAILED, ANTIFREEZE LEAKING FROM AROUND THERMOSTAT DUE TO THIS FAILURE AND LEAKING INTO COIL PACKS AND CAUSING MAJOR MISFIRE IN MOTOR. HAPPENED SUDDENLY, NO INDICATION OF LEAK PRIOR TO THIS FAILURE. WAS DRIVING WHEN THIS HAPPENED AND HAD TO CALL FOR HELP TO GET VEHICLE BACK HOME, AND NOW CAN'T DRIVE IT . COST TO FIX IS EXPENSIVE, AND THE CAR RAN GREAT UNTIL THIS HAPPENED. SOUNDED LIKE I HAS THROWN A ROD, POPPING LOUDER ON EXCELERATION, SO I IMMEDIATELY PARKED IT AND TURNED OFF THE MOTOR.

NHTSA ID
10979720
Incident
Apr 19, 2017
Mileage
185,000 mi
ElectricalEngineExterior lighting
Filed Apr 12, 2017

INTAKE MANIFOLD FAILED (BURNED AND DISINTEGRATED IN THE AREA OF THE THERMOSTAT ) AND HAD TO BE REPLACED AT CONSIDERABLE EXPENSE . PRESENTLY THE SPEEDOMETER FAILS INTERMITTENTLY DROPPING TO ZERO AT RANDOM MOMENTS. MOST IMPORTANTLY THE LIGHTS CUT OUT INTERMITTENTLY USUALLY WHEN THE HEAT IS ON AND ON LONGER TRIPS. ALSO, MOST TIMES IT HAS HAPPENED WHEN IT HAS BEEN RAINING AND COLDER. DROVE UPWARDS OF 40 MILES WITH THE HEADLIGHTS CUTTING OUT INTERMITTENTLY IN THE RAIN AND COLD, PROBLEM HAS CONTINUED TO RECUR BUT SEEMS TO BE RELATED POSSIBLY TO HAVING THE HEAT ON. I BELIEVE THE LIGHTING CONTROL MODULE IS LOCATED NEAR A HEATING OUTLET AND MAY BE SUFFERING A FAILURE AS A RESULT BUT THIS IS JUST SPECULATION. ALSO, PREVIOUSLY WHEN I HAD PULLED INTO A REST AREA FOR AWHILE, AFTER COOLING DOWN, THE PROBLEM WENT AWAY FOR A LITTLE WHILE THEN RESUMED AFTER ABOUT TEN MILES WITH THE HEAT ON. I BELIEVE IT IS BEING CAUSED BY THE EXCESSIVE HEAT THE LCM IS SUBJECTED TO BY VIRTUE OF THE AREA IN WHICH IT IS INSTALLED. THE LIGHTING CONTROL MODULE IS OF MOTOROLA MANUFACTURE WITH SIEMANS RELAYS INSIDE. THE PART HAS NUMEROUS NUMBERS ON IT , MOST PROMINENTLY: XW7T-13C788-AA , 6MX2794A01, 990429A, AND LIGHTING CONTROL 95M .OTHERS ONLINE WITH SIMILAR VEHICLES (CROWN VICTORIAS) AND OF OTHER MODEL YEARS MANUFACTURED BY FORD HAVE REPORTED SIMILAR PROBLEMS AND THAT REPLACING THE RELAYS HAS RESOLVED THE ISSUE. I DO NOT KNOW THAT THIS PART IS THE SOURCE OF THE PROBLEM BUT SUSPECT IT AS MANY OTHERS ONLINE HAVE REPORTED THAT THIS PART WAS THE SOURCE OF THEIR PROBLEMS.

NHTSA ID
10972145
Incident
Nov 27, 2016
Mileage
118,000 mi
Driver assistanceEngine
Filed Dec 12, 2014

MY CAR WAS IN DRIVE AT A BUSINESS TRAFFIC INTERSECTION DRIVE WAY ON A SLIGHT HILL WITH THE BRAKES ON WHEN THE ENGINE SURGED AND THE CAR STARTED TO REVERSE WHILE STILL IN DRIVE. I HAD TO PUT CONSIDERABLE PRESSURE ON THE BRAKES TO STOP IT. I CHECKED AND THE SHIFT LEVER WAS STILL IN DRIVE. MY CAR HAS BEEN PROPERLY MAINTAINED AND WAS RECENTLY SERVICED WITH ALL REQUIRED SERVICES DONE. THIS REALLY SCARED ME AND I WOULD HAVE CRASHED INTO A CAR IF IT WAS BEHIND ME. FORD SHOULD LOOK INTO THIS SAFETY PROBLEM. *TR

NHTSA ID
10663813
Incident
Dec 11, 2014
Mileage
108,000 mi
Engine
Filed Aug 25, 2014

DRIVING ON THE HWY AND THE CAR STARTED TO OVERHEAT WITH HOT STEAM SHOOTING OUT FROM THE ENGINE AND IT ALSO HAD A STRONG COOLANT SMELL. THE CAR COULD NOT BE DRIVEN UNTIL L IT HAD $1,500 IN REPAIRS FOR A KNOWN, LEAKING PLASTIC MANIFOLD ISSUE. THIS FAILED PART CRACKS AND LEAKS INTO THE HOT ENGINE AREA. AND, FORD HAD REDESIGNED THE FAILED PART. ADDITIONALLY, FORD HAD ONCE OFFERED FREE FIXES FOR A FEW MONTHS FOR POLICE CARS AND TAXI CABS WITH THE SAME ENGINES UNDER A CLASS ACTION LAW SUIT BUT DIDN'T TELL THE OWNERS ABOUT. THOUSANDS OF CONSUMERS WERE RIPPED OFF BECAUSE FORD SHOULD HAVE FIXED THIS ISSUE UNDER THE CLASS ACTION RECALL. BUT THEY DIDN'T BOTHER NOTIFY ANYONE ABOUT THE THREE MONTH RECALL WINDOW. IN CHECKING THE NHTSA RECORDS, THERE ARE THOUSANDS OF US WITH THE SAME REPORTED PROBLEM. PLEASE TAKE SOME CORRECTIVE ACTION FOR US. *TR

NHTSA ID
10628275
Incident
Aug 19, 2014
Mileage
98,000 mi
Engine
Filed Nov 21, 2013

TL* THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT WATER WAS LEAKING FROM UNDER THE VEHICLE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSIS WHERE THE CONTACT WAS ADVISED THAT THE INTAKE MANIFOLD WOULD HAVE TO BE REPLACED BECAUSE IT WAS FRACTURED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 114,000.

NHTSA ID
10553218
Incident
Nov 2, 2013
Mileage
114,000 mi
Engine
Filed Sep 26, 2013

PLASTIC INTAKE MANIFOLD ON 4.6 LITER ENGINE FOUND TO BE CRACKED AND LEAKING COOLANT. THE LOSS OF COOLANT RESULTS IN THE VEHICLE BECOMING DISABLED AND/OR UNSAFE TO DRIVE. LEAKING COOLANT IS ALSO TOXIC TO CHILDREN AND ANIMALS, AS THEY ARE MORE LIKELY TO BE IN CONTACT WITH COOLANT ON THE GROUND OR GARAGE FLOOR. THIS DEFECTIVE PART (PLASTIC INTAKE MANIFOLD) WAS IDENTIFIED BY FORD MOTOR COMPANY AS DEFECTIVE AND QUIETLY SETTLED IN A CLASS ACTION LAWSUIT. REPLACEMENT PARTS HAVE BEEN REDESIGNED. HOWEVER, FORD DID NOT CONTACT CUSTOMERS WITH THIS MODEL CAR TO NOTIFY THEM OF THE DEFECTIVE PART OR TO OFFER RESOLUTION. EARLIER MODELS OF THIS ENGINE (AND ALL OTHER ENGINES) USED A METAL INTAKE MANIFOLD. THESE WERE NOT PROBLEMATIC. INTAKE MANIFOLDS ARE NOT A MOVING PART OF THE VEHICLE ENGINE, AND ARE NOT SUBJECT TO WARE. THE PLASTIC MATERIAL USED IN THE PROBLEM MANIFOLDS ARE NOT ABLE TO WITHSTAND THE NORMAL TEMPERATURE FLUCTUATIONS OF A VEHICLE ENGINE AND ARE THEREFORE PRONE TO FAILURE. FORD HAS BEEN CONTACTED IN AN ATTEMPT TO RESOLVE THIS ISSUE, BUT THE COMPANY HAS DECLINED TO OFFER ANY RESOLUTION WHATSOEVER. *JS

NHTSA ID
10545549
Incident
Aug 15, 2013
Mileage
191,800 mi
Engine
Filed Dec 15, 2011

TL* THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT THE VEHICLE WOULD STALL SPORADICALLY AND WITHOUT WARNING. A LOCAL MECHANIC DIAGNOSED THAT THE INTAKE MANIFOLD WOULD NEED TO BE REPLACED. THE DEALER WAS CONTACTED, BUT DENIED ANY ASSISTANCE WITH REPAIRS TO THE DEFECT. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE AND THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 90,200 AND THE CURRENT MILEAGE WAS 91,000.

NHTSA ID
10440044
Incident
Dec 1, 2011
Mileage
90,200 mi
EnginePowertrain (other)Tires & wheels
Filed Oct 3, 2011

VEHICLE WOULD SHAKE VIOLENTLY AT ANY SPEED FROM 45-80MPH. TOOK TO A MECHANIC SAID THE FRONT END NEEDED TO BE REPLACED. $800.00 LATER IT STILL DID IT, THEN TOOK BACK SAID THE TIRES NEEDED TO BE REPLACED ALTHOUGH WE HAD 80,000 MILE TIRES, AND ONLY HAD 35,000 MILES PUT ON THEM. REPLACED THE TIRES FOR $600.00. STILL SHOOK, TOOK TO A DIFFERENT MECHANIC SAID IT WAS THE TRANSMISSION FAILING. DURING SCHEDULED MAINTENANCE FOUND CRACKED INTAKE MANIFOLD, ANTIFREEZE AND OIL IN SPARK PLUGS, CLEANED OUT CHANGED SPARK PLUGS, RAN FINE UNTIL THE MANIFOLD LEAKED MORE COOLANT INTO THE SPARK PLUGS AND NOW WE ARE AT SQUARE ONE. RESEARCHED ONLINE FOUND A BUNCH OF PLACES SAYING IT WAS RECALLED, WHEN I CALLED THE DEALERSHIP THEY SAID NO RECALLS. PRICE OF REPLACING THE PART WAS $615.00 IF I HAD ONE ALTERNATOR, OR $650.00 IF I HAD ANOTHER. *TR

NHTSA ID
10428282
Incident
Jun 25, 2010
Mileage
80,000 mi
Engine
Filed Mar 8, 2011

WHILE DRIVING, (AT ANY SPEED)THE CAR'S ENGINE SHUT DOWN SEVERAL TIMES. EACH TIME I HEARD A "BEEP" AND WARNING LIGHTS CAME ON- CHECK ENGINE, TRACTION CONTROL AND ABS. AFTER A MINUTE OR SO, THE ENGINE WOULD START NORMALLY. THE ENGINE SHUT DOWN 6 TIMES ! EACH TIME I HEARD THE "BEEP" AND WARNING LIGHTS ILLUMINATED INCLUDING TRACTION CONTROL AND CHECK ENGINE LIGHTS. I WAS ON MY WAY HOME WITH MY NEWBORN IN THE CAR,IT JUST CUTS OFF, AND IT NEARLY CAUSED AN ACCIDENT ON THE HIGHWAY AS MANY OTHER CARS ALMOST RAN INTO ME BECAUSE THE CAR SHUT OFF WHILE I WAS DRIVING ON THE HIGHWAY. THIS IS A VERY DANGEROUS CONDITION, ESPECIALLY AS POWER STEERING AND POWER BRAKES ARE LOST ON SHUT-DOWN. I AM LITERALLY AFRAID OF DRIVING MY VEHICLE AS NO ONE KNOWS WHAT IS WRONG WITH MY VEHICLE. THIS NEEDS TO BE ADDRESSED ASAP AS SOMEONE COULD GET SERIOUSLY HURT OR KILLED. INCLUDING CHILDREN!....BY THE WAY, THIS HAS BEEN HAPPENING ALL WEEK. *TR

NHTSA ID
10386939
Incident
Mar 8, 2011
Mileage
183,172 mi
Engine
Filed Feb 2, 2011

I RECEIVED NOTICED OF INTAKE MANIFOLD ON FORDS PASSENGERS CARS FAILURE AND OF THE SETTLEMENT OFFERED TO REPAIR AND WARRANT SAID INTAKE MANIFOLD. AT THAT TIME I OWNED A 1999 GRAND MARQUIS LS. BEFORE GETTING SAID NOTICE I HAD TOOK MY CAR TO LANDERS FORD DEALERSHIP IN JACKSON,MS HWY 80 WEST WHERE THE INTAKE MANIFOLD WAS REPAIRED BY DEALERSHIP BECAUSE OF FAILURE OUT OF POCKET EXPENSE COST ME $879.00 WHEN I RECEIVED NOTICED OF LAWSUIT AND OR CLAIMS ON SAID INTAKEMANIFOLD I RETURNED TO THAT DEALERSHIP BUT WAS TURNED AWAY WITH NO RESOLVE SAID DEALERSHIP WENT OUT OF BUSINESS MONTHS LATER NEVER TO COMPENSATE ME FOR OUT OF POCKET EXPENSE OR GIVING ME EXTENDED WARRANTY INFO.FORD CORPORATE OFFICE REFUSE TO HELP AFTER I EXPLAIN I HAD MY RECEIPTS TO SAID CLAIM AND GAVE ME NO LEAD WAY OF WHAT TO DO.NOW I AM STUCK WITH NO WARRANTY NO OUT OF POCKET COST AND THE SAME CAR NEEDING THE SAME WORK DONE AGAIN HERE IN 2011 FORD HANDLED THIS LAWSUIT CLAIMS VERY VERY POORLY AND INFO HAS IT THAT FORD HAS STOP MAKING THE GRAND MARQUIS AND CROWN VICTORIA. *TR

NHTSA ID
10380003
Incident
Jun 9, 2004
Mileage
65,000 mi
Engine
Filed Jan 19, 2011

CRACKED THE AIR INTAKE ON MY 1999 MERCURY GRAND MARQUIS. IT WAS MADE OUT OF CHEAP PLASTIC. I HAD TO STEP ON THE THROTTLE TO GET OUT OF THE WAY, AND MY CAR STARTED STEAMING. COME TO FIND OUT, THE INTAKE MANIFOLD CRACKED. IT'S ONLY $300 FOR THE PART, NOT INCLUDING LABOR. *TR

NHTSA ID
10377186
Incident
Jan 18, 2010
Mileage
120,000 mi
Engine
Filed Mar 19, 2010

FATIGUE CRACKING OF THE COOLANT CROSSOVER PASSAGE OF THE ALL NYLON-COMPOSITE INTAKE MANIFOLD ON OUR 1999 MERCURY GRAND MARQUIS. (VIN # [XXX]). COMPONENT HAS FAILED, RESULTING IN REPLACEMENT, COSTING $888.00 COMPONENT WAS SUBJECT TO RECALL (HTTP://FORDMANIFOLDSETTLEMENT.COM/NOTICE.HTML). CONTACTED FORD CUSTOMER CARE PHONE LINE. THEY HAVE REFUSED TO COMPENSATE US OR THIS REPAIR. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

NHTSA ID
10321044
Incident
Feb 8, 2010
Mileage
68,000 mi
Engine
Filed Feb 1, 2010

WE NEVER RECEIVED NOTIFICATION OF THE MANIFOLD DEFECT AND RECENTLY DISCOVERED THAT THERE WAS A RECALL. OUR CAR IS A 1999 GRAND MARQUIS WITH CRACKED MANIFOLD INTAKE. WE TOOK IT TO THE LOCAL DEALER AND THEY SAID THAT THEY CANNOT DO ANY WARRANTY ADJUSTMENTS SINCE THE DEADLINE WAS EXHAUSTED. WE CALLED SUMMER OF 2009 TO LET THEM BE AWARE OF THIS PROBLEM. THOUGH THEY WERE NICE, THEY WERE STILL FIRM ON DENYING US REPAIR OR ADJUSTMENTS UNDER THE LAW SUIT AND RECALL. NOW WHAT DO WE DO SINCE WE NEVER RECEIVED NOTIFICATION NOR WERE WE AWARE OF ANY PROBLEM WITH THE CAR? *TR

NHTSA ID
10303603
Incident
Nov 1, 2009
Mileage
100,000 mi
Engine
Filed Oct 26, 2009

TL* THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. HE COULD NOT ACCELERATE PAST 30-35 MPH. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER FOR DIAGNOSTIC TESTING. THE TECHNICIAN STATED THAT THE FAILURE WAS BECAUSE OF A PLASTIC INTAKE MANIFOLD. THE VEHICLE WAS REPAIRED WITH THE REPLACEMENTS OF A METAL INTAKE MANIFOLD AND SPARK PLUGS. THE FOLLOWING DAY AFTER THE SERVICE REPAIR, HE EXPERIENCED ROUGH IDLING WHILE STARTING THE ENGINE COLD. THE AUTHORIZED DEALER WAS NOTIFIED OF THE FAILURE, BUT NO REMEDY WAS AVAILABLE. THE FAILURE MILEAGE WAS 54,300. THE CURRENT MILEAGE WAS UNAVAILABLE.

NHTSA ID
10289817
Incident
Jan 11, 2009
Mileage
54,300 mi
Engine
Filed Jan 1, 2009

CRACKED INTAKE MANIFOLD ON A 1999 MERCURY GRAND MARQUIS WITH ONLY 52000 MILES ON IT. COST $1200 TO REPAIR. WAS NOT NOTIFIED OF RECALL. 52000 MILES IS ONLY ABOUT 4.3 YEARS OF ACTUAL USE. IT IS UNFAIR THAT LOW MILEAGE DRIVERS SHOULD BE PUNISHED FOR CONSERVING ENERGY. *TR

NHTSA ID
10253424
Incident
Aug 10, 2008
Mileage
52,000 mi
Engine
Filed Jan 24, 2008

TL*THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. WHILE DRIVING AT AN UNKNOWN SPEED, THE VEHICLE HESITATED, STALLED, AND THE CHECK ENGINE LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE VEHICLE ALSO BEGAN TO LOOSE COOLANT. THE VEHICLE WAS TAKEN TO A DEALER AND THEY DISCOVERED THAT THE INTAKE MANIFOLD WAS CRACKED. THERE WAS NO RECALL ON THE INTAKE MANIFOLD. THE CURRENT MILEAGE WAS 88,000 AND FAILURE MILEAGE WAS 87,500.

NHTSA ID
10215854
Incident
Dec 14, 2007
Mileage
87,500 mi
Engine
Filed Nov 25, 2007

I NOTICED COOLANT LEAKING FROM SOMEWHERE IN THE ENGINE COMPARTMENT, BUT INITIALLY HAD TROUBLE FINDING WHERE THE LEAK WAS COMING FROM. I FINALLY DISCOVERED THAT THE INTAKE MANIFOLD WAS CRACKED AT THE PLASTIC THERMOSTAT HOUSING. *TR

NHTSA ID
10209851
Incident
Nov 19, 2007
Mileage
150,000 mi
Engine
Filed Sep 7, 2007

TL*THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. WHILE DRIVING 45 MPH, THE TEMPERATURE GAUGE ON THE VEHICLE BEGAN TO INCREASE. THE CONTACT PULLED OVER TO ALLOW THE VEHICLE TO COOL BEFORE DRIVING HOME. ONCE SHE ARRIVED HOME, SHE NOTICED SMOKE RISING FROM THE FRONT END OF THE VEHICLE. THIS SAME FAILURE HAS PREVIOUSLY OCCURRED TWICE. THE VEHICLE WAS TAKEN TO A MECHANIC AND HE STATED THAT THE INTAKE MANIFOLD NEEDED TO BE CHANGED. THE CURRENT AND FAILURE MILEAGES WERE 123,052.

NHTSA ID
10202211
Incident
Aug 8, 2007
Mileage
123,052 mi
Engine
Filed May 3, 2007

HAD SPARK PLUGS REPLACED. ONE PLUG EXPLODED. WAS TOLD BY FORD DEALERSHIP SERVICE MECHANIC THE INTAKE MANIFOLD WAS CRACKED. CAR WAS RUNNING FINE BEFORE PLUGS WERE REPLACED. INTAKE MANIFOLD IS PLASTIC. (THIS WAS AN ISSUE WITH THE 1997 MODEL.) DID THE REPAIRMAN CRACK THE MANIFOLD? WHY IS REPLACEMENT PART STILL PLASTIC? FORD/MERCURY PRICE FOR PART IS $598.06; NAPA IS $281.00. *JB

NHTSA ID
10189687
Incident
Apr 28, 2007
Mileage
138,000 mi
Engine
Filed Dec 1, 2006

DT*: THE CONTACT STATED WHILE DRIVING 40 MPH, THE ENGINE HESITATED AND IDLED BADLY AT A STOP. THE CONTACT REPLACED THE FUEL FILTER, BUT PROBLEM CONTINUED. WHEN TAKEN TO AN INDEPENDENT SERVICE DEALER, THE DIAGNOSTICS SHOWED THE MANIFOLD WAS CRACKED. THE MANUFACTURER WAS NOTIFIED. THE CONSUMER STATED THE VEHICLE WOULD SJIP AND JUMP. UPDATED 12/18/06. *JB

NHTSA ID
10174876
Incident
Nov 29, 2006
Mileage
77,980 mi
Engine
Filed Jul 2, 2006

CRACKING PLASTIC INTAKE MANIFOLD ON MERCURY V-8 CAR OVER HEATS DUE TO WATER/COOLANT LEAKING LOOKING INTO GETTING FIXED. *JB

NHTSA ID
10161231
Incident
Jun 24, 2006
Mileage
158,200 mi
Engine
Filed Jul 20, 2005

I HAVE A 1999 MERCURY GRAND MARQUIS. THE PLASTIC INTAKE MANIFOLD CRACKED. I HAVE LEARN THAT THIS IS A PROBLEM ALOT OF PEOPLE HAVE WITH THE FORD VEHICLES.

NHTSA ID
10129462
Incident
Jul 14, 2005
Mileage
103,000 mi

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.

Other components reported on this vehicle

Categories with enough reports to have a page of their own

Elsewhere on this vehicle

Data sources

Data on this page last refreshed .