| 1 | 0 | 3 | 4 | 3 | 4 |
Mercury Grand Marquis repairs by problem area
Engine (30%)
Transmission and Drivetrain (10%)
Brakes and Traction Control (7%)
Suspension and Steering (20%)
Electrical and Air Conditioning (27%)
Paint, Rust, Leaks, Rattles, and Trim (3%)
Other (3%)
Chart based on 197 repairs.
Mercury Grand Marquis engine repair cost distribution
$2500+ (2%)
$1000 - $2499 (16%)
$500 - $999 (16%)
$100 - $499 (50%)
< $100 (17%)
Chart based on 58 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2009 Mercury Grand Marquis 4dr Sedan
224-horsepower 4.6L V8 4-speed automatic RWD
| 73000 mi US $540 |
Could not put gas in, would shut off pump constantly. After cleaning vent on filler tube and it didn't help, decided EVAP part needed replaced. |
2008 Mercury Grand Marquis 4dr Sedan
224-horsepower 4.6L V8 4-speed automatic RWD
| 134000 mi US $350 |
Replaced fuel injectors and mass air sensor |
2004 Mercury Grand Marquis 4dr Sedan
239-horsepower 4.6L V8 4-speed automatic RWD
| 92000 mi US $900 |
replaced engine control module |
| 114000 mi US $1900 |
could not re-fuel car easily as all attempts resulted in fuel pump shutting off every 5 seconds. needed new fuel tank and wiring harness. waited for shop to locate parts. |
| 115000 mi US $472 |
needed new heater core. Heat only gave fumes. |
| 125000 mi US $1244 |
replaced fuel pump and accelerator return valve |
| 128000 mi US $100 |
Car had loud knock, was a blown rod . we donated the car no longer own |
| 83300 mi US $400 |
Fuel pump went. |
| 37000 mi US $1032 |
fuel pump replaced |
2004 Mercury Grand Marquis 4dr Sedan
224-horsepower 4.6L V8 4-speed automatic RWD
| 25000 mi US $76 |
Vapor Canister Valve |
| 205000 mi US $372 |
engine began missing. OBD-II said #5 missing at start up.nd first 1000 RPM. replaced coil packs and injectors.plastic intake replaced.fuel filter replaced. water pump as well. still missed and shuddered while driving. worse in OVER DRIVE. |
| 131000 mi US $477 |
Cracked intake manifold |
| 136000 mi US $20 |
Engine code P0443. Mechanic replaced gas cap as first step, light persisted. |
2003 Mercury Grand Marquis 4dr Sedan
224-horsepower 4.6L V8 4-speed automatic RWD
| 110000 mi US $200 |
Replace defective coil pack on one cylinder |
| 111800 mi US $400 |
Replace ram air sensor |
| 115000 mi US $500 |
Intake manifold, coil pack |
| 88000 mi US $195 |
Engine missing, replaced plugs and an ignition coil. |
| 107000 mi US $100 |
Replace coil on two cylinders. |
| 108000 mi US $550 |
Replace inner manifold. |
| 66000 mi US $700 |
engine cooling fan stopped working, PCM had to be replaced 500.00 parts + Labor = 700.00 |
| 112800 mi US $600 |
cracked intake manifold |
| 58000 mi US $700 |
2 bad coils were causing misfires. All spark plugs were also replaced. |
| 27264 mi | Camshaft position sensor replaced under warranty. |
| 81000 mi US $124 |
Check Engine light came on. Engine running fine. Water temperature showed cooler than normal. Thermostat replaced. While under repair, coolant flush and coolant replaced. |
| 196000 mi US $15 |
a couple of isolated incidents indicating the thermostat stuck closed. Replaced thermostat. |
| 96000 mi US $1275 |
replace intake manifold |
| 113012 mi US $1069 |
fuel pump replaced intake manifold replaced |
| 116000 mi US $415 |
Serpentine belt idler was chattering. Dealer first thought it was the idler worn out and that the belt was damaged. Turned out to be the engine cooling fan bearing that had worn out. |
| 150000 mi US $300 |
Radiator replaced |
| 157000 mi US $1000 |
exhaust bracket was rusted- replaced |
2002 Mercury Grand Marquis 4dr Sedan
220-horsepower 4.6L V8 4-speed automatic RWD
| 90000 mi US $350 |
Timing chain tensioner arms worn down to the metal, shredded and destroyed, sent metalic flakes all over the engine. Replaced oil pump and all timing components. This is a very common problem on 4.6s, I'm surprised no one else reported!!! |
2001 Mercury Grand Marquis
Engine not specified
| 108000 mi US $100 |
Engine missing |
| 166000 mi US $100 |
Misfire in number 5 cylinder. Found out spark plug failed and caused the coil above the spark plug to fail - Once repaired vehicle ran like new. Does not use oil and purrs like a kitten! They should not have stopped making this model!! |
2001 Mercury Grand Marquis 4dr Sedan
235-horsepower 4.6L V8 4-speed automatic RWD
| 25000 mi | Car is sometimes hard to start when warm. Mechanic suggested aged diaphragm as likely culprit. Not repaired yet. |
| 79000 mi US $6000 |
Cracked intake manifold and previous owner mixing coolants required me to have the engine, radiator, all hoses, intake manifold spark plug boots etc replaced. |
| 81220 mi C $200 |
IACV replaced |
| 84300 mi | replaced all cat. converters 4 of them |
| 91960 mi C $250 |
Replaced egr valve |
2000 Mercury Grand Marquis
Engine not specified
| 136000 mi US $200 |
thermostat |
| 75100 mi US $20 |
misfiring and stuttering while driving. replaced spark plugs, didn't help. Ordered TOSP coils from Amazon for $45. |
| 78000 mi US $45 |
replaced top of spark plug coils, all is fine now. |
2000 Mercury Grand Marquis 4dr Sedan
215-horsepower 4.6L V8 4-speed automatic RWD
| 159000 mi US $300 |
Intake manifold developed hairline crack. Replaced intake manifold. |
| 151800 mi US $100 |
Heater core leaking, had to remove dash and replace inexpensive part. Labor was insane, glad to have a friend to help. |
| 182500 mi US $65 |
Replaced plugs, tried to diagnose system. Found that one COP coil was weak, couldn't diagnose which one. Going to DIY coil replacement at home some day. |
| 177000 mi US $230 |
Install two (2) new mufflers |
| 170000 mi US $100 |
Misfire. Water in plug well, replaced plug boots and two coils. |
| 176000 mi US $150 |
Bad idle, replaced IAC, didn't solve problem. Traced issue down to malfunctioning coil-on-plug. |
| 177000 mi US $150 |
Bad coil, same one replaced again. |
2000 Mercury Grand Marquis 4dr Sedan
200-horsepower 4.6L V8 4-speed automatic RWD
| 68000 mi US $50 |
Replaced faulty IAC valve |
| 102000 mi US $100 |
Factory all plastic intake manifold was replaced at 100k miles, had no signs of failure, repair was preventative maintenance. |
| 87000 mi US $107 |
Belt tensioner pulley failing; was replaced. |
| 106200 mi US $900 |
Oil gauge showing no oil pressure. Oil pressure sensor/switch replaced. |
1999 Mercury Grand Marquis
Engine not specified
| 74200 mi US $550 |
Bad fuel pump, possibly from sitting too long. |
1999 Mercury Grand Marquis 4-door
8-cylinder automatic 2WD
| 67000 mi US $293 |
loose pulley and worn belt |
1998 Mercury Grand Marquis 4-door
8-cylinder automatic 2WD
| 240000 mi US $1800 |
Replace engine. Apparently a damaged valve. Replacement cheaper than engine repair. |
1997 Mercury Grand Marquis 4-door
8-cylinder automatic 2WD
| 113000 mi US $1500 |
Intake manifold was replaced at this time. The car still had the original all plastic unit which included a plastic coolant crossover which were prone to rupturing as they aged. The intake was replaced with the updated design with an aluminum crossover and is not prone to failure. |
| 201000 mi US $150 |
Replaced hoses. Old hoses did not show signs of wear, but were original and were replaced out of preventive maintenance. Replaced spark plugs at recommended service interval. Replaced serpentine belt, idler pulley, and tensioner pulley. The pulleys seemed to be worn with age and the old belt was showing signs of cracking. |
See TrueDelta's information for all Sedans
See TrueDelta's information for all Mercury models.
