| 1 | 0 | 3 | 4 | 3 | 4 |
Infiniti QX4 repairs by problem area
Engine (45%)
Transmission and Drivetrain (7%)
Brakes and Traction Control (5%)
Suspension and Steering (22%)
Electrical and Air Conditioning (16%)
Paint, Rust, Leaks, Rattles, and Trim (1%)
Other (3%)
Chart based on 148 repairs.
Infiniti QX4 engine repair cost distribution
$2500+ (4%)
$1000 - $2499 (21%)
$500 - $999 (23%)
$100 - $499 (35%)
< $100 (18%)
Chart based on 57 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2003 Infiniti QX4 4dr SUV
240-horsepower 3.5L V6 4-speed automatic RWD
| 168000 mi | Hard to start and rough idle after starting. Combination of idle air control valve and throttle position sensor problems. |
| 178000 mi | Fuel/Air control hard failure. |
| 100000 mi US $487 |
Replaced oxygen sensor |
| 168000 mi US $50 |
leaking valve cover gaskets |
| 175000 mi US $200 |
fuel pump replacement |
2003 Infiniti QX4 4dr SUV
240-horsepower 3.5L V6 4-speed automatic 4WD w/low range
| 110980 mi C $1400 |
O2 sensor exhaust |
| 91140 mi C $89 |
Exhaust |
| 55000 mi US $350 |
Reseal front exhaust tubes. |
| 115700 mi | Check engine light is always lit due to pressure problem in the gas tank. |
| 129000 mi US $700 |
leak in evaporator cap |
| 206000 mi US $1000 |
Can't find reason for over heating. Replaced, water pump, radiator, front and rear thermostats,hoses, antifreeze: All twice. The only thing I can think of are the CATS. |
| 206000 mi US $600 |
Love the vehicle, but no one can find why it's overheating, so it sits in my driveway. |
| 70000 mi US $550 |
Replaced cracked header and other exhaust pieces |
| 76000 mi US $200 |
Broken Exhaust bracket and broken heat shields |
| 110500 mi US $1 |
02 bank 2 sensor. known issue. software bug, computer checks sensor too early in start up procedure. sensor actually fine. not willing to pay dealer to fix. |
| 74000 mi US $175 |
exhaust pipe leak |
2002 Infiniti QX4 4dr SUV
240-horsepower 3.5L V6 4-speed automatic RWD
| 110000 mi US $3000 |
02 and Camrod sensors |
| 195000 mi US $960 |
Driver side catalytic converter |
2002 Infiniti QX4 4dr SUV
240-horsepower 3.5L V6 4-speed automatic 4WD w/low range
| 88700 mi US $150 |
bad 02 sensor - was replaced |
| 145000 mi US $200 |
cooling system... The engine continues to over heat. Problem not fixed. |
2001 Infiniti QX4
Engine not specified
| 247380 mi ¤1000 |
This car is falling apart but is still going, although very slowly. Had to replace radiator, a few pipes, filters but it’s getting expensive to keep this car running. It guzzles too much gas and hardly can accelerate. Needs a new engine, maybe. |
2001 Infiniti QX4 4dr SUV
240-horsepower 3.5L V6 4-speed automatic 4WD w/low range
| 60000 mi US $1100 |
Erratic engine ignition: misfiring Erratic engine ignition: misfiring |
| 67000 mi US $120 |
Code 1140 & 1145 crankshaft timing sensors, both replaced by owner and cleared codes with new code reader.PEEEERFECT!!! |
| 82000 mi US $300 |
code p0174-replaced maf sensor |
| 88000 mi US $285 |
muffler replaced |
| 103000 mi US $125 |
Replaced 2 belts as worn out finally. |
| 93200 mi US $1500 |
Coil packs replaced on all cylinders, also fuel mixing sensor replaced. |
| 125000 mi US $5000 |
Engine is just screwed up. Couldn't find the problem. |
| 167000 mi | Loose belts - belts in good condition, just needed re-tightening |
| 114000 mi US $100 |
Heat shield had to be removed. Consistent noise. Had it done twice. Second time successful. Also I needed new tires asap. 200 a piece. Rear muffler had to be replaced. Also a repair was done for Infinity qx4 due to recall. |
| 128000 mi | The check engine light was on so I took it to a mechanic thinking it could be my tranmision. They kept the car for two days and checked everything in dealing with the engine and stated that they could not find anything wrong with the car. |
| 140000 mi US $1400 |
Replaced pipe in the back. Still need more work done. Some times car may be hesitant in the mornings. I will fix that as well. I am looking to replace car/keep and for winter driving. |
| 142500 mi US $600 |
I was told by 2 mechanics that I may need a transmission so I took it to the dealer for a third opinion. Replaced both front 02 sensors and rechecked, checked fuel system lean B1 and front 02 sensors were not working off idle and was slow. |
| 138000 mi US $1000 |
Fixed 2 codes. TSB. Replaced vehicle Canister, has a crack in it. |
| 134000 mi US $168 |
Rusted fuel filler tube to fuel tank, dealer had said they had replaced under recall 2 years ago, but they lied and I had to do it myself when they refused to do again because their records "said they already did it once under warranty "ha! |
| 95480 mi C $150 |
exhaust flex pipe was leaking |
| 101680 mi C $500 |
MASS AIR FLOW FAILURE |
2001 Infiniti QX4 4-door
6-cylinder automatic 4WD
| 146000 mi US $300 |
SUV was stalling during long trips in hot weather. Very intermittant - once every couple of weeks and unable to reproduce at dealers shop every time it was brought in. |
| 146000 mi US $1550 |
The intermittant starting/stalling become more consistent and eventually all the time. The problem was a leak in the cooling lines of the throttle body. However, the repair affected the engine computer, which needed to be replaced (with used one). |
2000 Infiniti QX4 4dr SUV
170-horsepower 3.3L V6 4-speed automatic 4WD w/low range
| 167400 mi C $240 |
Wiring problem with knock sensor. Was wirerd wrong from timing belt change. |
| 161000 mi US $58 |
exhaust system developed a leak behind CAT. Had muffler place weld a piece to fix it instead of replacing parts. |
| 171000 mi US $850 |
Car stalled. Goodyear replaced both O2 sensors then did a major tune-up. Car still ran rough, we are living with it. |
| 103000 mi US $1100 |
Intake manifold gasket, hoses. Distributor replaced; new distributor died after 300 miles; replaced again. |
| 134000 mi US $475 |
The distributor malfunctioned when the engine was warm. |
| 204000 mi US $1100 |
Bad coil (I think?) in electronic distributor required replacement of complete distributor |
| 205000 mi US $600 |
Replaced harmonic balance pulley. |
| 225700 mi US $385 |
Ignition core replaced - included new ignition keys and a valet key. |
1999.5 Infiniti QX4
Engine not specified
| 185700 mi US $600 |
EVAP volume control valve failure. Code P1440. Replace valve cover gaskets. Repair rear gate glass hinge. |
1998.5 Infiniti QX4
Engine not specified
| 245000 mi US $390 |
Radiator had a pinhole leak, the fluid reservoir tank had a crack, and the thermostat was stuck open |
1998 Infiniti QX4
Engine not specified
| 187000 mi US $2100 |
Valve cover gaskets leaking oil. |
1998 Infiniti QX4 4-door
6-cylinder automatic 4WD
| 191000 mi US $1535 |
front and rear mufflers rusted; both replaced |
| 207400 mi US $600 |
Upper radiator housing broke |
| 217200 mi US $900 |
O2 sensors |
1997 Infiniti QX4 4-door
6-cylinder automatic 4WD
| 139500 mi | I had the stock exhaust, which was a bit rotted from midwest salt, replaced from the cat back with a flowmaster muffler and plain pipe. |
| 142000 mi US $700 |
Timing belt tensioner pulley sqeaked when cold. Replaced pulley along with water pump, belts inside and out. |
| 163000 mi US $400 |
Water pump failed |
| 224200 mi US $175 |
Hairline crack in radiator for last 4 months. Tried sealing with JB weld several times, but it only worked for a week or so each time. Slow water release over 10-14 days. Finally ordered and installed new radiator. Oil leak from left valve cover. Replaced left valve cover gasket. |
| 245000 mi | Coolant leaking into passenger compartment. Problem diagnosed as cracked heater core. After examining options (replacement) decided to bypass heater core by connecting intake and outtake lines together, resulting in NO HEATING CAPABILITY. |
| 145000 mi US $725 |
Water pump that was replaced at timing belt service interval started leaking and needed to be replaced after 30K miles. |
| 157000 mi | Valve Cover Gaskets |
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