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Infiniti QX4 Throttle Body Replacement at your home or office.

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Throttle Body Replacement Service

How much does a Throttle Body Replacement cost?

On average, the cost for a Infiniti QX4 Throttle Body Replacement is $596 with $428 for parts and $168 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2002 Infiniti QX4V6-3.5LService typeThrottle Body ReplacementEstimate$1072.66Shop/Dealer Price$1295.40 - $1943.76
2003 Infiniti QX4V6-3.5LService typeThrottle Body ReplacementEstimate$1061.13Shop/Dealer Price$1279.80 - $1925.73
2001 Infiniti QX4V6-3.5LService typeThrottle Body ReplacementEstimate$1093.41Shop/Dealer Price$1320.22 - $1990.40
2000 Infiniti QX4V6-3.3LService typeThrottle Body ReplacementEstimate$1772.49Shop/Dealer Price$2175.71 - $3376.61
1998 Infiniti QX4V6-3.3LService typeThrottle Body ReplacementEstimate$1586.79Shop/Dealer Price$1946.68 - $3010.63
1999 Infiniti QX4V6-3.3LService typeThrottle Body ReplacementEstimate$1133.01Shop/Dealer Price$1376.66 - $2098.17
1997 Infiniti QX4V6-3.3LService typeThrottle Body ReplacementEstimate$1586.79Shop/Dealer Price$1943.62 - $3005.27
Show example Infiniti QX4 Throttle Body Replacement prices

What is the throttle body and how does it work?

The throttle body is an air metering device mounted between the air filter and snorkel, and the intake plenum. Within the throttle body is a movable throttle plate whose position controls the amount of air that enters the engine to determine engine speed. Throttle body designs vary. Some incorporate an idle air control valve, throttle position sensor, and other electronic throttle controls. The throttle plate in the throttle body can be controlled directly by an accelerator pedal cable or fully electronically in the newest drive-by-wire systems.

When to consider replacing the throttle body:

  • Check engine light and/or reduced power warning light is on. Most modern throttle bodies have electrical components, such as a throttle position sensor. These components are monitored by the powertrain control module (PCM). If the check engine light or reduced power warning light comes on, a mechanic will determine if any of the stored trouble codes implicate a throttle body malfunction.
  • Wrong idle speed. Carbon deposits in the throttle body, particularly around the movable throttle plate or in the idle air control valve, can cause the engine idle speed to be too low or too high.
  • Poor transmission shifting. In some applications, transmission shift timing relies on signal outputs from the throttle body. If the throttle position sensor is defective, that might adversely affect shift timing and feel.

How do mechanics replace the throttle body?

  • The engine cover is removed, if necessary.
  • The flexible rubber snorkel from the air filter housing to the throttle body is disconnected. Typically, the connection is made with a large stainless steel hose clamp.
  • The electrical connections to the throttle body are removed.
  • If the throttle body is not a drive-by-wire system, the accelerator cable and cruise control cable are disconnected and set aside.
  • The bolts retaining the throttle body to the plenum, the gasket, and the throttle body are removed. If the throttle body is being cleaned and tested for re-use, approved chemicals are used in the cleaning process.
  • The new or serviced throttle body is re-attached to the plenum and the bolts torqued to factory specifications.
  • All cables and electrical connections are restored. The intake air snorkel is reconnected.
  • If applicable, the electronic throttle installation and idle re-learn procedures are performed using an appropriate scan tool.
  • Finally, the engine is started, brought to normal operating temperature, and idle speed is checked. The car is road tested to ensure normal operation and no illumination of warning or service lights.

Is it safe to drive with a throttle body problem?

Yes. But, the vehicle may be limited in power or put into what is referred to as limp mode, in order to get the vehicle to a repair facility. If the check engine light is on, or the electronic throttle control warning light is on, but there is no noticeable difference in engine performance, the car can be safely driven. However, it is best to have it diagnosed and repaired at your earliest convenience to avoid unexpected breakdown or possible damage to the catalytic converter.

When replacing the throttle body keep in mind:

  • Many modern throttle bodies have spring loaded sensors and plastic gears that are not intended to be manipulated directly during any diagnostics or inspections. These components are controlled electronically or generate signals. It is best to let a mechanic use approved tests to diagnose the problem.
  • Wiring faults, bad grounds, or bad terminal connections can make it appear as though an electronically controlled throttle has failed. A mechanic will always rule out all other causes before replacing the throttle body.
  • When cleaning the throttle body, special care should be taken to use only special spray cleaners designed to not damage electrical components or sensors.

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Number of Infiniti QX4 services completed
1804+
services done by our mechanics
TOTAL NUMBER OF EXPERT Infiniti MECHANICS
1000+
experts on our platform
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Meet some of our expert Infiniti mechanics

Real customer reviews from Infiniti owners like you.

Excellent Rating

(164)
Rating Summary
156
2
2
0
4
156
2
2
0
4

John

11 years of experience
94 reviews
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John
11 years of experience
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by Greg
Infiniti QX4 V6-3.5L - Car is overheating - Chula Vista, California
John was on time and very informative & professional. Thank you much!!

Deane

12 years of experience
340 reviews
Request Deane
Deane
12 years of experience
Request Deane
by Larry
Infiniti QX4 V6-3.5L - Oil Change - San Diego, California
Deane was very courteous & neat. He did a great job.

Tinashe

14 years of experience
781 reviews
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Tinashe
14 years of experience
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by Andrew
Infiniti QX4 V6-3.3L - Oil Change - Atlanta, Georgia
On time, friendly and competent

Anderson

28 years of experience
94 reviews
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Anderson
28 years of experience
Request Anderson
by Tyrone
Infiniti QX4 V6-3.3L - Timing Belt - Jamaica, New York
Mr Anderson is a great excellent tech he work neatly take his time work hard and steady too get the job done no breaks or lunch he is dedicated too get the job done 100 percent 1 time and 1st time I would say if u schedule appointment ask for anderson cant speak on any other tech only experience anderson and most importantly he on time thank you Mr Anderson it was nice and a pleasure working with you thank you happy new year

Excellent Rating

(164)
Rating Summary
156
2
2
0
4
156
2
2
0
4
Number of Infiniti QX4 services completed
1804+
services done by our mechanics
TOTAL NUMBER OF EXPERT Infiniti MECHANICS
1000+
experts on our platform
Yourmechanic was featured in

New York Times NBC CBS Forbes INC Tech Crunch

Learn more about us

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