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BMW 745i 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 BMW 745i Throttle Body Replacement is $606 with $466 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2004 BMW 745iV8-4.4LService typeThrottle Body ReplacementEstimate$1087.96Shop/Dealer Price$1327.50 - $2031.95
2003 BMW 745iV8-4.4LService typeThrottle Body ReplacementEstimate$1078.07Shop/Dealer Price$1314.30 - $2015.77
2005 BMW 745iV8-4.4LService typeThrottle Body ReplacementEstimate$1078.07Shop/Dealer Price$1314.34 - $2015.84
2002 BMW 745iV8-4.4LService typeThrottle Body ReplacementEstimate$1078.95Shop/Dealer Price$1315.44 - $2017.60
Show example BMW 745i 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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services done by our mechanics
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Real customer reviews from BMW owners like you.

Excellent Rating

(34)
Rating Summary
30
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0
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3
30
1
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3

Berchel

19 years of experience
101 reviews
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Berchel
19 years of experience
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by Lamont
BMW 745i V8-4.4L - Serpentine/Drive Belt - Gwynn Oak, Maryland
Berchel was on time very informative excellent job I like to keep him as my mechanic if possible.

Art

26 years of experience
88 reviews
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Art
26 years of experience
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by John
BMW 745i V8-4.4L - Oil Change - Kissimmee, Florida
Great service, Art the mechanic arrived on time and was very professional. Did my oil change and diagnostic pretty quickly. This was definitely a great experience by not having to go all the way to a shop and possibly have to rent a car. If you are in a time crunch or just don't want to leave your vehicle at the shop YourMechanic is a great solution.

Patrick

33 years of experience
369 reviews
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Patrick
33 years of experience
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by Francis
BMW 745i V8-4.4L - Water Pump - Las Vegas, Nevada
I tell you if there was a 6 star this is the guy I would rate the 6 stars. Patrick; thank you man! You were exceptional and your character was top notch. You're officially my mechanic anytime I need a car service

Rigoberto

12 years of experience
739 reviews
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Rigoberto
12 years of experience
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by Pili
BMW 745i V8-4.4L - Coolant Reservoir - Chicago, Illinois
Great as always

Excellent Rating

(34)
Rating Summary
30
1
0
0
3
30
1
0
0
3
Number of BMW 745i services completed
374+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1200+
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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