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

CarServiceEstimateShop/Dealer Price
2003 BMW 745LiV8-4.4LService typeThrottle Body ReplacementEstimate$1087.96Shop/Dealer Price$1327.50 - $2031.95
2005 BMW 745LiV8-4.4LService typeThrottle Body ReplacementEstimate$1078.07Shop/Dealer Price$1314.30 - $2015.77
2004 BMW 745LiV8-4.4LService typeThrottle Body ReplacementEstimate$1078.07Shop/Dealer Price$1314.34 - $2015.84
2002 BMW 745LiV8-4.4LService typeThrottle Body ReplacementEstimate$1078.95Shop/Dealer Price$1315.44 - $2017.60
Show example BMW 745Li 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 BMW 745Li services completed
418+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1200+
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Real customer reviews from BMW owners like you.

Excellent Rating

(38)
Rating Summary
37
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1
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37
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1
0

Tyrone

20 years of experience
105 reviews
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Tyrone
20 years of experience
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by Kimberly
BMW 745Li V8-4.4L - Car is not starting - Houston, Texas
Very nice, explained everything I needed for my vehicle. I will definitely use this service again!

Damian

12 years of experience
465 reviews
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Damian
12 years of experience
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by Annette
BMW 745Li V8-4.4L - Oil Change - Clinton, Maryland
GREAT!!!!

Peter

44 years of experience
1397 reviews
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Peter
44 years of experience
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by LINDA
BMW 745Li V8-4.4L - Car idle is rough - Paradise Valley, Arizona
Peter was a perfect mechanic. He knew exactly what the issue was in my car. thank YOU!!!!!!!!!!!!!!!!

Michael

17 years of experience
606 reviews
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Michael
17 years of experience
Request Michael
by Arther
BMW 745Li V8-4.4L - Car starts and then dies - Smyrna, Georgia
If I could give Michael 10 stars I would. Michael started off by contacting me the morning of my appointment to get a full understanding of what was going on. This made me feel as he wanted to be prepared for the job. My BMW was not starting and as soon as he got there he started it and already had an idea of what was going on, but he didn’t stop there he inspected my car and gave me a full report and more advice than the BMW shop I took it to months ago. He was very knowledgeable and answered all my questions. He did not rush or try to push unnecessary sevices on me. He explained what I needed, why I needed it and when I should get it done by. This is the kind of mechanic you want working on your car and I have a BMW 745Li and we all know the issues these cars can have. He will definitely be getting my business.

Excellent Rating

(38)
Rating Summary
37
0
0
1
0
37
0
0
1
0
Number of BMW 745Li services completed
418+
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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