2006 - 2011 BMW Z4 Throttle Body Assembly (OEM)

What to Look For When Buying:

• Proper Fit: Ensure the part is specifically designed for your 2006-2013 BMW model.
• Functionality: Verify that the throttle plate moves smoothly and freely.
• Cleanliness: Check for excessive carbon buildup or other contaminants.
• Complete Assembly: Make sure all necessary components, such as the throttle position sensor (TPS), are included.

Quality Indicators:

What's Typically Included:

• Throttle body housing
• Throttle plate
• Throttle position sensor (TPS)
• Throttle body motor (if applicable)
• Gaskets (sometimes included)

Difficulty Level: Medium

Estimated Time: 1-2 hours

Special Tools Needed:

• Socket set
• Screwdrivers
• Pliers
• Throttle body cleaner (optional)

Critical Steps and Tips:

1. Disconnect the negative battery cable.
2. Remove the air intake duct from the throttle body.
3. Disconnect the electrical connectors from the throttle body.
4. Disconnect any vacuum lines attached to the throttle body.
5. Remove the bolts or nuts securing the throttle body to the intake manifold.
6. Carefully remove the old throttle body.
7. Clean the mating surfaces on the intake manifold.
8. Install the new throttle body, using a new gasket if provided.
9. Reconnect the vacuum lines and electrical connectors.

DIY or Professional Installation:

• DIY is possible for mechanically inclined individuals.
• Professional installation is recommended if you are not comfortable working on your car's engine.

Used OEM:

• Genuine factory parts, ensuring proper fit and function.
• Tested and inspected to meet quality standards.
• Significantly lower prices compared to new parts.
• A great value for a reliable replacement.

Refurbished OEM:

• Original factory parts that have been professionally restored.
• Worn or damaged components are replaced with new ones.
• Offers a balance of quality and affordability.
• A good choice for those seeking a reliable part with a warranty.

New Aftermarket:

• Brand new parts manufactured by third-party companies.
• Built to meet or exceed OE specifications.
• Price can vary depending on the manufacturer and quality.
• A viable option for those seeking a new part at a competitive price.

Parts Commonly Replaced or Checked:

• Intake manifold gasket
• Air intake hose
• Mass air flow (MAF) sensor
• Idle air control (IAC) valve (if applicable)
• Vacuum lines

Why Replacing Related Parts Prevents Repeat Failures:

• Replacing worn or damaged related parts can prevent future problems with the throttle body assembly.
• A faulty intake manifold gasket can cause vacuum leaks, leading to poor engine performance.
• A clogged air filter can restrict airflow, putting stress on the throttle body.
• Replacing these parts together can ensure optimal engine performance and prevent repeat failures.

How Long This Part Normally Lasts:

• A throttle body assembly can typically last for 75,000 to 150,000 miles or more.

Factors That Affect Longevity:

• Driving conditions (e.g., stop-and-go traffic)
• Maintenance habits (e.g., regular cleaning)
• Quality of the replacement part
• Environmental factors (e.g., extreme temperatures)

Used OEM: $50 - $150

Refurbished OEM: $100 - $250

New Aftermarket: $80 - $300

Labor Cost Considerations:

• Labor costs for throttle body replacement can range from $100 to $300, depending on the shop and location.

Total Job Cost Estimates:

• Used OEM: $150 - $450
• Refurbished OEM: $200 - $550
• New Aftermarket: $180 - $600

Known Issues:

• Carbon buildup in the throttle body is a common issue for 2006-2013 BMW models.
• Some models may experience issues with the throttle position sensor (TPS).

TSBs or Common Complaints:

• Check for any Technical Service Bulletins (TSBs) related to the throttle body on your specific BMW model.
• Online forums and communities can provide valuable information about common complaints and solutions.

How to Confirm Proper Operation:

• Start the engine and let it idle.
• Check for smooth idling and proper throttle response.
• Monitor the engine for any unusual noises or vibrations.
• Use an OBD-II scanner to check for any new Diagnostic Trouble Codes (DTCs).

What to Look/Listen For:

• Smooth and consistent idle speed
• Responsive throttle acceleration
• No hesitation or stalling
• No unusual noises from the engine

Q: How do I know if my throttle body is bad?
A: Common signs include rough idling, stalling, hesitation during acceleration, and a Check Engine Light.

Q: Can I clean my throttle body instead of replacing it?
A: Yes, cleaning the throttle body can sometimes resolve issues caused by carbon buildup. However, if the throttle position sensor or motor is faulty, replacement is necessary.

Q: Is it difficult to replace a throttle body myself?
A: It's a medium-level DIY job. If you're comfortable with basic car repairs and have the necessary tools, you can likely do it yourself. Otherwise, professional installation is recommended.

Q: Will a new throttle body improve my gas mileage?
A: If a faulty throttle body was causing poor engine performance, replacing it can improve fuel economy.

Q: Do I need to reprogram my car after replacing the throttle body?
A: Some BMW models may require a throttle body adaptation procedure after replacement. Consult your vehicle's repair manual or a qualified technician for specific instructions.

OEM Part Numbers:

• BMW: 13547516946, 13547556118, 7516946, 7556118
• VDO: 408238420001Z

Fits Years: 2006 2007 2008 2009 2010 2011