OEM Throttle Body Assembly for 2007-2013 BMW

Buying a replacement throttle body assembly? Here's what to look for:

• Things to Look For:
• Proper fitment for your specific BMW model and year.
• Cleanliness and overall condition (especially for used parts).
• Functionality of the throttle position sensor (TPS).
• Smooth movement of the throttle plate.

• Quality Indicators:
• For used OEM parts, look for parts that have been tested and inspected.
• For refurbished OEM parts, check if the part has been professionally restored and comes with a warranty.
• For new aftermarket parts, research the brand reputation and read reviews.

• What's Included:
• The throttle body assembly itself.
• Sometimes a new throttle body gasket is included, but it's a good idea to purchase one separately if needed.
• Check if any sensors are included (some may need to be transferred from your old throttle body).

Replacing the throttle body assembly is a task that can be done at home by some, but others may prefer professional help.

• Difficulty & Time:
• Difficulty: Intermediate
• Estimated Time: 1-2 hours

• Special Tools:
• Basic hand tools (sockets, wrenches, screwdrivers)
• Throttle body cleaner
• OBD-II scanner (to clear trouble codes)
• Torque wrench

• Critical Steps & Tips:

1. Disconnect the negative battery cable.
2. Remove the air intake duct.
3. Disconnect the electrical connector from the throttle body.
4. Remove the throttle body mounting bolts.
5. Remove the old throttle body and clean the mounting surface.
6. Install the new throttle body with a new gasket.
7. Reconnect the electrical connector and air intake duct.
8. Reconnect the negative battery cable.
9. Clear any trouble codes with an OBD-II scanner.

• DIY or Professional?
• DIY is possible for mechanically inclined individuals with experience working on cars.
• If you are not comfortable working on your car's engine, professional installation is recommended.

Choosing the right throttle body assembly depends on your budget and needs. Here's a breakdown of your options:

• Used OEM:
• Best value option.
• Genuine factory parts from BMW.
• Tested and inspected to ensure proper function.
• Significantly lower price than new.

• Refurbished OEM:
• Factory parts that have been professionally restored.
• Often include new components like sensors or gaskets.
• A good balance of price and reliability.

• New Aftermarket:
• Brand new parts manufactured by third-party companies.
• Built to meet or exceed OE specifications.
• Can be a cost-effective alternative to OEM parts.

When replacing the throttle body assembly, consider these related parts:

• Parts to Replace/Check:
• Throttle body gasket: Ensures a proper seal between the throttle body and intake manifold.
• Air intake hose: Check for cracks or leaks that can affect airflow.
• Mass airflow (MAF) sensor: Clean or replace if it's dirty or malfunctioning.
• Idle air control (IAC) valve (if applicable): Some models have a separate IAC valve that controls idle speed.

• Preventing Repeat Failures:
• Replacing these parts can prevent future problems and ensure optimal engine performance. A faulty MAF sensor, for example, can cause the new throttle body to become dirty quickly.

How long should your throttle body assembly last?

• Normal Lifespan:
• Typically 75,000 - 150,000 miles.

• Factors Affecting Longevity:
• Driving conditions (stop-and-go traffic vs. highway driving).
• Regular maintenance (air filter replacement).
• Quality of fuel used.
• Engine condition.

Here's what you can expect to pay for a throttle body assembly:

• Budget: Used OEM - $75 - $150
• Mid-Range: Refurbished OEM - $150 - $300
• Premium: New Aftermarket - $200 - $400

• Labor Costs:
• Professional installation typically costs $100 - $300, depending on the shop's labor rate.

• Total Job Cost:
• DIY: $75 - $400 (depending on the part chosen)
• Professional Installation: $175 - $700 (including parts and labor)

Specific to your BMW model:

• The N52 engine in these BMWs is known for carbon buildup on the intake valves, which can contribute to throttle body issues.
• Some owners have reported issues with the throttle body connector becoming loose or corroded.
• There are no major TSBs (Technical Service Bulletins) specifically related to the throttle body assembly on these models, but checking for any engine performance related TSBs is always a good idea.

After installing the new throttle body assembly:

• Confirming Proper Operation:
• Start the engine and let it idle.
• Check for smooth idling and throttle response.
• Use an OBD-II scanner to check for any new trouble codes.

• What to Look/Listen For:
• No stalling or hesitation.
• Smooth acceleration.
• Normal engine sound.
• No check engine light.

Here are some frequently asked questions about throttle body assemblies:

• Q: Will a new throttle body improve my gas mileage?
• A: If your old throttle body was dirty or malfunctioning, a new one can improve gas mileage by restoring proper airflow.

• Q: Do I need to get the new throttle body programmed?
• A: In most cases, no. These throttle bodies are typically plug-and-play. However, clearing the adaptations in the ECU with a scan tool after installation is recommended for optimal performance.

• Q: How often should I clean my throttle body?
• A: Cleaning every 30,000 miles is a good preventative measure.

• Q: Can a bad throttle body cause my car to fail an emissions test?
• A: Yes, if the throttle body is causing the engine to run improperly, it can lead to higher emissions and a failed test.

• Q: What does the throttle body do?
• A: The throttle body controls the amount of air that enters the engine, which is essential for proper combustion and engine performance.

OEM Part Numbers:

• BMW: 13547556118, 13547597881
• Continental/VDO: 408242022008Z

Fits Years: 2007 2008 2009 2010 2011 2012 2013