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If your Buick LaCrosse is showing uneven idle or hesitant acceleration, the throttle body is a common place to look. Choosing the right throttle body matters because it directly affects airflow metering, engine idle stability, and throttle responsiveness, all of which influence drivability and fuel efficiency. This guide highlights the shortlisted top picks for Buick LaCrosse throttle bodies, chosen for fitting accuracy, airflow performance, and durability. Below we explain the evaluation criteria used and what to watch for when swapping or servicing this component.
Looking for other parts? See all Buick LaCrosse parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Magorfas Electronic Throttle Body (Replacement for 12670834) |  |
| Most Popular A crowd favorite that many people choose with confidence | TUCAREST Fuel Injection Electronic Throttle Body Assembly (TB1034) |  |
| Best Quality Built to a higher standard if you want something more solid | A-Premium Electronic Throttle Body for Buick LaCrosse 2010 3.0L |  |
| Best Budget The cheapest option that still gets the job done reliably | Youxmoto Electronic Throttle Body for 3.6L GM Vehicles (Replacement for 12616995) |  |
| Most Sold A high-volume bestseller chosen again and again | VANBOL Electronic Throttle Body Assembly with IAC and TPS (fits Buick LaCrosse V6 3.6L) |  |
| Best Value for Money The sweet spot between price and what you get | WMPHE Electronic Throttle Body Assembly (replacement) |  |
| Best Overall The best all-around choice for most situations | IRONTREE S20219 Electronic Throttle Body for Chevy/Buick 3.0L–3.6L V6 |  |
1. Magorfas Electronic Throttle Body (Replacement for 12670834)
| Manufacturer | Magorfas |
|---|---|
| Manufacturer Part Number | MFTBY010LX |
| Connector | 6-pin |
| Compatible engine | 2.4L |
| Replacement for | 12670834 |
This Magorfas electronic throttle body replaces the factory unit and restores electronic control of intake airflow for compatible 2.4L GM cars such as the Buick LaCrosse. It is a 6-pin, aluminum throttle body intended to operate in high-temperature engine environments and is used the same way a dealer part would be—remove the old unit, fit the connector and bolts, initialize the unit per the vehicle procedure, then confirm proper idle and throttle response. Notable features include a factory-style electrical connector and an aluminum housing that resists heat and corrosion. In practice this means a robust, long-lasting replacement that customers report fits and functions like the original on multiple models. Limitations are that the unit requires the vehicle initialization sequence after install and that occasional sensor calibration or related component issues can affect throttle position readings; buyers should be prepared to clear codes or verify related sensors if problems persist. This is a practical, reliability-oriented replacement for drivers who want a near-factory repair without dealer parts pricing.
Best for: Reliability-focused buyers who prioritize a durable, factory-replacement style part to return throttle function to a Buick LaCrosse with minimal fuss.
Less Ideal for: Buyers seeking an upgraded performance throttle or a plug-and-play unit that requires no post-install setup should look elsewhere.
- Designed as a direct replacement for the compatible GM 2.4L throttle bodies, easing installation
- Aluminum housing offers heat and corrosion resistance for extended service life
- Factory-style 6-pin connector and fitment reported to match OEM locations
- Multiple user reports indicate consistent fit and restored throttle control
- Requires proper initialization procedure after installation to self-learn position
- May still need related sensor checks or ECU code clearing if previous faults remain
Verdict A durable, factory-style replacement throttle body that restores reliable throttle control on 2.4L Buick LaCrosse models when installed and initialized correctly.
2. TUCAREST Fuel Injection Electronic Throttle Body Assembly (TB1034)
| Compatible engine | V6 3.6L (3564cc) 217CID |
|---|---|
| Connector | 6 Pin Male |
| Inside diameter | 2-13/16 In. (72 mm) |
This TUCAREST TB1034 is a replacement electronic throttle body assembled and calibrated to match factory output voltages for the V6 3.6L engines used in certain Buick LaCrosse model years. It installs in place of the factory unit to control airflow via the throttle plate and uses pre-assembled sensors and actuator motor to simplify installation. For a LaCrosse, the practical benefit is an affordable, ready-to-fit part that can cure rough or fluctuating idle and restore normal throttle response when the original unit fails. Many buyers report straightforward installs, but the vehicle computer usually requires a throttle relearn using a scan tool or the manufacturer procedure to prevent fluctuating idle or a persistent check engine light. Build quality is mixed across reports: several users found it worked like a factory replacement while a minority experienced early failure or connector fit issues. Because relearn and electrical fitment are important, expect to follow a proper relearn procedure or have a technician complete installation to avoid drivability symptoms.
Best for: Convenience-driven buyers who want an affordable, ready-to-install throttle body to get their Buick LaCrosse back on the road with minimal parts prep and fewer calibration steps handled by the supplier.
Less Ideal for: Drivers who prefer dealer-sourced factory units for long-term reliability or those unwilling to perform or pay for the required throttle relearn and diagnostic verification should consider alternatives.
- Pre-calibrated and assembled with throttle actuator and sensors to reduce bench work before install
- Built to match factory fit and function for specified V6 3.6L applications
- Cost-effective replacement compared with dealer units
- Aluminum housing and upgraded internal components aimed at improved durability
- Some buyers reported defective units or early failure in a minority of cases
- Requires proper throttle relearn procedure with a scan tool or technician after installation
- Plug/connector engagement can be tight and may need care during installation
Verdict A budget-friendly, pre-assembled throttle body that can restore driveability on the LaCrosse if installed correctly and properly relearned, but occasional quality and fit issues mean a cautious approach is wise.
3. A-Premium Electronic Throttle Body for Buick LaCrosse 2010 3.0L
| Mounting Type | Flange Mount |
|---|---|
| Output Type | Push-Pull |
| Specific Uses For Product | automotive |
| Material Type | Aluminum |
| Terminal Count | 6 |
This electronic throttle body replaces the factory unit on the 2010 Buick LaCrosse 3.0L and restores electronic throttle control when the original part has failed or developed faulty throttle position readings. It mounts as a flange unit and connects with the vehicle's six‑terminal blade connector, and the built‑in throttle position sensor means the ECU can read position without adding external sensors. In practice it is used as a straightforward bolt‑on replacement during routine repair or preventive maintenance; many users report simple installation and a quick relearn procedure to clear drivability faults. The aluminum housing and included gaskets support a durable fit, but a few reports note surface finish and occasional programming or cold‑weather issues on some vehicles, so expect to verify proper adaptation and diagnostic compatibility after installation. For drivers aiming to recover sharp pedal response and eliminate throttle‑related trouble codes, this provides OEM‑style function at a lower cost, though results depend on correct vehicle programming and installation care.
Best for: Performance-oriented owners focused on restoring crisp throttle response and eliminating throttle‑position faults on a Buick LaCrosse 2010 3.0L who prioritize drivability and responsiveness.
Less Ideal for: Owners who prefer dealer service with guaranteed factory programming or those unwilling to perform post‑installation relearn and diagnostic checks should consider having installation handled by a professional technician.
- Direct replacement fitment for the 2010 Buick LaCrosse 3.0L so no major modifications required
- Integrated throttle position sensor lets the vehicle read position without extra parts
- Aluminum housing with included gaskets for a durable seal and straightforward mounting
- Many buyers report resolving throttle-related codes and improved pedal response after installation
- Some units have needed programming or adaptation to the vehicle and may not work out of the box in every case
- A few reports indicate inconsistent behavior in very cold conditions
Verdict A cost-effective, factory‑replacement electronic throttle body that restores throttle control and pedal response on the 2010 Buick LaCrosse 3.0L when properly installed and adapted.
4. Youxmoto Electronic Throttle Body for 3.6L GM Vehicles (Replacement for 12616995)
| Mounting Type | Flange Mount |
|---|---|
| Output Type | electrical signal |
| Material Type | Aluminum |
This Youxmoto electronic throttle body is a direct replacement-style unit designed for GM 3.6L applications including Buick LaCrosse model years listed by the manufacturer. It mounts using a flange and provides an electrical signal output to the vehicle control system, so installation is similar to swapping a factory throttle body and reconnecting the electrical harness. The unit is aluminum, which helps resist corrosion and keeps long-term wear reasonable for a low-cost part. A built-in throttle self-learning procedure is noted, which means the vehicle may need a simple relearn sequence after installation to restore idle and throttle response. The practical benefit is an affordable way to restore proper throttle control and clear driveability issues without paying dealer rates. Expect basic functionality suitable for routine repairs rather than performance gains, and confirm part number fitment before purchase because compatibility is limited to specific 3.6L GM models and years.
Best for: Practical, budget-conscious owners seeking an affordable factory-style replacement for a failing throttle body on a Buick LaCrosse who prioritize cost-effective repairs over upgraded performance.
Less Ideal for: Drivers looking for performance enhancements or long-term OEM-equivalent coverage should consider higher-end remanufactured or factory parts and professional installation options.
- Aluminum construction offers corrosion resistance and reasonable durability for a replacement part
- Flange mount and electrical signal output match factory-style installation for straightforward swap-in
- Includes documented throttle self-learning procedure to restore proper idle and throttle response
- Budget-friendly option that can fix driveability issues without dealer labor costs
- Fitment is limited to specific 3.6L GM models and years so careful part-number verification is required
- Not intended to improve performance beyond factory specifications
Verdict A cost-effective aluminum replacement throttle body that restores factory-style throttle control on compatible Buick LaCrosse 3.6L vehicles if you verify part fitment first.
5. VANBOL Electronic Throttle Body Assembly with IAC and TPS (fits Buick LaCrosse V6 3.6L)
| Output Type | electrical signal |
|---|---|
| Material Type | Aluminum |
| Included Components | Throttle Body with IAC and TPS Throttle Position Sensor with 6 Pin |
This VANBOL throttle body assembly is a full replacement unit that provides electronic throttle control, built-in idle air control (IAC), and a 6-pin throttle position sensor (TPS) for Buick LaCrosse V6 3.6L models. It is typically used to restore throttle response and idle stability when the factory throttle body is worn or malfunctioning. The unit is cast from aluminum and claims high-temperature resistant seals to maintain a tight intake connection and reliable operation. Installation is intended as bolt-on with no modifications and the package includes installation instructions. In practice this part should return factory-like throttle behavior and improved acceleration feel compared with a failing unit, and the integrated sensors reduce the need to source separate components. Limitations to keep in mind are that this is an aftermarket part so fit and calibration can vary between vehicles and a professional or cautious DIYer should verify part numbers and follow a proper relearn or scan-tool procedure after fitment. A one-year warranty is provided for peace of mind.
Best for: A risk-averse mainstream buyer who wants a straightforward replacement to restore throttle response and idle stability on a Buick LaCrosse V6 3.6L without hunting down separate sensors.
Less Ideal for: Drivers seeking an exact factory-sourced part or those who prefer plug-and-play guaranteed calibration from a dealer should consider OEM factory-quality alternatives.
- Complete assembly with IAC and 6-pin TPS reduces parts sourcing and simplifies replacement
- Aluminum construction and high-temperature seals aimed at durability and stable fitment
- Sold as a direct-fit for Buick LaCrosse V6 3.6L which simplifies installation
- Includes installation instructions and a one-year warranty for added assurance
- Aftermarket unit may require throttle relearn or diagnostics to clear codes after installation
- Fit and calibrations can vary slightly versus factory parts which could need professional verification
Verdict A complete aftermarket throttle body to restore throttle control on Buick LaCrosse V6 3.6L with integrated sensors and a one-year warranty, though a relearn or professional check may be required after installation.
6. WMPHE Electronic Throttle Body Assembly (replacement)
| Connector/Terminal Type | Blade, 6 pins |
|---|---|
| Actuation Type | Electric |
| Material | Aluminum, steel, plastic |
| Compatible Engines | 3.0L and 3.6L V6 (listed GM fitments) |
This WMPHE electronic throttle body is a direct-replacement assembly intended to fix throttle-related faults such as unstable idle, hesitation, limp mode, and throttle warning lights on compatible GM 3.0L and 3.6L V6 vehicles including the Buick LaCrosse. It installs in place of the factory throttle body and uses a 6-pin blade connector and electric actuation to report throttle position to the engine control system. In practice it is used when the original unit fails or when throttle position readings are erratic; replacing the assembly restores accurate air control and typically smooths acceleration and idle. The unit is aluminum-bodied for corrosion and heat resistance and lists multiple OEM part numbers for fitment. Buyers should plan for a professional install or proper relearn procedure after fitting because some vehicles require throttle adaptation to clear codes and stabilize idle. While many owners report reliable repairs and cost savings versus dealer parts, occasional reports note relearn or calibration issues on certain cars, so expect to verify fit and perform the vehicle-specific reset steps after installation.
Best for: A practical optimizer who wants a cost-effective, factory-replacement throttle body to restore drivability on a Buick LaCrosse without paying dealer prices, prioritizing value and functional reliability.
Less Ideal for: Drivers seeking a plug-and-play guaranteed calibration-free part or those unwilling to perform or pay for vehicle-specific relearn procedures should consider dealer parts or professional service instead.
- Direct-replacement design that matches multiple GM part numbers for Buick LaCrosse fitment.
- Aluminum construction offers better heat and corrosion resistance than cheaper plastics.
- Electric actuation with a throttle position sensor restores accurate engine air control and responsiveness.
- Reported consistent fixes for limp mode, throttle warning lights, and hesitation in many user installations.
- May require a professional installation and throttle relearn or calibration on some vehicles.
- Not guaranteed to complete the vehicle relearn process on every LaCrosse without diagnostic tooling or ECU reset.
Verdict A budget-friendly, factory-style replacement that restores throttle function on Buick LaCrosse models when installed and properly relearned, but plan for calibration steps after fitting.
7. IRONTREE S20219 Electronic Throttle Body for Chevy/Buick 3.0L–3.6L V6
| Compatible engine sizes | 3.0L, 3.6L V6 |
|---|---|
| Mounting type | Flange Mount |
| Output type | Push-Pull |
| Upper temperature rating | 250 Degrees Fahrenheit |
This IRONTREE throttle body is a ready-to-install electronic unit that replaces the factory throttle assembly on compatible 3.0L and 3.6L V6 GM engines used in the Buick LaCrosse. It arrives pre-assembled with the actuator, throttle position sensor and idle control components, so you plug it into the factory wiring harness and reattach the intake with no adapters. The unit is built to meet OEM specifications and the manufacturer says each part is computer-tested to verify operation before shipping. For real-world repair work this means a straightforward swap for owners looking to clear drivability issues like rough idle, limp-home mode, or throttle hesitation without paying dealer labor. Some buyers report long-term reliability, but a subset of reviews mention fitment errors and early failures, so careful verification of application and inspection on receipt are advisable. Installation is generally quick for anyone with basic mechanical skills, but shops can still be needed if calibration or diagnostics are required after installation.
Best for: Buyers seeking a balanced, value-conscious replacement that restores drivability on a Buick LaCrosse without paying dealer markup and who prioritize straightforward repairs and reliable day-to-day performance.
Less Ideal for: Those who want guaranteed dealership-level longevity or a factory-original part with full brand-specific support should consider sourcing a factory replacement from the dealer or an authorized supplier.
- Direct replacement design with pre-installed actuator and sensors for simple plug-and-play installation
- Built and tested to meet factory-spec performance for accurate airflow and throttle response
- Covers common GM 3.0L and 3.6L V6 applications used in the Buick LaCrosse, simplifying part selection
- Lower-cost alternative to dealer parts with similar form and function
- Some buyers report inconsistent fitment or early failure in certain vehicles
- Not all units arrive as new stock according to user reports, so inspection on delivery is necessary
Verdict A practical, lower-cost direct-replacement throttle body for the Buick LaCrosse that restores throttle control quickly, provided you confirm fitment and inspect the unit on arrival.
Choosing the Right Buick LaCrosse Throttle Body: Key Factors to Consider
Fitment and Mounting Alignment
Correct physical fit matters because improper alignment can cause air leaks, poor sealing, or stress on the throttle linkage. Verify bolt pattern, flange shape, and throttle cable or electronic connector position to ensure the unit mates cleanly to the intake manifold.
A throttle body that matches the vehicle’s mounting geometry reduces the need for modification and helps preserve intake tract sealing, which is important for maintaining consistent air metering and preventing vacuum leaks that affect idle and performance.
Sensor Compatibility
Modern throttle bodies integrate sensors such as the throttle position sensor and sometimes an idle air control function. Ensuring electrical connector type and sensor output are compatible with the vehicle prevents check-engine lights and maintains correct engine management.
Mismatched sensors can require additional harness adapters or recalibration, so look for units that match the original sensor specifications or explicitly state compatibility with the Buick LaCrosse model year you are servicing.
Airflow Characteristics and Bore Size
The throttle bore diameter and the butterfly geometry determine how air flows into the engine at different throttle positions. Correct airflow characteristics help preserve throttle response and ensure smooth transitions between idle and open throttle.
A unit with restrictive or overly aggressive bore sizing can lead to throttle lag, uneven fueling, or drivability issues. Choose a throttle body that maintains the intended airflow profile for the engine to keep fueling and emissions control predictable.
Material Quality and Corrosion Resistance
Throttle bodies operate in a hot, variable environment and are exposed to intake contaminants. Materials that resist corrosion and withstand thermal cycling will last longer and retain tolerances that affect sealing and sensor operation.
Aluminum or appropriately coated components are common; attention to finish quality around the butterfly and bore can reduce buildup and wear. Durable materials also reduce the likelihood of warping or gasket failure over time.
Serviceability and Cleaning Access
Many throttle-related issues can be resolved by cleaning carbon buildup from the bore and butterfly. A design that allows access to the throttle bore without extensive disassembly makes routine maintenance easier and reduces labor time.
Consider whether the unit permits safe cleaning without damaging sensors or coatings, and whether replacement parts such as gaskets or rebuild components are available to extend service life.
Calibration and Relearn Requirements
After installation, many electronic throttle bodies require an ECU relearn or throttle position calibration to restore correct idle and throttle mapping. Understanding the calibration steps needed affects installation time and the need for diagnostic tools.
Select a unit that has clear, documented relearn procedures compatible with the vehicle, or one that is designed to work with standard factory relearn routines to minimize post-install troubleshooting.
FAQ
What are common throttle body symptoms I should watch for on a Buick LaCrosse?
Common signs often include rough or fluctuating idle, delayed or uneven throttle response, and sporadic stalling at low speeds. You may also see an illuminated check-engine light related to throttle position or air intake sensors. These symptoms usually indicate buildup, sensor malfunction, or a failing actuator rather than broader engine issues.
Can cleaning the throttle body fix idle surge or hesitation?
Cleaning can often reduce idle surge or hesitation when carbon deposits are the root cause. Removing buildup around the butterfly and bore restores smoother airflow and more accurate sensor readings. However, if symptoms persist after cleaning, sensor failure or mechanical wear may be to blame and further diagnosis is recommended.
How do I know if I need a full throttle body replacement versus a rebuild?
If the housing is cracked, the actuator fails, or electronic sensors are nonfunctional, a full replacement is usually the more reliable option. A rebuild or repair kit can be appropriate when wear is limited to gaskets, springs, or minor mechanical parts. Consider availability of rebuild parts and the condition of sensors when deciding.
Will replacing the throttle body require additional ECU work or relearning?
Many installations require a throttle position relearn or idle adaptation to restore proper closed-loop control. Some vehicles perform this automatically after a few ignition cycles, while others need a manual procedure with a scan tool. Be prepared to follow the vehicle-specific relearn steps to avoid idle irregularities.
Are there maintenance steps to prevent throttle body malfunction?
Regular inspection and periodic cleaning of the throttle bore and butterfly reduce carbon buildup and sensor interference. Also check intake boots and seals for air leaks and inspect electrical connectors for corrosion. Timely attention to these items lowers the chance of malfunction and preserves consistent throttle behavior.
Is it difficult to replace a throttle body on a Buick LaCrosse?
Difficulty depends on access and whether the unit is mechanically or electronically actuated. Basic replacement typically involves disconnecting electrical connectors, removing mounting bolts, and swapping gaskets. Some models require throttle recalibration afterward. If you are comfortable with moderate mechanical work and follow vehicle-specific guidance, replacement is often manageable.
How We Chose the Best Buick LaCrosse Throttle Body
We focused on products that directly address fitment and functional reliability for the Buick LaCrosse. Key evaluation criteria included physical fit and mounting alignment, throttle bore and butterfly sizing for accurate airflow, sensor compatibility and wiring connections, material quality and corrosion resistance, and long-term durability under heat and vibration. We also considered whether units allowed straightforward calibration or required minimal ECU relearn procedures and how serviceable the design is for cleaning or repair. Excluded items were generic universal adapters or parts lacking clear fitment data for the Buick LaCrosse. We did not include components that only replace gaskets or peripheral parts without addressing the throttle body assembly itself. Our selections favor units that minimize installation complexity while meeting OEM functional expectations.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a throttle body for a Buick LaCrosse, prioritize correct fitment, sensor compatibility, and airflow characteristics to preserve drivability and idle stability. Durability and serviceability are practical secondary concerns that affect long-term ownership and maintenance effort. Accept that there are tradeoffs between ease of installation and the need for calibration or rebuildability. Focus on parts that match mounting geometry and sensor outputs, and plan for a post-install relearn or inspection to confirm smooth operation.
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