Smart Fortwo 451 Air Throttle Body Actuator Valve Mikuni M132 Petrol A1320700027

The Smart Fortwo 451 Mikuni M132 Gasoline Air Throttle Body is a precise intake system component, designed specifically for the gasoline engines of this model. It is responsible for accurate air metering, which translates to stable engine operation, predictable throttle response, and proper cooperation with the control electronics. Thanks to the proven Mikuni design, this air throttle body ensures correct flow parameters under the typical operating conditions of a city car.

Specifications and technical data

• SKU: A1320700027
• Mark: Smart
• Condition: Used
• OEM Part Number: A1320700027
• Substitutable numbers: A1320700027, A 132 070 00 27
• Fuel type: Petrol
• Part type: Throttle Body
• Category: Throttle Bodies

Function and Role of the Throttle Body in Smart Fortwo 451

The throttle body in the Smart Fortwo 451 gasoline engine plays a crucial role in controlling the amount of air drawn into the cylinders. In practice, this means that it:

• regulates engine load by changing the cross-section of the intake manifold,
• influences acceleration dynamics and smooth starting,
• cooperates with sensors and the engine control unit, stabilizing idle speed,
• enables the maintenance of the correct fuel-air mixture ratio.

A well-chosen and functional Mikuni throttle body helps to reduce jerking, fluctuating RPMs, and starting problems, which is particularly important in urban driving with frequent stops and starts.

Construction and Technical Fitment

The presented throttle body belongs to the Throttle Bodies category and has been developed for compatibility with the gasoline fuel system in the Smart Fortwo 451. The Mikuni construction ensures a properly shaped intake channel and a precise mechanism for controlling the flap position, allowing the engine control unit to accurately meter air across the entire RPM range.

The component is designed for installation in the intake system without the need for manifold geometry modifications or additional mechanical adjustments. This preserves the original engine operating characteristics and minimizes the risk of electronic adaptation issues.

Benefits of Using an Original Mikuni Throttle Body

Using a dedicated throttle body in the Smart Fortwo 451 brings a range of practical operational benefits:

• Stable Idle Operation – correct throttle flap control facilitates maintaining steady RPMs, especially after the engine has warmed up.
• Improved Accelerator Pedal Response – accurate translation of control signals results in predictable acceleration.
• Compatibility with Factory ECU Software – the throttle body, prepared for cooperation with the M132 engine characteristics, minimizes the risk of diagnostic errors.
• Fuel Consumption Optimization – proper airflow helps maintain the mixture within the manufacturer's specified range.

For the driver, this means a more comfortable urban driving experience, a reduced risk of engine stalling when approaching intersections, and easier diagnostics if further service work is required.

Condition, Verification, and Practical Application

The offered throttle body is a used part, allowing for economical repair of the intake system while retaining a component with a specific design for the Smart Fortwo 451. This type of part is particularly useful in situations where symptoms such as unstable RPMs, power loss, or error messages related to the throttle position occur.

Before installation, a standard service procedure is recommended, including checking the intake system for leaks, inspecting the condition of vacuum hoses, and performing throttle body adaptation according to the vehicle manufacturer's recommendations. This approach increases the chances of achieving repeatable engine operating parameters and reduces the need for additional adjustments.

Expanding the Intake System in Smart Vehicles

If you are planning a comprehensive repair or upgrade of the engine area in your Smart and need other parts from the same group, such as additional throttle bodies, control elements, or throttle body housings, check the available parts in the Smart Throttle Bodies category.

For drivers interested in a broader context of modern fuel and exhaust gas recirculation systems, an article describing the role of EGR valves and the rationale for using aftermarket parts may be helpful – more information can be found in the material EGR: What It Is and Why Consider Used EGR Valves.