VW Throttle Valve Body 036133062L 408238321006Z For VW 1.4L and 1.6L Naturally Aspirated Engines

1.Vehicle Compatibility Table

Throttle Valve Body P/N: 036133062L / 408238321006Z
Engine Application: Primarily for 1.4L & 1.6L Naturally Aspirated (MPI) Engines (e.g., CFNA, CPDA, CSRA)

2. Product Introduction & Features

This is an electronic throttle body (ETB), also known as an "E-Gas" system. It is a core component for modern engine management. Its key features include:

• OE Quality: The part number (starting with 036) indicates it meets Volkswagen's original equipment standards, ensuring perfect fitment and reliability.

• High-Precision Motor: Integrates a precision electric motor that receives commands from the Engine Control Unit (ECU) to control the valve flap with high accuracy.

• Integrated Sensors: Contains dual potentiometers (angle sensors) that provide real-time feedback on the throttle valve's position to the ECU for closed-loop control.

• Drive-by-Wire Design: Unlike traditional cable-operated throttles, it is electronically controlled, enabling features like cruise control, traction control (ASR), and engine protection.

3. Technical Principle

The throttle body is mounted on the engine's intake manifold. Its operating principle is as follows:

1. Command Reception: When the accelerator pedal is pressed, the pedal sensor sends a signal to the engine ECU.

2. ECU Calculation: The ECU calculates the optimal throttle opening based on various data (e.g., engine speed, load, temperature).

3. Motor Actuation: The ECU sends a command signal to the throttle body's electric motor.

4. Valve Adjustment: The motor drives a gear mechanism to rotate the throttle plate (butterfly valve), precisely regulating the airflow into the engine.

5. Feedback Loop: Integrated sensors continuously report the actual valve position back to the ECU, which makes fine adjustments to ensure accuracy.

4. Purpose & Function

Its core purpose is to precisely regulate the volume of air entering the engine's combustion chambers. This directly determines fuel injection quantity, impacting engine power, fuel efficiency, and emissions. Key functions include:

• Power Management: Controls engine air intake based on driver input for acceleration and deceleration.

• Idle Speed Control: Maintains a minimal opening to ensure stable engine operation when the vehicle is stationary.

• Feature Enablement: Serves as the critical actuator for advanced features like cruise control, traction control (ASR), and electronic stability program (ESP).

• Emission Control: Helps manage the air-fuel ratio for efficient operation of the catalytic converter, reducing harmful emissions.