40440302 B34/00 AT-05150R D5150 Idle Air Control Valves

The 40440302 B34/00 AT-05150R D5150 Idle Air Control Valve is an engine management replacement component designed for compatible Volkswagen gasoline vehicles. Also identified by the reference numbers AT-05150R and D5150, this idle air control valve regulates bypass airflow around the throttle plate to help the engine maintain a controlled idle speed. It is intended for selected Volkswagen Polo, Quantum, and Santana applications equipped with compatible MPI fuel injection systems. The product is suitable for automotive spare parts wholesalers, independent repair workshops, and distributors supplying replacement components for established vehicle platforms.

Volkswagen Polo: Designed for compatible Polo 1.6L and 1.8L 8-valve gasoline models from 2002 onward, subject to engine configuration and original part number verification.
Volkswagen Quantum: Applicable to selected Quantum 1.8L and 2.0L 8-valve MPI gasoline models from 2002 onward.
Volkswagen Santana: Suitable for compatible Santana 1.8L and 2.0L 8-valve MPI gasoline vehicles from 2002 onward.
Automotive Aftermarket Replacement: Intended for workshops and parts distributors handling idle control repairs on compatible Volkswagen vehicles. The original component number and vehicle configuration should be checked before installation.
Vehicle applications may vary by production year, regional market, and fuel injection configuration. Confirm compatibility using the VIN and original part number.

Controlled Idle Airflow: The 40440302 B34/00 AT-05150R D5150 Idle Air Control Valve adjusts the bypass air entering the engine while the throttle is closed. This allows the engine management system to regulate idle speed under different operating conditions.

Stepper Motor Control: This type of idle air control actuator uses stepper motor movement to adjust the airflow passage. Its operation works in conjunction with the engine control unit and other engine sensors.

Multiple Reference Number Identification: The product is associated with 40440302, B34/00, AT-05150R, and D5150. Related catalog references include 40430102 and Bosch F00099M150. Buyers should verify exact interchangeability rather than treating every cross-reference as universally interchangeable.

Gasoline MPI Application: Designed for specified multi-point fuel injection applications, this Volkswagen idle air control valve serves replacement requirements for compatible 8-valve gasoline engines.

Repair and Maintenance Support: A defective idle air control actuator may contribute to irregular idle speed, engine stalling, or unstable RPM. Replacing a confirmed faulty component can help restore proper idle control, although the complete engine management system should be diagnosed before repair.

We support OEM/ODM cooperation for idle air control valves and other automotive electrical replacement components, subject to product availability and manufacturing capabilities.

Available customization requirements can be discussed for product labeling, logo presentation, packaging, and project-specific identification. Distributors developing a Volkswagen idle air control valve range can provide their target references, vehicle applications, estimated order quantity, and destination market for further evaluation.

Our goal is to help aftermarket buyers coordinate component identification, packaging requirements, and order arrangements for their distribution channels.

MOQ: To be discussed according to order requirements.
Lead Time: To be confirmed based on stock availability, order quantity, and customization requirements.
Shipping Method: Samples and small shipments can be arranged by express service or air freight. Bulk orders can be shipped by sea or air according to delivery requirements.
Packaging: Standard packaging or customized labels and packaging can be discussed according to project needs.
Payment Terms: Payment conditions can be confirmed during quotation and order negotiation.
Quality Documentation: Available inspection records and applicable test reports can be confirmed according to the actual product configuration and destination market.

Q1: How does an idle air control valve work with the engine control unit?
A: The engine control unit uses operating information from relevant sensors to regulate the idle air control actuator. The actuator adjusts bypass airflow to help maintain the required idle speed as engine load and operating conditions change.

Q2: Can a dirty throttle body cause symptoms similar to a faulty IAC valve?
A: Yes. Carbon deposits around the throttle plate or bypass passage can interfere with airflow and contribute to unstable idle speed. A vacuum leak, sensor fault, or wiring issue may produce similar symptoms, so diagnosis should precede replacement.

Q3: Are 40440302 and 40430102 the same replacement part?
A: Both numbers appear in related aftermarket catalog references for this idle control valve family. However, buyers should verify the exact vehicle application, connector, mounting dimensions, and original equipment reference before confirming interchangeability.

Q4: Does the 40440302 B34/00 AT-05150R D5150 idle air control valve fit diesel Volkswagen vehicles?
A: The supplied application information covers specified gasoline engines, including Polo 1.6L/1.8L and Quantum or Santana 1.8L/2.0L MPI configurations. Diesel applications should not be assumed compatible without a matching reference and confirmed vehicle fitment.

Q5: What should technicians inspect before installing a replacement IAC valve?
A: Inspect the electrical connector, wiring condition, mounting surface, bypass air passage, and surrounding intake system. Compare the replacement with the removed component and follow the vehicle manufacturer's installation and calibration procedures.

Q6: How can wholesalers reduce incorrect orders for the 40440302 B34/00 AT-05150R D5150 idle air control valve?
A: Maintain a catalog that records the main part number, alternative references, supported models, engine specifications, and year ranges. Requesting the VIN or a clear image of the original component can help resolve uncertain applications before shipment.