Audi A4 B8 A5 8T Engine Starter Motor Actuator Unit Petrol 06D911021B

Audi A4 B8 A5 8T Engine Starter Motor Actuator Unit Petrol is an original component from the Starters group, designed for petrol-powered engines. It ensures reliable engine starting, which translates into confident and predictable operation of the drivetrain in daily use.

Specifications and technical data

• SKU: 06D911021B
• Mark: Audi
• Condition: Used
• OEM Part Number: 06D911021B
• Substitutable numbers: 06D911021B, 06D 911 021 B
• Fuel type: Petrol
• Part type: Starter Motor
• Category: Starter Motors

Purpose and compatibility

The presented starter motor is designed for Audi A4 B8 and Audi A5 8T models with petrol engines. The construction, based on the vehicle manufacturer's specifications, guarantees a proper fit to the gearbox housing, correct engagement with the flywheel ring gear, and compatibility with the factory electrical system.

By maintaining the parameters of the original component, the starter works with the engine control system without the need for wiring modifications or additional programming. This is a practical solution when replacing a worn-out part in vehicles used both in city traffic and on longer routes.

Construction and operating characteristics

The starter belongs to the group of electric starting drives, where a DC motor, a gear unit, and a coupling mechanism with the flywheel ring gear play a key role. The applied design ensures:

• efficient torque transfer to the crankshaft of the petrol engine,
• stable starting under typical operating conditions,
• proper cooperation with the vehicle's onboard voltage system.

The appropriately selected gear ratio and electrical characteristics allow for quickly reaching the required crankshaft rotational speed, which shortens the starting time and reduces the load on the battery. This is particularly important in vehicles used intensively, where the repeatability of starts is of great importance.

Application in petrol engines

The starter has been prepared for use with petrol-powered engines, which means it is matched to the compression characteristics and starting torque requirements of such engines. Optimal current and mechanical characteristics allow for efficient engine starting while maintaining appropriate component durability.

In Audi vehicles with petrol engines, a correctly selected starter has a direct impact on user comfort – a quick engine start reduces vibrations, decreases the load on the drivetrain, and supports the stable operation of onboard electronics during the starting phase.

Condition, verification, and installation advantages

The offered item is in used condition, which allows for an economical starter replacement while maintaining the vehicle manufacturer's original design. Before reinstallation in the car, it is recommended to perform a standard check of the electrical system, the condition of power cables, and ground points to fully utilize the component's capabilities.

A key advantage of the starter from this offer is its origin from the group of parts dedicated to Audi, which facilitates installation in place of the factory element. In practice, this means proper positioning relative to the flywheel, compatibility with mounts, and predictable behavior during operation, without the need for mechanical adaptation.

Expanding the Audi starting system

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as additional starting drives, alternative starter units, or compatible mounting components, check the available parts in the Audi Starters category.

To better take care of the durability of the drivetrain and engine operating comfort, it is also worth paying attention to the efficiency of the cooling system – you can find more practical tips in the guide on the impact of summer temperatures on engine cooling and the advantages of used radiators and fans.