Audi A3 8P VW Golf Mk5 Crankshaft Sensor Sealing Flange 1.6 FSI BLF 030103173

Audi A3 8P VW Golf Mk5 Crankshaft Sensor Sealing Flange 1.6 FSI BLF is an original Volkswagen group component, designed for precise crankshaft sealing in 1.6 FSI BLF petrol engines used in vehicles such as the Audi A3 8P and VW Golf Mk5. This used OEM part allows for a technically correct repair of the crankshaft-piston system, maintaining factory fitment and engine performance parameters.

Specifications and technical data

• SKU: 030103171S
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 030103171S
• Substitutable numbers: 030103171S, 030 103 171 S
• Category: Other Engine Parts

Function and application of the crankshaft sealing flange

The crankshaft sealing flange in the 1.6 FSI BLF engine is responsible for tightly separating the engine interior from the environment in the area of the crankshaft output. A correctly selected component:

• limits oil leaks from the rear of the engine,
• supports the maintenance of stable oil pressure,
• reduces the risk of clutch or gearbox contamination with oil,
• ensures compliance with the factory geometry of the seal seat.

As a result, the 1.6 FSI BLF crankshaft sealing flange is a critical component during repairs involving gearbox removal, clutch replacement, or addressing leaks in the rear section of the engine.

Benefits of using an original Volkswagen component

Choosing a used, original flange from the Volkswagen group allows for maintaining factory fitment to the engine block and crankshaft. In practice, this means:

• reliable compatibility with the 1.6 FSI BLF unit in the Audi A3 8P and VW Golf Mk5,
• appropriate rigidity and stability of the seal mounting,
• preservation of the contact surface geometry specified by the manufacturer.

This solution is particularly beneficial for servicing vehicles where compliance with the manufacturer's technical documentation and hassle-free installation in place of a worn component are priorities.

Selection and installation in the drivetrain

When replacing the crankshaft sealing flange in a 1.6 FSI BLF engine, it is crucial to match it to the specific version of the engine and body type (Audi A3 8P, VW Golf Mk5). An original component from the same design family:

• facilitates installation without the need for seat modifications,
• allows for the use of standard service procedures,
• promotes the maintenance of correct crankshaft and seal coaxiality.

In practice, this translates to more efficient service handling and a lower risk of having to remove the gearbox again shortly after the repair.

Part condition and use in cost-effective repairs

The presented crankshaft sealing flange is a used part, which allows for reduced repair costs while maintaining the original manufacturer's specifications. This type of solution is often chosen for:

• maintenance repairs in older Audi A3 8P and VW Golf Mk5 models,
• servicing fleet vehicles where cost-effectiveness is key,
• restoring factory configuration after previous, unsuccessful repairs.

Combining original origin with a more favorable price makes this component a reasonable choice for comprehensive 1.6 FSI BLF engine maintenance.

If you are planning a comprehensive repair or upgrade of your Volkswagen's engine area and need other components from the same group, such as flanges, seals, or small mounting parts, check out the available parts in the Other Volkswagen category.

Technical support and knowledge about Audi and Volkswagen models

When working with FSI units, it is worth knowing the design differences between individual engine versions and models. For users interested in a broader technical context within the Audi range, including solutions used in sports variants, the article Audi RS vs other models – what is hidden under the hood and chassis? may be helpful, as it discusses, among other things, the specifics of engines, brakes, and chassis.

If you want to further optimize the service costs of your Volkswagen, it is worth reading the guide Repairing a Volkswagen for pennies? Discover how to save on original car parts, which describes a practical approach to using original used parts and replacements while maintaining safety and proper vehicle operation.