CORTECO 01035172B ACM BASLSFRSX7 oil seal 52x80x8/12 BMW

Construction and design

The CORTECO 01035172B oil seal is a precision engineered rotary shaft seal designed for drivetrain and transfer case applications where sealing reliability is critical. The BASLSFRSX7 design incorporates a main sealing lip, an additional dust lip and a helical structure that improves sealing efficiency under rotation.

This model is manufactured from ACM acrylic rubber, a material known for its excellent resistance to heat, oil and aging. The integrated left hand helical flange supports directional sealing performance, reducing leakage and maintaining optimal pressure conditions inside the system.

Technical parameters

• Manufacturer: CORTECO
• Model: 01035172B
• Type: BASLSFRSX7 rotary shaft oil seal
• Inner diameter: 52 mm
• Outer diameter: 80 mm
• Width: 8/12 mm
• Material: ACM acrylic rubber
• Design: dual lip with dust lip and helical flange
• Rotation: left hand helix
• OEM reference: BMW 27107539265

Technical snippet:
The 52x80x8/12 ACM oil seal BASLSFRSX7 provides directional sealing support, combining dual lip protection with helical geometry to minimize leakage and contamination.

Industrial and automotive applications

This CORTECO oil seal is specifically designed for BMW drivetrain systems, including transfer cases and output shaft assemblies. It is widely used in models such as BMW X3 E83, BMW X5 E53 and E70, and other vehicles requiring OEM reference 27107539265.

The 52x80x8/12 configuration is optimized for high performance automotive environments where vibration, temperature fluctuations and continuous rotation are present. It ensures effective sealing in both OEM and replacement applications.

Operational advantages

The CORTECO 01035172B seal delivers advanced performance in demanding automotive conditions thanks to its specialized design and material properties.

Key advantages:

• ACM material with high resistance to oil and temperature up to 150 C
• dual lip design for enhanced sealing and contamination protection
• helical flange improving sealing under rotation
• precise OEM fit without modification
• long service life under thermal and mechanical stress

Main description

The CORTECO 01035172B ACM BASLSFRSX7 oil seal 52x80x8/12 is a high performance sealing component designed for automotive drivetrain systems where durability, precision and resistance to harsh operating conditions are essential.

This model is commonly used as a replacement for BMW OEM part 27107539265 and is frequently applied in transfer case and output shaft assemblies. The BASLSFRSX7 design represents an advanced sealing solution, combining a main sealing lip, a dust lip and a directional helical structure that enhances sealing efficiency during shaft rotation.

The 52x80x8/12 size ensures optimal fit and performance in BMW driveline systems, where maintaining oil integrity and preventing contamination is critical for long term reliability. The ACM material offers superior resistance to heat, oxidation and chemical exposure, making it a preferred choice over standard rubber compounds in high temperature environments.

Thanks to CORTECO precision manufacturing, this oil seal provides consistent sealing performance, reduced wear and extended service intervals. It is widely used in professional automotive service and maintenance, particularly in applications where OEM level quality and exact fit are required.

This product is often searched under terms such as Corteco 01035172B seal, BMW 27107539265 oil seal and 52x80x8/12 ACM shaft seal, making it a key component in the global aftermarket for BMW driveline systems.

FAQ

Is this oil seal compatible with my BMW?
Yes, it fits vehicles using OEM number 27107539265 including BMW X3 E83, X5 E53 and E70, and selected X6 models.

What does BASLSFRSX7 mean?
It refers to a dual lip oil seal with a dust lip and a helical groove designed for directional shaft sealing.

Why is ACM material used?
ACM provides improved resistance to heat, oil and aging compared to standard rubber materials.

Does this seal include dust protection?
Yes, the additional dust lip protects against contamination and debris.

Is installation modification required?
No, it is an OEM precision fit designed for direct replacement.