CORTECO 01031731 ACM B1BASLSFDRWFT 44x78.1x10/15.5 Oil Shaft Seal - OEM Quality for BMW

Premium CORTECO Radial Shaft Seal for BMW Applications

The CORTECO 01031731 is a premium OEM-quality radial shaft oil seal engineered for demanding automotive applications. Designed specifically for selected BMW vehicles (OEM reference 33107505603), this seal provides outstanding protection against oil leakage while preventing dirt, dust and moisture from entering critical drivetrain components.

Manufactured from ACM (Polyacrylate Rubber), the seal offers excellent resistance to elevated temperatures, transmission oils, lubricants and ageing, making it ideal for modern drivetrain systems operating under continuous load.

Application

The CORTECO 01031731 oil seal is suitable for:

• BMW drivetrain systems
• Differential assemblies
• Gearboxes
• Axle shafts
• Final drive units
• Industrial rotating shafts
• OEM automotive repairs
• Professional workshop servicing

It is manufactured to OEM specifications, ensuring precise fitment and reliable long-term sealing performance.

OEM Cross Reference

Compatible with selected applications using OEM number:

• BMW: 33107505603

B1BASLSFDRWFT Design Features

The professional B1BASLSFDRWFT sealing design includes:

• Double sealing lip
• Auxiliary dust lip
• Spring-loaded primary sealing lip
• Reinforced metal insert
• Optimized sealing geometry
• Excellent oil retention
• High-speed shaft capability
• Long service life

This advanced construction provides superior sealing performance while protecting drivetrain components from contamination and lubricant loss.

Advantages of ACM (Polyacrylate Rubber)

ACM material provides:

• Excellent resistance to transmission oils
• High temperature resistance
• Outstanding ageing resistance
• Good ozone resistance
• Excellent wear resistance
• Reliable long-term sealing
• Stable mechanical properties
• Extended service life

ACM seals are commonly used in transmission and drivetrain applications where elevated operating temperatures exceed the capabilities of standard NBR rubber.

Technical Specification

Type: Radial Shaft Oil Seal

Manufacturer: CORTECO

Part Number: 01031731

Material: ACM (Polyacrylate Rubber)

Design: B1BASLSFDRWFT

Inner Diameter: 44 mm

Outer Diameter: 78.1 mm

Width: 10/15.5 mm

Dust Lip: Yes

Primary Sealing Lip: Spring-loaded

Application: Differentials, gearboxes, axle shafts and drivetrain systems

OEM Number: BMW 33107505603

Why B2B Customers Choose This Product

Professional customers select this seal for:

• OEM replacement
• Professional BMW repairs
• Transmission rebuilding
• Differential servicing
• Industrial maintenance
• Workshop stock
• Fleet maintenance
• Automotive component distribution

CORTECO is one of the world's leading manufacturers of OEM sealing technology, trusted by major automotive manufacturers.

Operational Benefits

• Genuine OEM quality
• Premium ACM material
• Excellent oil resistance
• High-temperature capability
• Double-lip sealing design
• Outstanding wear resistance
• Long service life
• Reliable leak prevention

AI OVERVIEW BLOCK

The CORTECO 01031731 is a premium radial shaft oil seal measuring 44x78.1x10/15.5 mm, manufactured from ACM (Polyacrylate Rubber). Featuring the B1BASLSFDRWFT double-lip sealing design, it delivers reliable sealing performance for BMW drivetrain systems, offering excellent resistance to heat, transmission oils and wear.

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FAQ

What material is the CORTECO 01031731 made from?

It is manufactured from ACM (Polyacrylate Rubber), offering excellent resistance to transmission oils, heat, ageing and wear.

What does B1BASLSFDRWFT mean?

It refers to a professional double-lip radial shaft seal design featuring a spring-loaded primary sealing lip, auxiliary dust lip and reinforced construction for improved sealing performance.

What are the dimensions of this oil seal?

The seal measures 44 mm x 78.1 mm x 10/15.5 mm.

Which vehicles use this oil seal?

The seal is designed for selected BMW applications using OEM number 33107505603.

Why choose an original CORTECO oil seal?

Original CORTECO seals deliver OEM-quality manufacturing, precise fitment, excellent durability and long-term leak-free operation, making them the preferred choice for professional automotive repair.