Elring 003.520 Turbocharger Seal Ring

Turbocharger Seal Ring for BMW Applications

Elring 003.520 is a turbocharger seal ring built as an FPM O-ring with a 41 mm inner diameter, 45 mm outer diameter, and 2 mm thickness. It is specified for BMW turbocharged engine sealing applications where precise fit and heat-resistant sealing performance matter.

Key Features

• Turbocharger seal ring for air and fuel delivery sealing systems
• FPM (fluoride rubber) material for demanding under-hood conditions
• O-ring shape with 41 mm inner diameter, 45 mm outer diameter, and 2 mm thickness
• Elring part number 003.520 for direct catalog identification
• Cross-reference: BMW 11 65 7 577 018

Detailed Description

Elring 003.520 is a turbocharger seal ring used in BMW turbocharger sealing locations where a stable, dimensionally accurate O-ring is required. The FPM construction supports sealing performance in high-temperature engine environments, while the listed dimensions help ensure the correct match for the intended turbocharger connection. This part number, 003.520, is a practical choice for service work on BMW 650i, 750i, X5, X6, and related models when the original seal ring needs replacement.

Compatible BMW applications include 2013-2019 BMW 650i Gran Coupe, 2013-2019 BMW 650i xDrive Gran Coupe, 2009-2019 BMW 750i, 2010-2019 BMW 750i xDrive, 2008-2019 BMW X6, 2012-2018 BMW 650i, 2012-2018 BMW 650i xDrive, 2010-2018 BMW X5, 2010-2017 BMW 550i GT xDrive, 2011-2016 BMW 550i, 2011-2016 BMW 550i xDrive, 2009-2016 BMW 750Li, 2010-2015 BMW 550i GT, and 2010-2015 BMW 750Li xDrive. Elring 003.520 is also a direct reference point when searching for BMW turbocharger seal ring replacement parts.

What It Helps Address

• Turbocharger sealing leaks at the O-ring interface
• Loss of boost pressure caused by worn sealing material
• Oil seepage or residue around turbocharger sealing points
• Air leakage that can affect engine performance and drivability
• Replacement needs during turbocharger or intake-side service

Installation Notes and Tips

Verify the seal ring dimensions before installation: 41 mm inner diameter, 45 mm outer diameter, and 2 mm thickness. Inspect the mating surfaces for wear, carbon buildup, or damage before installing the new O-ring, and confirm the seal seats evenly in the turbocharger groove or housing. For BMW turbocharger service, match the part number 003.520 and the OE cross-reference 11 65 7 577 018 to the vehicle’s original sealing specification.

Quality Assurance

Elring is a recognized sealing-system manufacturer, and this turbocharger seal ring is produced to meet the dimensional and material requirements listed for the application. Use the confirmed fitment and OE cross-reference to verify selection before service.