Elring 331.270 Engine Coolant Bypass Line Seal Ring

Elring 331.270 Engine Coolant Bypass Line Seal Ring

Elring 331.270 is an engine coolant bypass line seal ring built around precise dimensions for a secure coolant-system seal. With an inner diameter of 20.5 mm and a thickness of 5.5 mm, it is specified for select Audi and Volkswagen applications that call for OE reference 06B121687.

Key Features

• Inner diameter: 20.5 mm for correct coolant line sealing
• Thickness: 5.5 mm for proper compression and fit
• Elring sealing component for engine cooling system service
• OE cross-reference: 06B121687
• Direct fitment coverage for select Audi A3, A4, A5, A6, Q3, Q5, TT and Volkswagen Golf, Jetta, Passat, Tiguan, Beetle, Caddy, Crafter, Amarok, Polo, Vento, Multivan, and Crafter Van applications

Detailed Description

This Elring coolant bypass line seal ring is a precision sealing part for vehicles that use the specified OE-style coolant connection. The 20.5 mm inner diameter and 5.5 mm thickness are the key dimensions that determine sealing performance, helping maintain a tight interface at the bypass line connection. It cross-references OE number 06B121687 and is listed for a wide range of Audi and Volkswagen models, including Audi A3, A4, A5, A6, Q3, Q5, TT, and Volkswagen Golf, Jetta, Passat, Tiguan, Beetle, Caddy, Crafter, Amarok, Polo, Vento, and Multivan. This part number, 331.270, is the reference to verify against the original seal before ordering.

This part cross-references OE number 06B121687 for the same application.

What It Is Used For

• Replacing a worn or flattened coolant bypass line seal ring
• Restoring a proper seal at the coolant line connection
• Addressing coolant seepage at the bypass line interface
• Correcting fitment issues caused by incorrect seal dimensions
• Supporting service on Audi and Volkswagen cooling-system repairs

Installation Notes and Tips

Verify the OE number and measure the original seal before installation. Confirm the inner diameter and thickness match the application, especially on Audi Q3, Q5, A4, A5, A6, and Volkswagen Golf, Jetta, Passat, Tiguan, and Beetle models. Clean the sealing surfaces thoroughly and inspect the coolant line and mating housing for wear, scoring, or residue before fitting the new seal ring. Use the vehicle’s service procedure for coolant system reassembly and refill.

Quality Assurance

Elring is a recognized sealing-system manufacturer, and this seal ring is built to OE-referenced dimensions for the listed applications. Part number 331.270 is specified to match the stated coolant bypass line seal requirements.