Genuine 077121437 Engine Coolant Pipe O-Ring

Engine Coolant Pipe O-Ring for Audi V8 Cooling Systems

This Genuine engine coolant pipe O-ring is a direct sealing component for select Audi cooling system service points. Part number 077121437 is used at the oil cooler housing, heater return pipe, and in the oil cooler on covered applications.

Key Features

• Genuine replacement coolant pipe O-ring
• 15 x 2 mm sealing size
• Used at multiple coolant and oil cooler sealing locations
• Direct fit for select Audi A6 Quattro, RS6, and A8 Quattro models
• Part number 077121437 for accurate ordering and service matching

Detailed Description

Genuine 077121437 is an engine coolant pipe O-ring made for sealing coolant passages in specific Audi V8 applications. It is listed for 2000-2004 Audi A6 Quattro, 2003-2004 Audi RS6, and 1997-2003 Audi A8 Quattro, with additional coverage for 1997-1999 Audi A8. Use this seal when servicing the feed pipe at the oil cooler housing, the heater return pipe, or the in oil cooler connection where a 15 x 2 mm O-ring is specified.

For buyers searching for an Audi A6 Quattro coolant pipe O-ring, Audi RS6 heater return pipe seal, or Audi A8 Quattro oil cooler O-ring, part number 077121437 provides the exact reference needed for the listed applications.

Common Repair Uses

• Stops coolant seepage at the oil cooler housing connection
• Restores sealing at the heater return pipe
• Addresses leaks at the in oil cooler interface
• Replaces a flattened, hardened, or damaged O-ring during cooling system service
• Supports leak repair on Audi A6 Quattro, Audi RS6, and Audi A8 Quattro cooling circuits

Installation Notes and Tips

Confirm the required size before installation: 15 x 2 mm. Inspect the mating surfaces, clean the groove, and replace the seal whenever the pipe or cooler connection is opened. Lightly lubricate the O-ring with the correct coolant or assembly lubricant approved for the repair, then seat it evenly to avoid twisting or pinching.

Quality Assurance

This Genuine part is built to match the specified OE-style application for the listed Audi models. Verify fitment by year, model, and sealing location before installation. Part number 077121437 is the key reference for ordering the correct coolant pipe O-ring for these service points.