Audi S6/S7 Coolant Reservoir Breather Hose / Line Front, Left 4G0121081BH

OEM Part #: 4G0-121-081-BH (4G0121081BH)

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The OEM Coolant Reservoir Breather Hose (Part Number 4G0121081BH) plays a critical role in maintaining the cooling system's efficiency in Audi S6 and S7 models from 2013 to 2015. Located at the front left of the vehicle, this vent tube ensures proper pressure balance within the coolant reservoir, allowing coolant to flow freely and preventing air pockets that could lead to overheating. Common issues include wear and cracking, which can result in coolant leaks or system malfunctions. By replacing a worn or damaged breather hose, you enhance the performance and reliability of your vehicle's cooling system. This part is a genuine replacement sourced from salvage Audis, confirming its authenticity and fitment for optimal performance.

Specifications

Specifications for Coolant Reservoir Breather Hose / Line 4G0121081BH
Fits Vehicle ModelS6, S7
Fits Vehicle MakeAudi
OEM Part No4G0-121-081-BH (4G0121081BH)
SideFront, Left
CategoryRadiator / Coolant

Compatible Vehicles

Fits 5 vehicle configurations across 1 make, 2013-2015.

Check your specific vehicle before ordering. This list shows year, make, and model. Some years have multiple trims or engines that use different parts, and individual listings may have additional fitment notes (e.g. “with sunroof only”). Review the full variant list below, or message us with your VIN and we’ll confirm the match.

Audi

  • S6 2013-2015 · 3 variants 3 with notes
  • S7 2013-2014 · 2 variants 2 with notes
View all 5 vehicle configurations — 5 with fitment notes
Full vehicle fitment list for Coolant Reservoir Breather Hose / Line 4G0121081BH
Year Make Model Trim Engine Note
2013 Audi S6 Sedan 4.0L V8 Turbo For Vehicles With Production date Up To 05/26/14
2013 Audi S7 Hatchback 4.0L V8 Turbo For Vehicles With Production date Up To 05/26/14
2014 Audi S6 Sedan 4.0L V8 Turbo For Vehicles With Production date Up To 05/26/14
2014 Audi S7 Hatchback 4.0L V8 Turbo For Vehicles With Production date Up To 05/26/14
2015 Audi S6 Sedan 4.0L V8 Turbo For Vehicles With Production date Up To 05/26/14

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