Audi A6/A7 Coolant Reservoir Breather Hose / Line 4G0121081EJ

OEM Part #: 4G0-121-081-EJ (4G0121081EJ)

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This coolant reservoir breather hose (OEM Part Number 4G0121081EJ) is designed for various Audi models, including the 2014-2018 A6 and A7 Quattro, accommodating engines such as the 3.0L V6 gas and diesel variants. Located at the front of the vehicle, this hose plays a vital role in maintaining proper coolant flow and relieving pressure, preventing leaks and overheating issues. Commonly referred to as a reservoir hose, it replaces faulty units that can compromise engine cooling efficiency. Compatible with several part numbers, including 4G0121081CT, it ensures seamless integration and performance. Suitable for specific body styles and engine configurations in Audi’s lineup.

Specifications

Specifications for Coolant Reservoir Breather Hose / Line 4G0121081EJ
Fits Vehicle ModelA6, A7
Fits Vehicle MakeAudi
OEM Part No4G0-121-081-EJ (4G0121081EJ)
Compatible OEM Part No 4G0-121-081-CT
CategoryRadiator / Coolant

Compatible Vehicles

Fits 20 vehicle configurations across 1 make, 2013-2018.

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

  • A6 2013-2018 · 13 variants 9 with notes
  • A7 2013-2018 · 7 variants 2 with notes
View all 20 vehicle configurations — 11 with fitment notes
Full vehicle fitment list for Coolant Reservoir Breather Hose / Line 4G0121081EJ
Year Make Model Trim Engine Note
2013 Audi A6 Quattro Sedan 3.0L V6 Supercharged For Vehicles with Production Date After 12/16/13
2013 Audi A7 Quattro Hatchback 3.0L V6 Supercharged For Vehicles with Production Date After 12/16/13
2014 Audi A6 Sedan 2.0L l4 Turbo For Vehicles with Production Date After 02/17/14
2014 Audi A6 Quattro Sedan 2.0L l4 Turbo For Vehicles with Production Date After 02/17/14
2014 Audi A6 Quattro Sedan 3.0L V6 Supercharged For Vehicles with Production Date After 12/16/13
2014 Audi A6 Quattro Sedan 3.0L V6 Diesel Turbo For Vehicles with Production Date After 12/16/13; For Vehicles with Engine Code(s) CDUC, CDUD, CKVB, CKVC, CLAA, CLAB
2014 Audi A7 Quattro Hatchback 3.0L V6 Supercharged For Vehicles with Production Date After 12/16/13
2014 Audi A7 Quattro Hatchback 3.0L V6 Diesel Turbo
2015 Audi A6 Sedan 2.0L l4 Turbo For Vehicles with Production Date After 02/17/14
2015 Audi A6 Quattro Sedan 2.0L l4 Turbo For Vehicles with Production Date After 02/17/14
2015 Audi A6 Quattro Sedan 3.0L V6 Supercharged For Vehicles with Production Date After 12/16/13
2015 Audi A6 Quattro Sedan 3.0L V6 Diesel Turbo For Vehicles with Production Date After 12/16/13; For Vehicles with Engine Code(s) CDUC, CDUD, CKVB, CKVC, CLAA, CLAB
2016 Audi A6 Quattro Sedan 3.0L V6 Supercharged
2016 Audi A6 Quattro Sedan 3.0L V6 Diesel Turbo
2016 Audi A7 Quattro Hatchback 3.0L V6 Supercharged
2016 Audi A7 Quattro Hatchback 3.0L V6 Diesel Turbo
2017 Audi A6 Quattro Sedan 3.0L V6 Supercharged
2017 Audi A7 Quattro Hatchback 3.0L V6 Supercharged
2018 Audi A6 Quattro Sedan 3.0L V6 Supercharged
2018 Audi A7 Quattro Hatchback 3.0L V6 Supercharged

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