Audi A4/A5 Coolant Reservoir Hose / Line 8W0121081DR

OEM Part #: 8W0-121-081-DR (8W0121081DR)

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The OEM Coolant Reservoir Hose (Part Number 8W0121081DR) is a critical component for the efficient operation of the cooling system in various Audi models, including the A4, A5, and A5 Sportback, manufactured between 2017 and 2023. This hose functions primarily to transport coolant from the reservoir to the engine, ensuring optimal temperature regulation. Its position at the front lower or upper area of the engine compartment allows for effective coolant management. Common issues such as overheating or leaks often stem from damaged hoses, making this genuine factory-original part essential for restoring vehicle reliability. This line is also referred to as a breather tube or vent tube, compatible with engines like the 2.0L L4 MILD HYBRID. Other part numbers include 8W0122449CR and 8W0121405L, affirming its role in maintaining your Audi's performance.

Specifications

Specifications for Coolant Reservoir Hose / Line 8W0121081DR
Fits Vehicle ModelA4, A5
Fits Vehicle MakeAudi
OEM Part No8W0-121-081-DR (8W0121081DR)
CategoryRadiator / Coolant

Compatible Vehicles

Fits 19 vehicle configurations across 1 make, 2017-2020.

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

  • A4 2017-2020 · 8 variants 8 with notes
  • A5 2017-2020 · 11 variants 11 with notes
View all 19 vehicle configurations — 19 with fitment notes
Full vehicle fitment list for Coolant Reservoir Hose / Line 8W0121081DR
Year Make Model Trim Engine Note
2017 Audi A4 Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date Between 06/26/17 and 07/08/19
2017 Audi A4 Quattro Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date Between 06/26/17 and 07/08/19
2017 Audi A5 Quattro Convertible 2.0L l4 Turbo For Vehicles with Production Date Between 06/26/17 and 08/19/19
2017 Audi A5 Quattro Coupe 2.0L l4 Turbo For Vehicles with Production Date Between 06/26/17 and 10/14/19
2018 Audi A4 Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date Between 06/26/17 and 07/08/19
2018 Audi A4 Quattro Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date Between 06/26/17 and 07/08/19
2018 Audi A5 Quattro Convertible 2.0L l4 Turbo For Vehicles with Production Date Between 06/26/17 and 08/19/19
2018 Audi A5 Quattro Coupe 2.0L l4 Turbo For Vehicles with Production Date Between 06/26/17 and 10/14/19
2018 Audi A5 Hatchback 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission; For Vehicles with Production Date Between 06/26/17 and 10/14/19
2019 Audi A4 Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date Between 06/26/17 and 07/08/19
2019 Audi A4 Quattro Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date Between 06/26/17 and 07/08/19
2019 Audi A5 Quattro Convertible 2.0L l4 Turbo For Vehicles with Production Date Between 06/26/17 and 08/19/19
2019 Audi A5 Quattro Coupe 2.0L l4 Turbo For Vehicles with Production Date Between 06/26/17 and 10/14/19
2019 Audi A5 Hatchback 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission; For Vehicles with Production Date Between 06/26/17 and 10/14/19
2020 Audi A4 Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date Between 06/26/17 and 07/08/19
2020 Audi A4 Quattro Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date Between 06/26/17 and 07/08/19
2020 Audi A5 Quattro Convertible 2.0L l4 Turbo For Vehicles with Production Date Between 06/26/17 and 08/19/19
2020 Audi A5 Quattro Coupe 2.0L l4 Turbo For Vehicles with Production Date Between 06/26/17 and 10/14/19
2020 Audi A5 Hatchback 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission; For Vehicles with Production Date Between 06/26/17 and 10/14/19

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