Audi A4/A5 Coolant Reservoir Hose / Line 8W0121081AN

OEM Part #: 8W0-121-081-AN (8W0121081AN)

This page covers one exact OEM part number. Every unit we stocked has sold.

  • Genuine OEM — real photos
  • 30-day returns on eligible parts
  • eBay Top Rated · 100,000+ positive ratings
  • Ships from our own indoor warehouse

The Audi Coolant Reservoir Hose, OEM part number 8W0121081AN, is a crucial component located at the front, upper section of the vehicle's cooling system. This hose facilitates the flow of coolant between the reservoir and the engine, ensuring proper temperature regulation. Common failures include leaks or damage due to wear, which can lead to engine overheating. This part is compatible with 2017-2021 Audi A4, A4 Quattro, A5, A5 Quattro, A4 allroad, and A5 Sportback models, featuring the 2.0L L4 gas engine. Alternate terms include breather tube. Replace this line promptly if you notice coolant loss or poor engine performance to maintain optimal functioning of your vehicle's cooling system.

Specifications

Specifications for Coolant Reservoir Hose / Line 8W0121081AN
Fits Vehicle ModelA4, A5
Fits Vehicle MakeAudi
OEM Part No8W0-121-081-AN (8W0121081AN)
CategoryRadiator / Coolant

Compatible Vehicles

Fits 35 vehicle configurations across 1 make, 2017-2024.

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 2017-2024 · 12 variants 12 with notes
  • A5 2017-2024 · 23 variants 19 with notes
View all 35 vehicle configurations — 31 with fitment notes
Full vehicle fitment list for Coolant Reservoir Hose / Line 8W0121081AN
Year Make Model Trim Engine Note
2017 Audi A4 Sedan 2.0L l4 Turbo For Automatic Transmission
2017 Audi A4 Quattro Sedan 2.0L l4 Turbo For Automatic Transmission
2017 Audi A5 Quattro Convertible 2.0L l4 Turbo For Vehicles With Production date Up To 07/30/18
2017 Audi A5 Quattro Coupe 2.0L l4 Turbo For Vehicles With Production date Up To 07/30/18
2018 Audi A4 Sedan 2.0L l4 Turbo For Automatic Transmission
2018 Audi A4 Quattro Sedan 2.0L l4 Turbo For Automatic Transmission
2018 Audi A5 Quattro Convertible 2.0L l4 Turbo
2018 Audi A5 Quattro Coupe 2.0L l4 Turbo
2018 Audi A5 Hatchback 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission
2019 Audi A4 Sedan 2.0L l4 Turbo For Automatic Transmission
2019 Audi A4 Quattro Sedan 2.0L l4 Turbo For Automatic Transmission
2019 Audi A5 Quattro Convertible 2.0L l4 Turbo
2019 Audi A5 Quattro Coupe 2.0L l4 Turbo
2019 Audi A5 Hatchback 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission
2020 Audi A4 Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2020 Audi A4 Quattro Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2020 Audi A5 Quattro Convertible 2.0L l4 Turbo For Vehicles with Production Date After 07/30/18
2020 Audi A5 Quattro Coupe 2.0L l4 Turbo For Vehicles with Production Date After 07/30/18
2020 Audi A5 Hatchback 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2021 Audi A4 Quattro Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2021 Audi A5 Quattro Convertible 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2021 Audi A5 Quattro Coupe 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2021 Audi A5 Hatchback 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2022 Audi A4 Quattro Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2022 Audi A5 Quattro Convertible 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2022 Audi A5 Quattro Coupe 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2022 Audi A5 Hatchback 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2023 Audi A4 Quattro Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2023 Audi A5 Quattro Convertible 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2023 Audi A5 Quattro Coupe 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2023 Audi A5 Hatchback 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2024 Audi A4 Quattro Sedan 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2024 Audi A5 Quattro Convertible 2.0L l4 Turbo For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2024 Audi A5 Quattro Coupe 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission; For Vehicles with Production Date After 07/30/18
2024 Audi A5 Hatchback 2.0L l4 Turbo For Manual Transmission; For Automatic Transmission; For Vehicles with Production Date After 07/30/18

Ask a parts specialist

Asking about: Coolant Reservoir Hose / Line 8W0121081AN · OEM #8W0121081AN