Audi A4/A5 Coolant Reservoir / Tank / Bottle 8W0121405F

OEM Part #: 8W0-121-405-F (8W0121405F)

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

Enhance your Audi's cooling system with this genuine Coolant Reservoir (OEM Part Number: 8W0121405F). Engineered specifically for models like the 2017-2021 Audi A4, A4 Quattro, A5, and A5 Sportback, this expansion tank plays a critical role in maintaining optimal coolant levels and engine temperature. Positioned strategically within the engine bay, it helps prevent overheating, allowing your vehicle to perform efficiently. If you're experiencing issues such as leaks or a malfunctioning reservoir, this OEM replacement will restore functionality and peace of mind. Compatible with various engine configurations, including the 2.0L L4 Gas variants, this part ensures you're using only authentic components sourced from donor vehicles.

Specifications

Specifications for Coolant Reservoir / Tank / Bottle 8W0121405F
Fits Vehicle ModelA4, A5
Fits Vehicle MakeAudi
OEM Part No8W0-121-405-F (8W0121405F)
Compatible OEM Part No 8W0-121-405-E
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
  • A5 2017-2020 · 11 variants
View all 19 vehicle configurations
Full vehicle fitment list for Coolant Reservoir / Tank / Bottle 8W0121405F
Year Make Model Trim Engine Note
2017 Audi A4 Sedan 2.0L l4 Turbo
2017 Audi A4 Quattro Sedan 2.0L l4 Turbo
2017 Audi A5 Quattro Convertible 2.0L l4 Turbo
2017 Audi A5 Quattro Coupe 2.0L l4 Turbo
2018 Audi A4 Sedan 2.0L l4 Turbo
2018 Audi A4 Quattro Sedan 2.0L l4 Turbo
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
2019 Audi A4 Sedan 2.0L l4 Turbo
2019 Audi A4 Quattro Sedan 2.0L l4 Turbo
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
2020 Audi A4 Sedan 2.0L l4 Turbo
2020 Audi A4 Quattro Sedan 2.0L l4 Turbo
2020 Audi A5 Quattro Convertible 2.0L l4 Turbo
2020 Audi A5 Quattro Coupe 2.0L l4 Turbo
2020 Audi A5 Hatchback 2.0L l4 Turbo

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