United States
Product overview
Genuine OEM Audi expansion tank, part number 8W2121405N. This component serves as the reservoir for engine coolant, allowing for expansion and contraction due to temperature changes. It plays a vital role in maintaining the correct coolant level and pressure within the cooling system, preventing overheating. Constructed from robust plastic, it is designed to withstand the thermal stresses of the engine bay. Genuine OEM parts ensure the correct material composition and structural integrity for reliable cooling system performance.
Catalogue entry: CONTAINER rhd.
Technical details
- Category
- Engine Cooling
- Customs (HS) code
- 87089997
- Manufacturer
- Audi
- Product Type
- Genuine new auto parts
- Shipping size (L × W × H)
- 24.5 × 16.5 × 21 cm
- Shipping weight
- 0.86 kg
Specifications
As recorded in the manufacturer’s parts catalogue for this part number.
Equipment codes
- L0R
PR codes identify the factory option a part belongs to; your vehicle’s are listed on the data sticker in the boot well or service booklet.
Why buy from WW Spares?
- ✓ Genuine OEM inventory sourced directly from factory networks
- ✓ Fitment support from workshop-seasoned parts specialists
- ✓ Global logistics with customs-ready documentation
Need help confirming compatibility? Talk to a specialist
Parts diagram & fitment
5 vehiclesReservoir — locate 8W2121405N Audi Expansion Tank | Coolant Reservoir in the official exploded view and explore the surrounding assembly.
RThis part is the Right side
Parts in this assembly36
- 1Radiator 8W0121251H
- 2Part 4M0121095
- 3Sleeve 7P0121365
- 4Grommet 7P0121276
- 5Rubber Bush 4M0121275A
- 6Rubber Bush 4M0121268A
- 7Bolt 8K0805399B
- 8Coupl Piece 8W0122293DL
- 8Part 4D0133335
- 10Cooler 4M0145804BH
- 15Radiator 8W0121002
- 16Bolt WHT005232
- 20Radiator 8W0121212F
- 20Radiator 8W0121212G
- 21Bracket 8W0121262D
- 22Rubber Bush 4D0317867A
- 23Air Guide 8W0121699
- 24Radiator 8W0121202A
- 24Radiator 8W0121202
- 26Bolt N10009102
- 27Bracket 8W0121240
- 28Screw N91199801
- 28Collar Nut N10340103
- 29Collar Nut N01508210
- 30ContainerLeft8W1121405J
- 30ContainerLeft8W1121405K
- 30ContainerLeft8W1121405N
- 30ContainerRight8W2121405H
- 30ContainerRight8W2121405J
- 30ContainerRight8W2121405K
- 30ContainerLeft8W1121405F
- 31Part 4M0121321Q
- 31Part 4M0121321K
- 32RetainerRight8W2121232G
- 32RetainerLeft8W1121232E
- 34Screw WHT003841
Vehicle fitment table5
Europe (5)
| Vehicle | Years | Pos. | Qty | PR |
|---|---|---|---|---|
| Audi RS4 Avant | 2017- | 30 | 1 | L0R |
| Audi RS5 Sportback | 2017- | 30 | 1 | L0R |
| Audi A5 Sportback | 2016-2020 | 17, 20 | 1 | L0R |
| Audi A5 Cabrio 2.0 | 2016-2018 | 17, 20 | 1 | L0R |
| audi a4 2.0 | 2015-2019 | 17, 20 | 1 | L0R |
Diagrams & fitment data powered by oemdiagrams.com
8W2121405N Audi Expansion Tank | Coolant Reservoir is fitted on: Audi RS4 Avant 2017-; Audi RS5 Sportback 2017-; Audi A5 Sportback 2016-2020; Audi A5 Cabrio 2.0 2016-2018; audi a4 2.0 2015-2019.