United States
Target · Diagram
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Number 23 marks the part’s position in the exploded view.
Product overview
Genuine OEM Volkswagen Coolant Expansion Tank, part number 1S0121407J. This component stores and pressurizes engine coolant, accommodating expansion and contraction due to temperature changes to maintain optimal system pressure. It is located at position 9 in the diagram, within the engine bay. Typically made of durable plastic, it includes connections for hoses and a pressure cap. Genuine OEM expansion tanks are designed with precise material specifications and sealing surfaces to prevent leaks and ensure long-term reliability.
Catalogue entry: TANK.
Technical details
- Category
- Engine Cooling
- Customs (HS) code
- 87089997
- Manufacturer
- Volkswagen
- Product Type
- Genuine new auto parts
- Shipping size (L × W × H)
- 17.5 × 15.5 × 14.5 cm
- Shipping weight
- 0.17 kg
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
6 vehiclesCoolant Expansion Tank — locate 1S0121407J Volkswagen Coolant Expansion Tank | Genuine OEM in the official exploded view and explore the surrounding assembly.
Parts in this assembly30
- 4Radiator 5Q0121251GR
- 5Radiator 5WA121251J
- 6Bolt N90817003
- 7Air GuideLeft5NA121283BB
- 7Air GuideLeft5NA121283BC
- 8Air GuideRight5NA121284AL
- 8Air GuideRight5NA121284AP
- 10Radiator 5WA121251M
- 12Seal Strip 5NA121331C
- 12Seal Strip 5NA121331E
- 13Seal Strip 5NA121332D
- 13Seal Strip 5NA121332E
- 14Cover 5NA121341K
- 14Cover 5NA121341P
- 14Cover 5NA121330D
- 15Rubber Bush 5Q0121367G
- 16Bush 1K0121367F
- 17Bolt N90972201
- 18Sealing 5Q0121809A
- 19Cover 5Q0121184
- 20Container 5Q0121407P
- 21Cover 2Q0121321A
- 22Seal Ring 1H0121687A
- 24Retainer 5Q0121093DH
- 25Collar Nut N01508210
- 26Coolant G12E050A2
- 26Coolant G12E050A8
- 26Coolant G12E050A9
- 26Coolant G12E100A8
- 26Coolant G12E100A9
Vehicle fitment table6
Europe (5)
| Vehicle | Years | Pos. | Qty |
|---|---|---|---|
| Tiguan 2.0 4Motion | 2016-2024 | 23 | 1 |
| up! 1.0 BlueMotion | 2016-2023 | 2 | 1 |
| e-up! | 2016-2023 | 9 | 1 |
| golf 2.0 | 2016-2020 | 23 | 1 |
| Audi A3 Sportback | 2012-2016 | 30 |
Other markets (1)
| Vehicle | Years | Pos. | Qty |
|---|---|---|---|
| up! 1.0 TSI | 2017-2021 | 2 | 1 |
Diagrams & fitment data powered by oemdiagrams.com
1S0121407J Volkswagen Coolant Expansion Tank | Genuine OEM is fitted on: Tiguan 2.0 4Motion 2016-2024; up! 1.0 BlueMotion 2016-2023; e-up! 2016-2023; golf 2.0 2016-2020; Audi A3 Sportback 2012-2016; up! 1.0 TSI 2017-2021.
