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Number 20 marks the part’s position in this exploded view (Volkswagen Phaeton 4motion (2010-2016)).
Other diagrams in the gallery may use a different number for the same part.
Product overview
Genuine OEM Audi Coolant Expansion Tank, part number 3D0121407J. This essential component holds excess coolant and allows for expansion and contraction within the engine cooling system, ensuring proper fluid levels and pressure regulation. It is typically located in the engine bay, connected to the radiator and engine. Weighing 1.31 kg and measuring 0.3m x 0.29m x 0.175m, this tank is designed for precise fitment. Choosing a genuine OEM expansion tank ensures correct material composition and pressure resistance, preventing leaks and maintaining the integrity of the cooling system.
Technical details
- Category
- Engine Cooling
- Country of origin
- Italy
- Customs (HS) code
- 87089997
- Manufacturer
- Audi
- Product Type
- Genuine new auto parts
- Shipping size (L × W × H)
- 30 × 29 × 17.5 cm
- Shipping weight
- 1.31 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
Replaces older part numbers
This is the current manufacturer number. Older numbers on this road are no longer supplied.
- 3D0121407DNot stocked
Sep 2010 - 3D0121407JThis pageCurrent number
