- 🚚Shipping from a supplier warehouse serving the U.S.
- 💶Import duties or taxes may apply where applicable
- ⚡Fast delivery: usually 2–3 business days (depending on the product and destination)
- 🔎Tracking after dispatch
- ↩️Returns according to our return policy (applicable terms)
- 🛡️Consumer rights according to applicable law
- 💬Support before and after purchase
- ✅ Verified offer — matches the description
- 🧾Clear description and photos
- 🧩Easy variant selection
- 📦Secure packaging
- ⭐Good “for now” choice
Coolant expansion tank for Audi and Volkswagen
Coolant expansion tank for selected Audi A4, Audi A6, and Volkswagen Passat and Passat Variant models. The product has two connections and is made of plastic.
The kit includes a reservoir and cover. Before purchasing, please compare the part number, model, engine, and appearance of the installed component. If in doubt, the manufacturer recommends professional installation.
Application
Audi A4
- Audi A4 8D2, B5: 1.6 petrol, 1.8 petrol, 1.9 diesel, 2.4 petrol and 2.6 petrol — 08.1997–11.2000.
- Audi A4 8D2, B5: 2.8 petrol — 08.1997–08.2001.
- Audi A4 Avant 8D5, B5: 1.6 petrol, 1.8 petrol, 1.9 diesel, 2.4 petrol and 2.6 petrol — 08.1997–09.2001.
- Audi A4 Avant 8D5, B5: 2.8 petrol — 08.1997–09.2001.
Audi A6
- Audi A6 4B, C5: 1.8 petrol — 01.1997–04.2001.
- Audi A6 4B, C5: 1.9 diesel - 04/1997–10/2000.
- Audi A6 4B, C5: 2.4 petrol — 02.1997–04.2001.
- Audi A6 4B, C5: 2.8 petrol — 02.1997–05.2001.
- Audi A6 Avant 4B, C5: 1.8 petrol — 12.1997–04.2001.
- Audi A6 Avant 4B, C5: 1.9 diesel - 02/1998–04/2001.
- Audi A6 Avant 4B, C5: 2.4 petrol — 12.1997–04.2001.
- Audi A6 Avant 4B, C5: 2.8 petrol — 12.1997–04.2001.
Volkswagen Passat
- VW Passat, B: 1.6 petrol, 1.8 petrol, 1.9 diesel and 2.8 petrol — 10.1996–05.2005.
- VW Passat, B: 2.0 petrol — 04.2000–05.2005.
- VW Passat, B: 2.0 diesel - 12/2003–05/2005.
- VW Passat Variant, B: 1.6 petrol, 1.9 diesel and 2.8 petrol — 06.1997–05.2005.
- VW Passat Variant, B: 1.8 petrol — 06.1997–08.2005.
- VW Passat Variant, B: 2.0 petrol — 04.2000–05.2005.
- VW Passat Variant, B: 2.0 diesel - 12/2003–05/2005.
Technical specifications
- Part type: coolant expansion tank.
- Number of connections: 2.
- Material: plastic.
- Condition: new.
Part numbers
Confirmed OEM/OE numbers: 8D0121403L, 8D0121403J, 8D0121403F, 0121403.
Additional part numbers provided in the source: 1J0121321, 1J0121321A, 1J0121321B.
Comparison number: 603-703.
Helpful information before purchasing
This offer applies to a coolant expansion tank for selected Audi A4 8D2/8D5, Audi A6 4B, and Volkswagen Passat and Passat Variant models. Compatibility must be confirmed by the part number, exact model, engine, year, and comparison of the installed tank.
The most important information
- Applies to selected versions of the Audi A4, Audi A6, VW Passat and VW Passat Variant from 1996–2005.
- The tank has 2 connections.
- Material: plastic.
- Confirmed OEM/OE numbers: 8D0121403L, 8D0121403J, 8D0121403F and 0121403.
- The reference number 603-703 is used for additional product identification.
Contents of the set
- 1 × coolant expansion tank
- 1 × cover
Frequently asked questions
How do I check if a part fits?
Compare the part number, exact vehicle model, engine version, year, and the appearance and number of connections of the installed tank. If in doubt, have the VIN, detailed vehicle model, part number, and a photo of the existing component ready.
Is the product ready for assembly?
The source recommends professional installation. Before installation, confirm part compatibility with your vehicle.
Does the offer include a complete set?
The scope of the offer includes an expansion tank and a cover, in accordance with the specified kit contents.
Why is it worth buying from Multigenus?
- Ships from European warehouse for selected offers
- Final price within the EU, excluding customs and import surcharges
- 14 days to return in accordance with EU law
- Pre- and post-purchase support
- The product is described in a way that makes it easier to choose the right variant
Local order fulfillment
Regional fulfillment for more efficient delivery
Selected products can be shipped from our suppliers’ regional warehouses in Europe and the USA.
Supplier warehouses in Europe
including Germany · Netherlands · Poland
France · Spain · Italy
Supplier warehouses in the USA
Local fulfillment of selected products for customers in the United States.
International delivery
26 markets served.
Shipping availability depends on the destination country and product.