Coolant reservoir AUDI A6 2008

OEM: 4F0121403

Disassembled car photo

Engine running

  • Tested before shipping
  • Guaranteed quality
  • Fast delivery 3–7 days
  • 14-day returns

Details for this exact part

Code
4F0121403
OEM
4F0121403
Condition
Used
Availability
1 in stock - ready to ship
Make, model
AUDI A6 2004-2008
Year
2009
Engine
Petrol 2.0L 125KW - BPJ
VIN
WAUZZZ4F69N017477

What is this part and why does it matter?

The coolant reservoir (expansion or overflow tank) stores excess coolant as it expands with heat and provides a low-pressure point to check coolant level safely.

Have a question about this product?

Message us on WhatsApp!

Working hours: Mon–Fri 9:00–18:00

WhatsAppWhatsAppAsk about this product

Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

  • Coolant leak or crack visible on the tank
  • Coolant level dropping consistently despite no visible leak elsewhere
  • Cap not sealing properly

Installation information

Bolts or clips into place, connected with a hose to the radiator or engine — always refill to the correct level marked on the tank.

Frequently asked questions

Most often from age and heat cycling making the plastic brittle, or from the cap seal failing and letting pressure build unevenly.

Donor vehicle description

VIN
WAUZZZ4F69N017477
Make, model
Audi A6
Year
2009
Engine
Petrol 2.0L 125KW - BPJ
Transmission
Automatic - KYQ
Drive
Front
Equipment
LHD
Colour
9X / Y1Q

455 parts from this car

  • Rear bumper AUDI A6 2008
  • Steering gear AUDI A6 2008
  • Front left axle shaft AUDI A6 2008
  • Front right axle shaft AUDI A6 2008
  • Air filter housing AUDI A6 2008
  • Automatic transmission AUDI A6 2008
  • Clutch damper AUDI A6 2008
  • Engine AUDI A6 2008
  • Front Left Inner Fender AUDI A6 2008
  • Front Right Inner Fender AUDI A6 2008
  • Rear Left Inner Fender AUDI A6 2008
  • Inner fender, rear right AUDI A6 2008

What our customers say

  • Price: excellent.

    D
    Didier V.
    August 2026

  • Super good! They came through with the part I needed, quickly and at a fair price! Thanks, and I definitely recommend!

    I
    Ilmars K.
    August 2026

  • I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.

    A
    Aleksandr L.
    Toyota Avensis
    August 2026

  • No complaints about Evro Trans itself, everything's fine. But the delivery..... It felt like the order was being carried by turtles. 4 days from Riga to Daugavpils. Judging by the tracking, the parcel just sat somewhere behind a shed for 3 days, then they found it and delivered it the next day. I think that's why I won't be ordering there again.

    P
    Paul F.
    June 2026

  • Super fast delivery of the part, and good quality of the used part. Thanks for the service.

    N
    Natālija I.
    May 2026

  • I ordered antifreeze heaters and an auxiliary pump. Everything arrived quickly, the very next day, and matched the description. I'm satisfied.

    J
    Juris J.
    February 2026

  • Excellent service, timely delivery, and complete transparency at every step. I highly recommend EvroTrans to anyone looking for a reliable partner!

    E
    Egor S.
    November 2025

  • Bought a front fender for my car. I liked it! After payment they sent more than 20 photos of the problem areas, and it was packed very securely - took a while to unwrap.

    I
    Igors K.
    Front fender
    October 2025