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GENUINE VW/AUDI Expansion Tank Hose - 4G0-121-081 EJ

Genuine Vw/Audi Expansion Tank Hose 4 G0 121 081 Ej

GENUINE VW/AUDI
Availability:
5+ in stock, ready to be shipped

Ships same or next business day

SKU 4G0-121-081 EJ
$45.44 - $45.44
$45.44
$45.44 - $45.44
$45.44
CALIFORNIA WARNING

Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, which can cause cancer and reproductive harm. To minimize exposure, service the vehicle in a well-ventilated area, wear gloves, and wash your hands. For more information see www.P65Warnings.ca.gov/motor-vehicle-parts.

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GENUINE VW/AUDI

Expansion Tank Hose

This product also goes by these part numbers: 4G0 121 081 EJ, 4G0121081EJ, 4G0-121-081 EJ

This part also goes by the following cross reference.

Cross Reference Part Number: 4G0121081EJ

Fits These Vehicles 2 applications
Audi
Make Model Engine Years
Audi A6 Quattro 2014–2018
Audi A7 Quattro 2014–2018

Fitment data last updated: 2026-07-19

Fits 2 vehicle applications Check vehicle fitment before ordering View fitment

About this Coolant Hose

The GENUINE VW/AUDI 4G0-121-081 EJ coolant hose carries coolant between the engine, radiator, heater core or expansion tank. Hoses age from heat and pressure, and a single failed hose can empty the cooling system and overheat the engine within minutes.

Frequently asked questions

What are the signs of a failing coolant hose?

Coolant drips or dried coolant residue, a sweet smell, a hose that feels soft, swollen or cracked, a low-coolant warning, or rising engine temperature. Squeeze hoses when the engine is cold: a healthy hose feels firm but flexible.

What should I replace along with the hose?

Replace any clamps, O-rings or seals at the connections. Many European cars use plastic quick-connect fittings that become brittle with age, so inspect neighbouring hoses and fittings while the system is drained.

What coolant should I use?

Use the coolant type your car's manufacturer specifies, mixed to the correct ratio. Mixing incompatible coolants can cause deposits and reduce protection.

Can I replace a coolant hose myself?

Usually, yes. Let the engine cool completely before opening the system, catch and dispose of old coolant properly, and bleed the air out of the system afterwards following your car's procedure; trapped air can cause overheating.

How do I make sure this coolant hose fits my car?

Compare the part numbers listed on this page with the number on your old part or in your vehicle's parts catalog, and check the fitment information. If you are unsure, contact us with your VIN before ordering.

Euromotiv is an independent retailer of OEM, Genuine, and aftermarket automotive parts. We are not affiliated with, endorsed by, or authorized by Audi AG, Volkswagen AG, BMW AG, Mercedes-Benz Group AG, Dr. Ing. h.c. F. Porsche AG, MINI, or any other vehicle manufacturer. All trademarks, logos, and brand names are the property of their respective owners and are used solely for identification and compatibility purposes.