Heating and Cooling› Radiators

Audi Genuine Parts

Auxiliary Radiator

$791.66

SKU: 4K0121002

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Audi Auxiliary Radiator is a direct replacement part for your vehicle's cooling system.
Show original supplier description
The Audi Auxiliary Radiator, part number 4K0121002, is a genuine Audi component designed to maintain your vehicle's optimal operating temperature. This radiator serves as an auxiliary unit within the cooling system, working to dissipate heat from the coolant as it passes through its fins. Radiators can fail due to cracked end tanks, leaks, or internal clogs caused by debris, which can lead to overheating. If your current radiator shows signs of damage, such as bent or clogged fins, or any leaks, replacement is recommended to ensure effective heat exchange. This auxiliary radiator is specifically designed for Audi RS6 Avant and RS7 Sportback models equipped with the 4.0L V8 Electric/Gas engine. It is compatible with model years ranging from 2021 through 2026, including various trims such as Base, GT, and Performance, depending on the specific year. When replacing your radiator, it is also advisable to inspect or replace the upper and lower radiator hoses to ensure the integrity of the entire cooling system.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandAudi Genuine Parts
Part Number4K0121002
CategoryHeating and Cooling

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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