4F0 145 804 K
Charge Air Cooler – 4F0 145 804 K
Charge Air Cooler for the Audi A6 (C6) platform, OE number 4F0 145 804 K. Main group 145 sub-group 804 identifies this as a charge air cooler. Revision index K. Cooling capacity and mounting differ between engine variants on the same platform — confirm against your engine code before ordering.
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Technical specifications
| Part Number | 4F0 145 804 K |
| SKU | AUD-4F0145804K |
| Brand | |
| Category | Intercoolers |
Shipping & returns
Standard shipping
3–5 business days. Free on orders over $150.
Express delivery
Order before 2 PM for next business day delivery.
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Return unused parts within 30 days for a full refund.
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We ship worldwide. Duties may apply at destination.
Customer reviews
Verified feedback from Audi owners and independent workshops.
4.5
8 reviews
Greta Ferreira
July 28, 2026
Temps back to normal
Fitted to my 2023 A6 C8. The plastic feels substantial rather than the brittle stuff that cracks at the neck. I bled it through the proper procedure and it has held level ever since. Result is intake temps dropped noticeably on a long motorway pull. Good value against the dealer price.
Rebecca Rahman
May 9, 2026
Solved my overheating
Bought for a 2022 Q7 4M. The end tanks are properly crimped with clean seams all the way round. All the mounting points and hose stubs lined up without any persuasion. Result is no more creeping temperature when towing. No complaints at all.
Hugo Whitfield
January 3, 2026
Straight swap
Went on my A3 8P 1.4 TFSI at 119k miles. The plastic feels substantial rather than the brittle stuff that cracks at the neck. Front end off, old one out, this one in over a long Saturday. Result is the gauge sits dead centre now even in traffic on a hot day. Good value against the dealer price.
Owen Marchetti
December 7, 2025
Straight swap (A8 D4)
Cross-referenced the OE number against my 2016 A8 D4 before ordering. The end tanks are properly crimped with clean seams all the way round. I flushed the system properly and refilled with the correct G13 before bleeding. Result is no more creeping temperature when towing. Good value against the dealer price.
Tobias Okonkwo
November 19, 2025
Holds pressure beautifully
Bought for a 2017 A5 F5. I pressure tested it to 1.4 bar before fitting and it held without a drop. Front end off, old one out, this one in over a long Saturday. Result is no more creeping temperature when towing. No complaints at all.
Hannah Kaur
July 5, 2025
Seeped from the end tank
Ordered this for my A8 D4 after the original gave up at 113k. A weep appeared at the end tank seam after a few heat cycles. I flushed the system properly and refilled with the correct G13 before bleeding. Expected better given the cost.
Elena Mensah
March 25, 2025
Better core than the original
Bought for a 2021 A6 C8. I flushed the system properly and refilled with the correct G13 before bleeding. The core is thicker than the unit it replaced and the fin density is noticeably higher. Result is the gauge sits dead centre now even in traffic on a hot day. Delivery was quick too.
Oscar Okonkwo
March 14, 2025
Perfect fit, no modification
Ordered this for my A4 B8 after the original gave up at 62k. The end tanks are properly crimped with clean seams all the way round. I bled it through the proper procedure and it has held level ever since. Result is intake temps dropped noticeably on a long motorway pull.