Radiator – 1K0 121 212 C
Radiator for the VW Group PQ35 (Golf V / A3 8P) platform, OE number 1K0 121 212 C. Main group 121 sub-group 212 identifies this as a radiator. Revision index C. 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 | 1K0 121 212 C |
| SKU | AUD-1K0121212C |
| Brand | |
| Category | Radiators |
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3–5 business days. Free on orders over $150.
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Customer reviews
Verified feedback from Audi owners and independent workshops.
4.4
8 reviews
Sofia Delgado
April 24, 2026
Straight swap
Bought for a 2009 TT 8J. The plastic feels substantial rather than the brittle stuff that cracks at the neck. The transmission cooler lines threaded straight in with no adapters. Result is the gauge sits dead centre now even in traffic on a hot day. Exactly what I needed.
Claire Delgado
April 13, 2026
Perfect fit, no modification
Bought for a 2018 A7 4G. 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 the coolant level has not moved in four months. Good value against the dealer price.
Freya Brandt
April 2, 2026
Solved my overheating
My A8 D4 needed this doing at 169k miles. I bled it through the proper procedure and it has held level ever since. The core is thicker than the unit it replaced and the fin density is noticeably higher. Result is intake temps dropped noticeably on a long motorway pull. Cannot fault it.
Bastian Nair
November 9, 2025
Temps back to normal
My Q7 4L needed this doing at 133k miles. I pressure tested it to 1.4 bar before fitting and it held without a drop. The transmission cooler lines threaded straight in with no adapters. Result is the coolant level has not moved in four months.
Daniel Bianchi
August 20, 2025
Works well, packaging was thin
Went on my RS4 B7 1.8 TFSI at 52k miles. I flushed the system properly and refilled with the correct G13 before bleeding. I pressure tested it to 1.4 bar before fitting and it held without a drop. On balance no more creeping temperature when towing. Would still buy it again.
Freya Novotny
June 25, 2025
Temps back to normal (Q3 8U)
Went on my Q3 8U 2.0 TDI at 68k miles. I flushed the system properly and refilled with the correct G13 before bleeding. I pressure tested it to 1.4 bar before fitting and it held without a drop. Result is the coolant level has not moved in four months. Happy to recommend it.
Greta Hoffmann
June 15, 2025
Holds pressure beautifully
Fitted to my 2015 A3 8V. The plastic feels substantial rather than the brittle stuff that cracks at the neck. The transmission cooler lines threaded straight in with no adapters. Result is no more creeping temperature when towing. Will be back for the other side.
Malik Ellery
June 14, 2025
Better core than the original
Fitted to my 2009 Q5 8R. The transmission cooler lines threaded straight in with no adapters. I pressure tested it to 1.4 bar before fitting and it held without a drop. Result is the coolant level has not moved in four months. Cannot fault it.