2019-2026 Audi Auxiliary Coolant / Water Pump 4N0121601A

OEM Part #: 4N0-121-601-A (4N0121601A)

$99.99
Used
Donor2021 Audi SQ8 · 4.0L · 47k miles
SKU: 701420 · 30-Day Returns
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Auxiliary Coolant / Water Pump 4N0121601A — Used (SKU 701420)
Genuine OEM Used SKU: 701420 Donor Vehicle: 2021 Audi SQ8 · 4.0L · 47k miles 2 photos
$99.99
30-Day Returns
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A used genuine OEM Audi auxiliary coolant/water pump, part number 4N0121601A, is a secondary pump that circulates coolant through the heater core and other thermal management circuits after the engine is shut off. This component supports the 4.0L V8 MHEV (mild hybrid) turbocharged engines, including the EA825 family found in the S8 and RS6 Avant. When this pump fails, you may notice reduced cabin heat output or a coolant temperature warning during stop-start cycles.

Specifications

Specifications for Auxiliary Coolant / Water Pump 4N0121601A
Fits Vehicle ModelA8, RS6, RS7, S8, SQ7, SQ8
Fits Vehicle MakeAudi
OEM Part No4N0-121-601-A (4N0121601A)
CategoryRadiator / Coolant

Compatible Vehicles

Fits 33 vehicle configurations across 1 make, 2019-2026.

Check your specific vehicle before ordering. This list shows year, make, and model. Some years have multiple trims or engines that use different parts, and individual listings may have additional fitment notes (e.g. “with sunroof only”). Review the full variant list below, or message us with your VIN and we’ll confirm the match.

Audi

  • A8 2019-2021 · 3 variants
  • RS6 2021-2025 · 6 variants 6 with notes
  • RS7 2021-2026 · 6 variants 6 with notes
  • S8 2020-2025 · 6 variants 1 with note
  • SQ7 2020-2025 · 6 variants 6 with notes
  • SQ8 2020-2025 · 6 variants 6 with notes
View all 33 vehicle configurations — 25 with fitment notes
Full vehicle fitment list for Auxiliary Coolant / Water Pump 4N0121601A
Year Make Model Trim Engine Note
2025 Audi S8 Sedan 4.0L V8 Turbo ATF Cooling
2023 Audi RS6 Wagon Wagon 4.0L V8 Turbo ATF Cooling
2023 Audi RS7 Hatchback 4.0L V8 Turbo ATF Cooling
2022 Audi RS7 Hatchback 4.0L V8 Turbo ATF Cooling
2022 Audi SQ7 SUV 4.0L V8 Turbo ATF Cooling
2025 Audi SQ8 SUV 4.0L V8 Turbo ATF Cooling
2025 Audi SQ7 SUV 4.0L V8 Turbo ATF Cooling
2023 Audi SQ7 SUV 4.0L V8 Turbo ATF Cooling
2025 Audi RS6 Wagon Wagon 4.0L V8 Turbo ATF Cooling
2025 Audi RS6 Wagon GT Wagon 4.0L V8 Turbo ATF Cooling
2025 Audi RS7 Hatchback 4.0L V8 Turbo ATF Cooling
2020 Audi SQ7 SUV 4.0L V8 Turbo ATF Cooling
2021 Audi RS6 Wagon Wagon 4.0L V8 Turbo ATF Cooling
2023 Audi SQ8 SUV 4.0L V8 Turbo ATF Cooling
2026 Audi RS7 Hatchback 4.0L V8 Turbo Pump, TRANSMISSION COOLER
2024 Audi RS6 Wagon Wagon 4.0L V8 Turbo ATF Cooling
2024 Audi RS7 Hatchback 4.0L V8 Turbo ATF Cooling
2022 Audi SQ8 SUV 4.0L V8 Turbo ATF Cooling
2022 Audi RS6 Wagon Wagon 4.0L V8 Turbo ATF Cooling
2021 Audi RS7 Hatchback 4.0L V8 Turbo ATF Cooling
2021 Audi SQ8 SUV 4.0L V8 Turbo ATF Cooling
2021 Audi SQ7 SUV 4.0L V8 Turbo ATF Cooling
2020 Audi SQ8 SUV 4.0L V8 Turbo ATF Cooling
2024 Audi SQ8 SUV 4.0L V8 Turbo ATF Cooling
2024 Audi SQ7 SUV 4.0L V8 Turbo ATF Cooling
2022 Audi S8 Sedan 4.0L V8 Turbo
2021 Audi S8 Sedan 4.0L V8 Turbo
2020 Audi A8 Quattro L Sedan 4.0L V8 Turbo
2019 Audi A8 Quattro L Sedan 4.0L V8 Turbo
2020 Audi S8 Sedan 4.0L V8 Turbo
2021 Audi A8 Quattro L Sedan 4.0L V8 Turbo
2024 Audi S8 Sedan 4.0L V8 Turbo
2023 Audi S8 Sedan 4.0L V8 Turbo

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