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Water Hose 4K1121123A Audi A6 A7 4K C8 3.0 TFSI 55 TFSI Cooling OE
  • Water Hose 4K1121123A Audi A6 A7 4K C8 3.0 TFSI 55 TFSI Cooling OE
  • Water Hose 4K1121123A Audi A6 A7 4K C8 3.0 TFSI 55 TFSI Cooling OE
Water Hose 4K1121123A Audi A6 A7 4K C8 3.0 TFSI 55 TFSI Cooling OE
70,00 zł

Coolant Hose / Engine Cooling System Water Hose – 4K1121123A

Original cooling system hose (water hose for the engine and thermal accessories cooling circuit), designed for Audi A7 Sportback (4K / 4K8 generation) and Audi A6 C8 (4K2 / 4K5 / 4KA type) with a turbocharged petrol engine 3.0 V6 TFSI (55 TFSI designation / EA839 family / DLZA, DKMB and related codes) based on the modular longitudinal platform MLBevo.

Original VAG cooling system component. Made of high-quality elastomer (reinforced EPDM rubber with a dense textile braid) resistant to continuous operating pressure, aggressive glycol (G12evo / G13 coolant), thermal aging, and extreme temperatures in the inline engine compartment. It ensures the direct and safe flow of coolant in the engine compartment, compensates for powertrain vibrations, and maintains stable cooling system operating parameters under full load.

Technical specifications:

  • Catalog part number (OE): 4K1121123A / 4K1 121 123 A (interchangeable with series numbers 4K1121123)

  • System / Category: Engine cooling system (Engine Cooling System / Coolant Hose)

  • Function: Flexible coolant hose / V6 engine water hose

  • Dedicated engine: 3.0 V6 TFSI (55 TFSI / EA839) and related V6 petrol engines on the MLBevo platform

  • Construction: Reinforced EPDM elastomer hose with factory quick-connect fittings (Quick-Connector) and O-ring seals

  • Installation side: Engine compartment – powertrain cooling accessories area

  • Steering side: Left (LHD – European version, code designation 4K1)

  • Condition: Original used part (100% functional, leak-free, pressure tested – rubber is flexible and soft, without cracks, bulges, or cuts, quick-connector sockets are intact, locking tabs are functional)

  • Manufacturer: Audi AG / VAG (Original OEM)

Main application:

  • Audi:

    • A7 Sportback (type 4K8) – model years 2018 to 2026 (3.0 TFSI / 55 TFSI engines – LHD versions with left-hand drive)

    • S7 Sportback (type 4K8) – model years 2019 to 2026 (2.9 TFSI engines)

    • A6 / A6 Avant / Allroad (type 4K2 / 4K5 / 4KA - C8) – model years 2018 to 2026 (3.0 TFSI / 55 TFSI engines)

    • S6 Avant / Sedan (type 4K - C8) – model years 2019 to 2026 (2.9 TFSI engines)

Fitment guarantee and VIN verification

Every hose undergoes a pressure leak test and quick-connector condition check before shipping.

Fitment / installation note: The 4K1 designation indicates a geometry designed for left-hand drive vehicles (LHD – European market), where the hose profile is precisely tailored to clear the steering column and bulkhead accessories. Using the original OEM hose prevents kinks that restrict coolant flow and ensures a secure fit in the factory hose connections. Before purchasing, we recommend comparing the full OE number with the index (A) on the hose label or verifying it using the vehicle's VIN.

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