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Water Hose 4K0122055BJ Audi A6 A7 4K C8 3.0 TFSI 55 TFSI
  • Water Hose 4K0122055BJ Audi A6 A7 4K C8 3.0 TFSI 55 TFSI
  • Water Hose 4K0122055BJ Audi A6 A7 4K C8 3.0 TFSI 55 TFSI
Water Hose 4K0122055BJ Audi A6 A7 4K C8 3.0 TFSI 55 TFSI
200,00 zł

Coolant Hose / Engine Cooling System Water Hose – 4K0122055BJ

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

Original VAG cooling system component. Made of high-quality elastomer (EPDM rubber with high-density woven textile reinforcement) combined with molded technical plastic fittings. Resistant to high operating pressure, aggressive glycol action (G12evo / G13 coolant), thermal aging, and extreme temperatures in the engine bay. It is responsible for the direct flow of coolant between the 3.0 V6 engine block and the radiator system, dampening power unit vibrations and ensuring stable engine cooling under full load.

Technical specifications:

  • OE part number: 4K0122055BJ / 4K0 122 055 BJ (interchangeable with series numbers 4K0122055, 4K0122055AD, 4K0122055BA, 4K0122055BG)

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

  • Function: Flexible water hose / engine radiator hose (Engine Coolant Hose)

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

  • Construction: Reinforced EPDM rubber hose with factory quick-release connectors (Quick-Connector) and O-ring seals

  • Installation side: Engine compartment – front / radiator and engine area

  • Steering side: Left (LHD – European version) and Right (RHD) – universal component

  • Condition: Original used part (100% functional, leak-tight, flexible rubber, no brittle areas, no cracks, no bulges or cuts, quick-connector sockets intact, locking pins functional)

  • Manufacturer: Audi AG / VAG (OEM Original)

Main applications:

  • Audi:

    • A7 Sportback (4K8 type) – model years 2018 to 2026 (3.0 TFSI / 55 TFSI engines)

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

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

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

    • A8 / S8 (4N2 / 4N8 - D5 type) – selected versions with the 3.0 V6 TFSI engine

    • Q7 / Q8 (4M / 4MN type) – selected versions with the 3.0 TFSI engine

Fitment guarantee and VIN verification

Every hose undergoes pressure leak testing and connector condition inspection before shipping.

Fitment / installation tip: The 122 group designation covers the main flexible coolant hoses. Using the original OEM hose with factory quick-release connectors guarantees ideal bend profiling (no flow-restricting kinks) and a tight snap-fit into the radiator and engine fittings. Before purchase, we recommend comparing the full OE number with the index (BJ) on the band or sticker on the old hose, or verifying fitment using the vehicle's VIN.

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