Coolant Pipe / Engine Cooling System Metal Mainline – 06M121071L

Original rigid cooling system mainline pipe (metal coolant supply line for the engine block and accessories), designed for Audi A7 Sportback (4K / 4K8 generation) and Audi A6 C8 (4K2 / 4K5 / 4KA type) with 3.0 V6 TFSI turbocharged petrol engines (55 TFSI designation / EA839 family / DLZA, DKMB, and related codes) based on the modular MLBevo longitudinal platform.

Original VAG cooling system component. Made of precision-bent, high-grade steel pipe protected by an oven-baked anti-corrosion coating, equipped with integrated factory connection flanges and welded mounting brackets. It is completely resistant to extreme temperatures in the immediate vicinity of the cylinder heads and turbocharging system, high operating pressures, and prolonged exposure to engine coolants (G12evo / G13). It ensures rigid, reliable coolant transfer in the main 3.0 V6 engine circuit, eliminating the risk of thermal deformation typical of plastic components.

Technical specifications:

• OE part number: 06M121071L / 06M 121 071 L (interchangeable with revision numbers 06M121071, 06M121071F, 06M121071J)

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

• Function: Rigid coolant supply line / V6 engine coolant circulation pipe (Coolant Hardline)

• Dedicated engine: 3.0 V6 TFSI (55 TFSI / EA839 family) and related 2.9 V6 TFSI units (S6 / S7 / RS4 / RS5)

• Construction: Pressure-profiled metal with factory flanges for O-rings and integrated screw mounting points

• Installation side: Engine compartment – directly adjacent to the block / accessories of the 3.0 V6 TFSI unit

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

• Condition: Original used part (100% functional, leak-free, unobstructed, without cracks or dents, factory paint coating intact, mounting flanges straight, O-ring surfaces smooth and free from corrosion pitting)

• Manufacturer: Audi AG / VAG (Original OEM)

Main application:

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

  • A8 / S8 (4N2 / 4N8 - D5 type) – 3.0 TFSI (55 TFSI) engines

  • Q7 / Q8 (4M / 4MN type) – versions with 3.0 TFSI (55 TFSI) unit

  • Porsche: Cayenne / Panamera (9YA / 971 type) – 3.0 V6 Turbo (EA839) engines

Fitment guarantee and VIN verification

Each pipe undergoes a flow test, flange inspection, and pressure leak test before shipping.

Fitment / installation note: The initial 06M designation assigns the component directly to the EA839 family engine block. Rigid metal pipes are key coolant supply lines for the engine – the original OEM geometry ensures a perfect fit into the block holes without any stress on the seals. It is recommended to install new factory O-rings before reassembly. Before purchase, we recommend comparing the full OE number with the suffix (L) marked on the pipe body or verifying it using the vehicle's VIN