Coolant Pipe / Engine Cooling System Main Line – 06M121075S

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

Original VAG cooling system component. Made of high-grade metal alloy protected by an anti-corrosion coating and integrated with reinforced elastomeric fittings with enhanced thermo-mechanical resistance. Designed for continuous operation under high working pressure, extreme engine bay temperatures, and direct contact with coolant (G12evo / G13). It ensures a rigid, safe flow of coolant in critical areas of the engine block and thermal accessories, protecting the 3.0 V6 power unit from overheating and ensuring stable coolant circulation.

Technical specifications:

• Catalog part number (OE): 06M121075S / 06M 121 075 S (interchangeable with revisions in the 06M121075, 06M121075F, 06M121075M, 06M121075R series)

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

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

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

• Construction: Pressure-formed pipe with factory connection flanges, mounting tabs for bolts, and O-ring sealing seats

• Mounting side: Engine compartment – directly adjacent to the chassis / 3.0 V6 power unit accessories

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

• Condition: Original used part (100% functional, leak-free, unobstructed, without cracks or dents, mounting flanges flat, O-ring sealing surfaces clean and free from corrosion pitting)

• Manufacturer: Audi AG / VAG (OEM Original)

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) engine

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

Fitment guarantee and VIN verification

Each pipe undergoes sealing surface geometry verification, obstruction check, and pressure leak testing before shipping.

Fitment / installation note: The initial 06M designation assigns the component directly to the chassis and accessories of VAG V6 petrol engines (EA839). Using the original OEM pipe ensures ideal routing geometry in the tight engine bay without the risk of rubbing against adjacent components. It is recommended to install new factory O-ring seals before installation. Before purchasing, we recommend comparing the full OE number with the (S) suffix on the part body or verifying fitment using the vehicle's VIN.