Fuel Line Tube 4G0201227 Audi A7 4K C8 A6 3.0 TFSI 55 TFSI OE Hose

Fuel Rail Hose / Vent Hose – 4G0201227

Original fuel system hose (fuel return / fuel vapor vent line or fuel rail supply section with factory SAE/VDA quick-release couplings), designed for Audi A7 Sportback (4K / 4K8 generation) and Audi A6 C8 (4K2 / 4K5 / 4KA type) produced from 2018 to 2026, equipped with a turbocharged 3.0 V6 TFSI (55 TFSI trade designation, DLZA / DKMB engine code) mild hybrid system (MHEV 48V), based on the modular longitudinal MLBevo platform.

Original VAG fuel system component. Made of multilayer polyamide (PA) with enhanced thermal resistance and reduced hydrocarbon permeability, working with reinforced rubber sections that dampen powertrain vibrations. It ensures precise, safe, and 100% leak-proof routing of fuel and vapors in the engine compartment and bulkhead area, eliminating the risk of leaks, pressure drops in the fuel supply system, and fuel odors penetrating the cabin.

Technical specifications:

• Catalog part number (OE): 4G0201227 / 4G0 201 227 (interchangeable with revisions in the 4G0201227A and 4G0201227B series); available as part of the fuel line assembly alongside hose 4G0201220)

• System / Category: Fuel supply system / Fuel, vent, and injection hoses (Fuel Return Line / Fuel Breather Hose Pipe)

• Function: Fuel hose / injection system vent line

• Powertrain: 3.0 TFSI V6 gasoline (55 TFSI, 340 hp / 250 kW)

• Material: Barrier construction material (PA) + reinforced elastomer resistant to biofuels and high temperatures

• Connectors: Original Quick-Connect snap-fit couplings with intact internal O-rings

• Mounting location: Engine compartment / bulkhead wall and longitudinal beam area

• Dedicated model: Audi A7 Sportback (4K8 type) and Audi A6 / Avant / Allroad (4K / C8 type)

• Steering side: Left (LHD – European version)

• Condition: Original used part (100% leak-proof – no cracked material, no chafing from heat shields, snap-fit locks functional and locking with an audible click)

• Manufacturer: Audi AG / VAG (OEM Original)

Main application:

• Audi:

  • A7 Sportback (4K8 type) – 3.0 55 TFSI quattro (model years 2018–2026, DLZA, DKMB codes)

  • A6 / A6 Avant / Allroad (4K / C8 type) – 3.0 55 TFSI quattro (model years 2018–2026, DLZA, DKMB codes)

Fitment guarantee and VIN verification

Every fuel hose undergoes a detailed mechanical inspection of the quick-connect housings, a check of the condition of the internal lip seals/O-rings, and washing before shipping.

Fitment / installation tip: Group 201 in the VAG catalog covers fuel tank and fuel rail accessories. Due to the high temperatures in the engine compartment of modern 3.0 V6 Turbo engines with a "hot-V" mounted turbocharger, hose materials age naturally. A cracked snap-fit end or brittle hose poses a direct fire hazard. The original OEM hose guarantees factory bending geometry, perfect fitment into the chassis clips, and absolute joint tightness. Before purchasing, we recommend comparing the OE number on the part label or verifying it using the vehicle's VIN.