Genuine Audi Fuel System Breather Line – 4K0-201-991-BC

Keep Your Emissions and Engine Performance in Peak Condition

Is your check engine light on, or are you experiencing a rough idle? Your vehicle’s evaporative emissions (EVAP) system relies on a perfectly sealed vacuum network to route fuel vapors back to the engine. The Genuine Audi Breather Line (Part # 4K0-201-991-BC) is a factory-original replacement line designed to restore airtight integrity to your fuel ventilation system, preventing vapor leaks and keeping your vehicle running clean.

Made from premium, fuel-resistant composite materials, this OEM breather line ensures a direct fit, effortless installation, and long-lasting durability against engine heat and vibration.

Key Features & Benefits

• Genuine OEM Quality: Engineered by Audi (VAG) specifically for your vehicle. Don’t risk vacuum leaks or poor fitment with cheap aftermarket imitations.

• Perfect Factory Fit: Pre-formed to exact factory specifications for a seamless, plug-and-play installation without the need for modification.

• Fixes Common EVAP Issues: Directly replaces cracked, brittle, or leaking factory lines that cause EVAP system trouble codes (CEL), rough idling, or failed emissions tests.

• Built to Last: Manufactured with heavy-duty, heat-shielded materials designed to withstand harsh under-hood temperatures and fuel vapor exposure.

Product Specifications

• Brand: Genuine Audi / VW (VAG)

• Part Number: 4K0-201-991-BC (Alternates: 4K0201991BC, 4K0 201 991 BC)

  Audi OEM Parts Online

  
  

• Part Type: Fuel System Breather Line / Ventilation Tube

• Condition: Brand New

• Fitment Type: Direct Replacement

Vehicle Fitment

This part is specifically designed for modern modern Audi platforms, generally covering model years 2019 to 2021+.

Commonly Fits:

• Audi A6 / A6 Quattro

  Audi A6 Avant

  Audi S6 Quattro

   

• Audi A7 Sportback

   

  ⚠️ Fitment Note: Audi fuel system components vary heavily based on exact production dates, body styles, and engine codes. To ensure 100% accurate fitment, please enter your 17-digit VIN (Vehicle Identification Number) at checkout, and our team will verify it before shipping!