OVERVIEW
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
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Genuine OEM Quality: Engineered by Audi (VAG) specifically for your vehicle. Don’t risk vacuum leaks or poor fitment with cheap aftermarket imitations.
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Perfect Factory Fit: Pre-formed to exact factory specifications for a seamless, plug-and-play installation without the need for modification.
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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.
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Built to Last: Manufactured with heavy-duty, heat-shielded materials designed to withstand harsh under-hood temperatures and fuel vapor exposure.
Product Specifications
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Brand: Genuine Audi / VW (VAG)
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Part Number: 4K0-201-991-BC (Alternates: 4K0201991BC, 4K0 201 991 BC)
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Part Type: Fuel System Breather Line / Ventilation Tube
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Condition: Brand New
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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:
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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!