Uselection Coolant Reservoir Overflow Hose Set for Audi A4/A5 2016–2025 — 4-piece direct-fit, heat-resistant OE replacement

These four replacement coolant reservoir overflow hoses by Uselection restore proper coolant circulation and overflow control for compatible Audi A4/A5/S4/S5 models from 2016–2025.

Designed as direct-fit replacements for OE numbers 8W0121081BL, 8W0121081BK, 8W0121081AN and 06L121081K, this four-piece set replaces worn, cracked, or leaking reservoir hoses to help maintain the cooling system’s integrity. Each hose is molded to match factory routing and connection points for a straightforward installation. The set covers a range of Audi 1.4L and 2.0L engines across A4, A5 and their S/Avant/Sportback/Cabriolet variants where listed. A one-year unlimited-mileage guarantee backs the set, and customers are asked to confirm vehicle fitment using the model selector and Special Notes before ordering.

How do these hoses fit my Audi model and engine?

These hoses are manufactured to match the original equipment specifications and are labeled with the OE reference numbers that correspond to specific Audi fitments. They are intended for A4 and A5 series vehicles with the listed 1.4L and 2.0L engine options from model years 2016 through 2025.

• Replaces OE: 8W0121081BL, 8W0121081BK, 8W0121081AN, 06L121081K
• Compatible with Audi A4/Avant 1.4L & 2.0L (2016–2025)
• Compatible with Audi A4/S4 Avant/Quattro 1.4L & 2.0L (2016–2025)
• Compatible with Audi A5/S5 Cabriolet 2.0L and Coupe/Sportback 1.4L & 2.0L (2017–2025)

What materials and construction ensure durability?

Each hose is molded from automotive-grade elastomer designed to resist heat, oil and coolant exposure typical of engine compartments. Precision molding and reinforced connection ends help maintain a leak-free seal at factory-style hose fittings.

• Heat-resistant elastomer body for engine bay conditions
• Factory-style molded ends for secure connections
• Reinforced sections where bends and clamps apply stress
• Quality checks to conform with OE fit and function

How difficult is installation and what should I prepare?

Installation is straightforward for anyone comfortable with basic vehicle maintenance: drain a small amount of coolant if necessary, detach the old hoses, and route the new parts into place. Use correct clamps and torque, and top off coolant to manufacturer specifications after installation; no special tools are typically required beyond common hand tools and pliers.

• Simple hand tools and pliers usually sufficient
• Minimal coolant handling—follow safety guidelines
• Confirm hose routing matches factory layout before tightening
• Refill and bleed cooling system per Audi procedures

What warranty and purchasing tips should I know?

Uselection offers a one-year unlimited-mileage guarantee on these hoses, giving coverage against defects in materials and workmanship. Before buying, enter your vehicle details into the listing and review the Special Notes to ensure correct fitment and avoid returns.

• One-year unlimited-mileage guarantee included
• Verify vehicle fitment via the listing selector
• Check part numbers and Special Notes before ordering
• Contact seller for fitment questions or additional support

Who is this for: This four-piece Uselection hose kit is aimed at Audi owners and independent mechanics who need direct-fit replacements for coolant reservoir overflow lines on A4 and A5 family vehicles with 1.4L or 2.0L engines from 2016–2025. It’s suitable for DIY maintenance, routine cooling-system repairs, and shops seeking OE-equivalent parts with a backed warranty. Confirm your exact model and engine code before purchasing to ensure compatibility.