One-stop purchase water supply pipe 4H0 122 101 C for A8/S8

High-failure cooling rubber pipe for integrated one-stop procurement
Radiator upper hoses are standard aging vulnerable parts for A8 D4 S8. Original hoses suffer rubber hardening, surface cracking, quick connector aging leakage and pipe bulging deformation after long-term 130℃ engine bay high temperature, coolant corrosion and vibration. Damaged pipes cause coolant seepage, unstable engine temperature, overheating under climbing/heavy load, dashboard low coolant warning and hidden risk of cylinder head high-temperature damage. Professional Audi repair stores and export distributors usually match this hose with full cooling overhaul kits for one-stop purchasing to cut procurement and logistics costs, featuring stable turnover and reliable profit space for dealers.
100% OE precise molded fit, direct plug-in installation without modification
Manufactured strictly following VAG original injection molding standards: integral bending radian, two-end quick-release connector size, pipe wall thickness, steel hoop positioning and overall length fully match genuine OEM 4H0122101C. Cross interchangeable equivalent code: 4H0122101D (diesel version). Built-in integrated EPDM sealing rings at both ends as standard; no cutting, trimming or adapter conversion required during replacement, perfectly connect radiator upper port and engine hard water pipe, drastically shorten front cooling module disassembly labor hours.
Compatible Vehicle Range
Core matching models: Audi A8 D4, S8 Quattro (2011–2017) 3.0T EA837 supercharged petrol engine
Interchangeable VAG platform vehicles: Audi A6 C7, A7 C7, RS7 with identical radiator upper hose installation structure
Reinforced high-temperature coolant-resistant multi-layer rubber structure
Three-layer composite EPDM rubber pipe body, inner oil-resistant lining, middle fiber reinforcement layer, outer anti-aging protective layer, anti-expansion and anti-cracking under long-term high temperature
Original-style quick-release plastic connectors with built-in lock buckles, tight clamping without loosening during driving vibration
Stainless steel fixing hoops at both ends, uniform compression to avoid local coolant leakage
Custom bending contour consistent with original vehicle layout, no friction abrasion with surrounding wiring harness and water pipes
Resistant to ethanol mixed antifreeze, not easy to swell or block internal flow channel
Stable large-flow coolant circulation to protect large-displacement supercharged engine
Transmit high-temperature coolant between radiator and engine to realize continuous heat dissipation balance. Stabilize engine operating temperature during high-speed, climbing and full-load driving, eliminate sudden temperature surge and overheating alarm, reduce turbocharger and cylinder head ablation risk, and extend service life of the whole cooling system assembly.
Fully resolve typical water pipe failure faults
Perfectly fixes common EA837 cooling system malfunctions:
Coolant seepage and liquid stains at hose connector positions
Engine temperature fluctuates sharply, overheating warning light activates under heavy load
Original rubber pipe hardening, cracking, bulging and bursting
Loose quick connector leading to sudden coolant loss
Slow warm-up and insufficient hot air output in cold winter
Abnormal coolant peculiar smell diffuses inside engine compartment
Rigorous multi-stage factory testing & sufficient mixed inventory
Every coolant hose undergoes high-low temperature cycle aging test, coolant immersion corrosion test, hydraulic pressure burst leakage test and bending fatigue test before delivery, compliant with IATF 16949 international automotive quality standards. Mass ready stock supports mixed one-stop bulk procurement with radiators, expansion tanks, auxiliary water pumps, cooling fan assemblies and complete A8 D4 cooling overhaul kits. Custom neutral packaging and private label OEM services are available for domestic wholesale and cross-border export buyers.