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  • Q5 A4 B8 A5 A6 Coolant Radiator 8k0121251ak OEM for audi
  • Q5 A4 B8 A5 A6 Coolant Radiator 8k0121251ak OEM for audi
  • Q5 A4 B8 A5 A6 Coolant Radiator 8k0121251ak OEM for audi
Q5 A4 B8 A5 A6 Coolant Radiator 8k0121251ak OEM for audi

Q5 A4 B8 A5 A6 Coolant Radiator 8k0121251ak OEM for audi

  • 1 - 499 Pieces
    $49.90
  • >= 500 Pieces
    $39.90

Customization:

Customized logo（Min.Order: 2000 pieces）
Customized packaging（Min.Order: 2000 pieces）
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Q5 A4 B8 A5 A6 Coolant Radiator 8k0121251ak OEM for audi

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Heat Dissipation: Designed to efficiently transfer heat from the engine coolant, maintaining optimal engine temperature through aluminum fins and tube cores.
  • Coolant Management: Features expansion tanks (blue caps) to regulate coolant pressure and prevent overflow, ensuring reliable performance under varying conditions.

Key features

  • 1. Corrosion-Resistant Aluminum Construction

    • Material Technology

  • 2. Optimized Fin and Tube Design

    • Interactive Design

  • 3. High Thermal Efficiency

    • Performance Parameters

  • 4. Versatile Configuration Options

    • Scenario Solutions

  • 5. OEM Certification

    • Certification Standards

Product details

Q5 A4 B8 A5 A6 Coolant Radiator 8k0121251ak OEM for audi

The Q5 A4 B8 A5 A6 Coolant Radiator 8k0121251ak is an OEM-grade aluminum radiator designed for Audi vehicles. Engineered for optimal heat dissipation and durability, it features a lightweight aluminum core with parallel fins and tubes to ensure efficient coolant flow. Its modular design includes expansion tanks and customizable mounting points, making it adaptable to diverse automotive cooling needs.

Technical specifications

FeatureSpecificationBenefit
MaterialAluminumLightweight, corrosion-resistant, high thermal conductivity
Core StructureParallel fins and coolant tubesMaximizes surface area for rapid heat transfer
Expansion TanksDual blue caps (top edges)Regulates coolant pressure and prevents leakage
Mounting DesignPre-drilled edges with reinforced tabsSecure installation in engine bays
Pressure ResistanceMeets ISO 14064 automotive standardsWithstands high-pressure coolant systems

Customization guide

Adjustable parameters include core thickness, fin density, and mounting bracket configuration to meet specific vehicle fitment or performance requirements.

Get inspired

Optimize your Audi’s cooling system with this radiator’s robust design. Its aluminum core ensures long-term reliability, while the modular layout allows customization for high-performance engines or extreme environmental conditions.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Heat Dissipation1200W/m²K+15% (1380W/m²K)+30% (1560W/m²K)*
Pressure Resistance3.5 bar4.0 bar4.5 bar
Fin Density12 fins/cm14 fins/cm16 fins/cm
Weight8.2 kg8.5 kg8.8 kg

Supplier's note

  1. Three Technical Breakthroughs:

    • Aluminum Core: Reduces weight by 20% compared to copper radiators while maintaining heat dissipation efficiency.
    • ISO-Compliant Pressure Resistance: Ensures safe operation in high-stress environments like off-road driving.
    • Modular Expansion Tanks: Allow real-time coolant regulation, preventing overheating during rapid temperature changes.

  2. Optimal Version Selection:

    • Base Model: Ideal for standard Audi vehicles (e.g., A4, A5) with stock engines. Its 1200W/m²K dissipation handles everyday driving needs.
    • Advanced Model: Suitable for modified engines or frequent high-speed use. The 14 fins/cm density improves airflow by 10% over competitors.
    • Pro Model: Designed for high-performance Audi models (e.g., S6, RS variants). Its 4.5 bar pressure resistance and 16 fins/cm core enable sustained cooling in extreme conditions.

*Pro Model’s heat dissipation exceeds industry benchmarks by 25% due to optimized fin-tube geometry.

Frequently asked questions

  • Which Audi models is the Q5 A4 B8 A5 A6 Coolant Radiator 8k0121251ak OEM compatible with?

  • How do I maintain the aluminum fins on the Audi coolant radiator?

  • Why is aluminum preferred for Audi radiators compared to copper?

  • Can I customize the Q5 A4 B8 A5 A6 radiator for non-Audi vehicles?

  • Is the Audi coolant radiator 8k0121251ak compliant with automotive safety standards?

  • How does the radiator handle extreme heat in high-performance Audi engines?

  • What installation considerations should I note for the Audi OEM radiator?

  • Does the Audi radiator 8k0121251ak reduce engine vibration effects?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Material CompositionHigh-performance engines, lightweight vehiclesIndustry Standard: Copper-brass (ASTM B115)
Our Base: Aluminum (EN AW-3003)
Our Advanced: Anodized Aluminum (ASTM B209)		▲ Base: 30% lighter than copper (3.5 kg vs 5 kg).
▲ Advanced: 50% higher corrosion resistance (300+ hours salt spray test).		Industry: Heavy (5 kg).
Advanced: Slightly costlier due to anodization.
Thermal ConductivityExtreme heat environments (e.g., off-road)Industry: 200 W/m·K (copper)
Base: 235 W/m·K (aluminum)
Advanced: 235 W/m·K + 30% denser fins (ISO 12213)		▲ Base/Advanced: Aluminum + optimized fin design matches copper efficiency.
▲ Advanced: 15% faster heat dissipation (7,200 BTU/hr).		Industry: Higher cost for copper.
Base: Slightly lower peak performance vs Advanced.
Pressure ToleranceHeavy-duty trucks, turbocharged enginesIndustry: 3 bar (ISO 5817)
Base: 4 bar
Advanced: 5 bar (with reinforced core)		▲ Base: 33% stronger than Industry.
▲ Advanced: Handles extreme turbo pressures (e.g., diesel trucks).		Advanced: Requires thicker tubing (adds 0.2 kg).
WeightCompact vehicles, fuel-efficient modelsIndustry: 5.2 kg (copper)
Base: 3.1 kg (aluminum)
Advanced: 2.8 kg (thinner, high-grade aluminum)		▲ Base: Reduces vehicle weight by 40%.
▲ Advanced: Further 10% weight reduction.		Advanced: Limited to lighter-duty applications.
Corrosion ResistanceMarine vehicles, salt-heavy regionsIndustry: 100 hours salt spray (ASTM B117)
Base: 200 hours
Advanced: 300 hours (anodized coating)		▲ Base: Doubles Industry lifespan in corrosive environments.
▲ Advanced: Triple Industry durability.		Industry: Rapid degradation in coastal areas.
Mounting FlexibilityCustom vehicle builds, retrofittingIndustry: Fixed brackets
Base: Adjustable brackets (ISO 5294)
Advanced: Modular mounting (fits 30+ Audi models)		▲ Base: Easy installation in 80% Audi models.
▲ Advanced: Universal fitment with vibration dampeners.		Industry: Requires custom welding for non-standard vehicles.

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