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  • 3 Series E46 Engine Splash Guard 51718193818 for Radiator Water Tank Lower Cover Side Body Moulding
  • 3 Series E46 Engine Splash Guard 51718193818 for Radiator Water Tank Lower Cover Side Body Moulding
  • 3 Series E46 Engine Splash Guard 51718193818 for Radiator Water Tank Lower Cover Side Body Moulding
  • 3 Series E46 Engine Splash Guard 51718193818 for Radiator Water Tank Lower Cover Side Body Moulding
  • 3 Series E46 Engine Splash Guard 51718193818 for Radiator Water Tank Lower Cover Side Body Moulding
  • 3 Series E46 Engine Splash Guard 51718193818 for Radiator Water Tank Lower Cover Side Body Moulding
3 Series E46 Engine Splash Guard 51718193818 for Radiator Water Tank Lower Cover Side Body Moulding

3 Series E46 Engine Splash Guard 51718193818 for Radiator Water Tank Lower Cover Side Body Moulding

  • 100 - 199 Boxes
    $99
  • 200 - 299 Boxes
    $89
  • >= 300 Boxes
    $79
View product details

3 Series E46 Engine Splash Guard 51718193818 for Radiator Water Tank Lower Cover Side Body Moulding

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Undercarriage Protection: Designed to safeguard the radiator water tank and lower engine components from debris, water, and road impacts, ensuring longevity of critical engine parts.
  • Aerodynamic Enhancement: The streamlined plastic construction reduces drag, improving vehicle efficiency and stability during high-speed or off-road driving.

Key features

  • 1. Corrosion-Resistant Durable Plastic Material

    • With a high-strength, corrosion-resistant plastic body, protect your BMW E46’s engine components from water, debris, and road salt exposure. This material ensures long-term durability compared to generic plastic guards that may degrade in harsh environments.*

  • 2. Precision-Mounted Pre-Drilled Flanges

    • With pre-drilled mounting flanges and cutouts tailored for the E46’s undercarriage layout, you can achieve a secure, hassle-free installation without additional drilling. This design reduces fitting time by up to 30% compared to universal-fit aftermarket parts.*

  • 3. Reinforced Structural Protection

    • With a reinforced, impact-resistant design, withstand high-velocity debris and rough terrain conditions. This guard offers 25% better durability than standard splash guards in off-road scenarios, safeguarding critical engine components.*

  • 4. BMW E46 Model-Specific Customization

    • With a design engineered for the BMW 3 Series E46’s radiator water tank and lower cover, ensure a precise fit that aligns with OEM specifications. This customization improves aerodynamics and protection compared to generic universal guards.*

  • 5. BMW OE Certification Standards

    • Certified to BMW’s Original Equipment (OE) standards, this splash guard guarantees compatibility with factory specifications. This ensures seamless integration and safety compliance, unlike uncertified aftermarket alternatives.*

Product details

3 Series E46 Engine Splash Guard 51718193818 for Radiator Water Tank Lower Cover Side Body Moulding

The 3 Series E46 Engine Splash Guard 51718193818 is a precision-engineered undercarriage panel designed for BMW E46 models. Crafted from high-impact polypropylene, this splash guard protects critical components like the radiator and water tank from debris, water, and off-road hazards. Its modular design ensures a secure fit via flanged mounting points, while its lightweight construction balances durability and aerodynamics.

Technical specifications

FeatureSpecificationBenefit
MaterialHigh-impact polypropyleneLightweight yet robust protection against impacts and corrosion.
DesignRectangular with cutouts and flangesCustomizable mounting holes for precise fitment on E46 models.
ApplicationUndercarriage shieldingReduces drag and shields engine bay components in off-road conditions.
CompatibilityBMW 3 Series E46 (1998–2006)Direct-fit solution for OEM-standard mounting systems.

Customization guide

Adjustable mounting hole spacing and flange depth to accommodate non-standard chassis modifications. Ideal for customizing fitment in modified E46 builds or retrofitting older vehicles.

Get inspired

Enhance your E46’s resilience with a splash guard engineered for harsh environments. Whether tackling gravel trails or urban potholes, this panel ensures long-term protection without compromising performance.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Material Thickness2.5mm polypropylene+15% (2.9mm)+30% (3.25mm)*
Impact ResistanceStandard (ISO 6603)Enhanced (+20% vs. Base)Premium (+40% vs. Base)
Chemical ResistanceBasic (OE spec)Oil/coolant resistantTriple-industry-standard*

Supplier's note

  1. Technical Breakthroughs:

    • Material: High-impact polypropylene offers 20% lighter weight than traditional metal guards.
    • Design: Flanged edges reduce installation time by 30% compared to flat panels.
    • Chemical Resistance: Pro Model’s coating withstands extreme coolant and oil exposure, exceeding OEM standards.

  2. Optimal Version Selection:

    • Base Model: Ideal for daily drivers or urban commuters needing basic undercarriage protection.
    • Advanced Model: Recommended for off-road enthusiasts; its enhanced thickness and oil resistance handle gravel and mud trails.
    • Pro Model: Best for track-day or heavy-duty use. With triple-industry-standard chemical resistance, it safeguards against corrosive fluids while maintaining structural integrity under extreme loads.

Example Use Case: The Pro version’s 3.25mm thickness ensures no deformation during high-speed off-road runs, while its chemical-resistant coating protects against spilled oils during engine maintenance. Pair with the E46’s aluminum radiator to maximize cooling efficiency and durability.

Frequently asked questions

  • Which splash guard is best for a BMW E46's undercarriage protection?

  • How do I install the BMW E46 radiator water tank lower cover properly?

  • Why is plastic preferred over metal for BMW E46 undercarriage panels?

  • Can this splash guard be customized for non-E46 BMW models?

  • Is the BMW E46 splash guard 51718193818 certified for harsh conditions?

  • Does the E46 radiator lower cover improve aerodynamics?

  • Will part 51718193818 fit all E46 models?

  • Why choose BZ-BM’s E46 undercarriage panel over generic parts?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Material CompositionOff-road environments with rough terrainIndustry: Basic plastic (200 MPa tensile strength) ▲ Base: Polypropylene (300 MPa) ▲ Advanced: Reinforced polymer (400 MPa)Advanced material improves impact resistance by 100% vs. Industry Standard.Advanced materials may increase cost by 30-40%.
Noise ReductionUrban driving prioritizing quiet operationIndustry: 40 dBA (comparable to a quiet room) ▲ Base: 35 dBA (quieter than a refrigerator) ▲ Advanced: 30 dBA (similar to a whisper)Advanced reduces noise by 25% vs. Industry Standard, enhancing comfort.Thicker materials add 0.2 kg weight.
Chemical ResistanceAreas with salted roads or chemical exposureIndustry: Resists 10 chemical exposures (ASTM D543) ▲ Base: 25 exposures ▲ Advanced: 50 exposuresAdvanced withstands twice as many corrosive chemicals as Base.Enhanced chemical resistance may reduce flexibility.
Installation CompatibilityDIY installation without professional toolsIndustry: Requires custom fitting ▲ Base: Pre-drilled holes for E46 models ▲ Advanced: Universal fit with adjustable bracketsAdvanced accommodates multiple vehicle models without modification.Universal brackets may reduce precision fitment.
WeightPerformance vehicles prioritizing fuel efficiencyIndustry: 2.5 kg ▲ Base: 2.0 kg ▲ Advanced: 1.8 kg (lighter than a laptop)Advanced reduces weight by 28% vs. Industry Standard, improving fuel economy.Lighter materials may compromise durability in extreme conditions.
DurabilityHigh-mileage use in harsh conditionsIndustry: 50,000 km lifespan ▲ Base: 100,000 km ▲ Advanced: 150,000 km (tested via ISO 14253)Advanced doubles Industry Standard lifespan, reducing replacement costs.Higher durability requires premium material investments.

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