ECS Tuning Exact-Fit Coolant Vent Line / Water Pipe Connecting Hose for BMW E46 M3 (S54 3.2) - Pre-Formed Silicone, Billet Aluminium Fitting - OEM-Style Direct Replacement
ECS Tuning Exact-Fit Coolant Vent Line / Water Pipe Connecting Hose for BMW E46 M3 (S54 3.2) - Pre-Formed Silicone, Billet Aluminium Fitting - OEM-Style Direct Replacement
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ECS Tuning Exact-Fit Coolant Vent Line / Water Pipe Connecting Hose for BMW E46 M3 (S54 3.2) - Pre-Formed Silicone, Billet Aluminium Fitting - OEM-Style Direct Replacement

£140.43
£140.43
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ECS Tuning Exact-Fit Water Pipe Connecting Line for BMW E46 M3 S54

Stop common E46 M3 coolant leaks before they start. The factory S54 coolant vent line can become brittle with age and engine bay heat, leading to cracks, coolant loss and potential overheating. The ECS Tuning Exact-Fit Water Pipe Connecting Line replaces that weak plastic assembly with a durable, pre-formed silicone hose and a robust billet aluminium fitting for a long-term, OEM-style solution.

This is a direct-fit, preventative maintenance upgrade for any BMW E46 M3 S54 3.2. It keeps the stock look and routing while dramatically improving reliability. Install it once, then enjoy peace of mind on the road, on track and in daily use.

Why choose this ECS Tuning coolant vent line upgrade

  • Exact fit for BMW E46 M3 S54 3.2 coolant vent line replacement
  • Pre-formed silicone hose for OEM routing and a factory appearance
  • Reinforced fluorosilicone liner that is coolant safe and heat resistant
  • Billet 6061-T6 aluminium fitting, MIL-A-8625F Type II Class 2 black anodised for strength and corrosion resistance
  • Single-piece fitting design reduces potential leak points
  • Pressure tested to 2x operating pressure for reliability
  • Retains stock retaining clips for tidy installation
    Note. Due to slight variations in silicone, the retainer on the expansion tank may not fit
  • No need to drain the cooling system, quick and simple install

What you get

  • Black reinforced fluorosilicone lined, coolant safe, pre-formed silicone hose
  • Black anodised billet aluminium fitting, OEM-style connection to the upper coolant hose

Fitment

BMW E46 M3, S54 3.2 petrol inline-six.

Installation and support

Designed for a straightforward DIY, even for entry-level mechanics. For professional fitting, book with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.

Trusted quality

We have fitted this ECS Tuning coolant line on E46 M3s and customers appreciate the exact fit, OEM look and long-term reliability. It is a smart upgrade that eliminates a known weak point in the E46 M3 cooling system.

Common search terms

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