Genuine Renault Expansion Tank Cap 1.4 Bar - Super 5 GT Turbo / Clio 16S / Williams / R21 Turbo

Why neglecting your expansion tank cap could be a costly mistake

Overlooking the condition of the expansion tank cap on your Renault sport vehicle is a significant risk to your engine's longevity. Over time, the internal pressure relief valve can become clogged or seized. If the pressure is no longer regulated at 1.4 Bar, you expose your cooling system to hose bursts or, worse, a catastrophic head gasket failure. Don't let a low-cost part jeopardize the reliability of your Clio 16V or R21 Turbo.

Genuine OEM part for total peace of mind

Unlike aftermarket replicas, this 1.4 Bar pressure cap is a genuine Renault part. It meets the strict thermal tolerance standards set by engineers for turbocharged and multi-valve engines. At Optimiz Access, we understand that professional customization and maintenance of automotive icons require certified components that fit perfectly every time.

Vehicle Compatibility and Fitment

This model is strictly compatible with the following vehicles:

• Renault Super 5 GT Turbo (Phase 1 & Phase 2)
• Renault Clio 1 16S / 16V
• Renault Clio Williams (2.0L)
• Renault 21 2L Turbo

Optimiz Access Expertise: More than just an online store

Specializing in the maintenance and tuning of sports cars since 2010, Optimiz Access supports you in preserving your automotive heritage. Based in the Hauts-de-France region, near Lille and Valenciennes, our experts provide professional installation and cooling system diagnostics in our specialized workshop.

We ship this part with fast worldwide delivery, ensuring your passion stays on the road. Whether you are in Europe or across the globe, we bring premium parts to your doorstep.

Expert Technical Advice

A functioning 1.4 Bar cap is the guardian of your coolant. We recommend checking your expansion tank for micro-cracks while replacing the cap. You can find high-quality replacement tanks and complementary products at the bottom of this page.