Description
Product Overview
The Jaronx aluminum water hose fitting is engineered to replace the weak OEM plastic component in BMW cooling systems. Constructed from billet 6061 aluminum, the fitting provides superior durability, wear resistance, and a larger internal diameter that enhances coolant flow and overall engine cooling efficiency. Weighing just 2.89 ounces and measuring 2.83 x 2.24 x 2.05 inches, it offers a lightweight yet robust solution. The design eliminates sharp corners, ensuring smooth coolant passage and reducing turbulence.
Usage
Designed for BMW 1, 3, 5, 6, 7, and Z4 series equipped with N52, N53, N54, and N51 3.0‑litre engines, this fitting is ideal for both street and performance applications. Install it directly by removing the hose end from the original plastic fitting; no need to detach the hose from the thermostat housing. Perfect for DIY enthusiasts, professional mechanics, and anyone seeking a reliable upgrade to prevent leaks and overheating.

Why Choose Us
Jaronx combines precision engineering with high‑grade materials to deliver a product that outlasts standard OEM parts. Our aluminum fitting is tested for thermal stability and corrosion resistance, guaranteeing long‑term performance under demanding conditions. Backed by a solid customer rating of 4.2 stars from over 600 reviews, you can trust the quality and fitment accuracy of each unit.
Key Features
- Billet 6061 aluminum construction for unmatched durability
- Larger diameter improves coolant flow and cooling efficiency
- Direct fit design requires no hose removal from thermostat housing
- Compatible with a wide range of BMW models and engine codes
- Lightweight (2.89 oz) yet robust, resisting cracks and wear
FAQ
Is this fitting compatible with all BMW models?
The fitting is specifically designed for BMW 1, 3, 5, 6, 7, and Z4 series with N52, N53, N54, and N51 3.0‑litre engines. Verify your engine code before purchase.
Do I need special tools to install the fitting?
No special tools are required. Simply remove the hose end from the original plastic fitting and snap the aluminum fitting into place. The process is tool‑free and quick.
Will the larger diameter affect my coolant system pressure?
The increased diameter is engineered to maintain optimal system pressure while enhancing flow. It does not cause over‑pressurization and actually helps reduce hotspots.
Can I use this fitting with aftermarket hoses?
Yes, the fitting works with both OEM and high‑quality aftermarket hoses, provided the hose size matches the fitting’s specifications.
What warranty does Jaronx offer?
Jaronx provides a one‑year limited warranty covering manufacturing defects, ensuring peace of mind for your upgrade.







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