2008-New Kenworth T660/T700/T2000/T800 | Peterbilt 388/389/589 Coolant Reservoir Tank | OEM# N5346001 | 603-5403 - With Cap & Sensor

OEM Part Number:

• N5346001
  
• 603-5403

✅ Product Overview:

This high-quality coolant reservoir tank is a direct-fit replacement for Kenworth T660/T700/T2000/T800 and Peterbilt 388/389/589 models from 2008 to current. Designed for durability and precision, it includes a coolant cap and sensor—everything needed for a simple, ready-to-install solution.

Built with heavy-duty leak-resistant plastic, and backed by rigorous testing, this tank meets the demands of commercial truck applications. All units are tested at 20 PSI for leaks, meet IATF 16949 quality standards, and are validated through our Thousand Truck Fitting Test (TTFT) for real-world reliability.

🚚 Vehicle Compatibility:

• Kenworth T660 – 2008+

•  

  Kenworth T700 – 2008+

   

• Kenworth T800 – 2008+

• Kenworth T2000 – 2008+

• Peterbilt 388 – 2008+

• Peterbilt 389 – 2008+

• Peterbilt 589 – 2008+

🔍 Fitment based on OEM. Please confirm part number or contact us with your VIN to verify compatibility.

📦 What’s Included:

• ✅ Coolant Reservoir Tank

• ✅ Coolant Level Sensor

• ✅ Coolant Tank Cap

🛠 Key Features:

• ✅ Made from heavy-duty plastic to resist heat and prevent leaks

• ✅ Includes sensor and cap pre-installed

• ✅ Passes 20 PSI leak test on 100% of units

• ✅ Certified to IATF 16949 automotive quality standards

• ✅ Verified fit through Thousand Truck Fitting Test (TTFT)

⚠️ Important Fitment Warning:

This tank is engineered with one large pipe connection and one small pipe connection.
It is not compatible with cooling systems that use two small pipe connections.
Please confirm your hose port sizes before purchasing.

💬 Questions?

Need to confirm fitment? Message us with your OEM number or VIN — our team is happy to assist!