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Engine Coolant Reservoir Radiator Tank Bottle with Cap Sensor Fit For Kenworth T600 T660 T800 T880 W900 Peterbilt 320 335 337 365 382 384 385 386 387 388 389 Replace OE 603-5403 N5346001

Free shipping on orders over $29.99

$91.99

$ 36 .99 $36.99

In Stock
  • Compatibility : The Coolant Reservoir Tank Compatible With Kenworth T600,T660, T800,T880,W990, Peterbilt 325, 330, 335, 337, 340, 348, 357, 365, 367, 379, 382, 384, 385, 386, 387, 388, 389. Comes with a cap and sensor.
  • Replacement Part Number : N5346001,603-5403. Before ordering please confirm whether the engine coolant reservoir is suitable for your truck.
  • Premium Quality : The coolant reservoir tank has been thoroughly tested to better withstand the heat and engine vibration under pressure. It's to ensure performance and lasting quality over time.
  • How a Coolant Reservoir Works : The coolant reservoir is a vital component of the cooling system. Its function is to store excess coolant fluid until required. Heat and engine vibration can damage plastic over time causing cracks and leaks. This coolant expansion tank gives additional coolant a place to go after expansion and contraction due to temperature change.
  • After-sales : If you have any problem when you are using the item, please contact us. We will handle it as soon as possible.


Replacement Coolant Overflow Reservoir Tank
The coolant reservoir tank contains coolant fluid that is discharged from the cooling system attached to the engine. Pressure builds up and released when the coolant is hot and expanding through the radiator and when the engine cools down, the excess fluid flows back into the radiator from the coolant tank of your vehicle.

OEM Fit, Quality, Finish
While this is not a genuine OEM part, it is a direct replacement and will look, fit and work exactly like the factory part. Coolant reservoir tank's common issue is leakage that can cause overheated engine. Safely turn off the engine and let the temperature drop before opening the radiator's cap or the coolant tank to reduce and release the pressure out safe.

Lifetime Warranty
This coolant reservoir tank comes complete with a lifetime warranty. If the part ever fails on your vehicle, simply contact us for a replacement. Save time and money off of dealer prices by purchasing this part and taking advantage of our warranty.


Cynthia Alvarez
Reviewed in the United States on December 2, 2024
The Level Sensor is malfunctioning, is saying tank low when is full, this issue didn’t happen with old tank, connector pins are good, Please send me another level sensor for this tank so I don’t have to return it, once I get it Ill change review
Patrick Dewayne Martin
Reviewed in the United States on March 26, 2023
After only two months this part failed it has a pin hole leak. All of the coolant leaked out while I was being unloaded luckily I didn’t throw away my old one.
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