Peterbilt Washer Fluid Reservoir w/ Cap (2006–2015) – Replaces N5355001 / P6615001

Keep your visibility clear in all weather with the ROADWEST Washer Fluid Reservoir Tank with Cap, engineered as a direct replacement for select Peterbilt trucks. This tank is designed to match the fit, function and performance of the original washer fluid reservoir on multiple Peterbilt models.

Manufactured from high-quality plastic and thoroughly tested for heat aging and burst resistance, this washer reservoir withstands the demanding underhood environment of heavy-duty trucks. Each unit is carefully scanned to match OEM dimensions, ensuring a clean, hassle-free installation.

This configuration is specifically tailored for Peterbilt applications using a Cummins engine with a BEHR cooling module. It restores proper windshield washer function so drivers can maintain a clear view in rain, snow and road grime conditions.

• Direct OE-style replacement – Replaces OEM part numbers N5355001 and P6615001 for selected Peterbilt trucks.
• Peterbilt compatibility – Designed for Peterbilt 320, 330, 335, 357, 365, 378, 384, 388 model years 2006–2015 (using a Cummins engine with BEHR cooling module).
• Durable construction – Injection-molded plastic resists heat, vibration and cracking, delivering long service life in heavy-duty use.
• Thoroughly tested – Design has undergone heat age testing and burst testing to help ensure reliability in harsh working conditions.
• Exact-fit design – Each reservoir is scanned and shaped to precisely match the OEM tank for a clean, factory-style installation.
• Ready to install – Comes with reservoir and cap; reuse existing hardware where applicable for quick replacement.
• Application note – Always verify year, model and OE number before ordering to ensure proper fit for your Peterbilt.

Package Includes:

• 1 × Washer Fluid Reservoir Tank
• 1 × Reservoir Cap