LOSTAR Coolant Reservoir with Cap & Sensor for 2008–2017 Volvo VNL/VHD and Mack CHU/CXU — Direct-Fit, OE Match

LOSTAR replacement coolant reservoir with cap and sensor restores proper coolant level monitoring and overflow control for select Volvo and Mack heavy trucks.

Designed as a direct-fit replacement for worn or damaged expansion tanks, this LOSTAR coolant reservoir assembly includes the pressure cap and sensor port to get your truck back on the road quickly. It matches factory fitment for many 2008–2017 Volvo VNL, VNM and VHD models and Mack CHU, CXU, and Pinnacle chassis using the referenced OE numbers. Built to meet the vehicle’s original dimensions and mounting points, the unit simplifies swaps with no drilling or cutting required and comes with a 1-year limited warranty.

Will this overflow tank fit my 2008–2017 Volvo or Mack truck?

Yes — this reservoir was manufactured to match the fitment specifications for a range of Volvo and Mack heavy-duty trucks from model years 2008 through 2017. Compatibility aligns to original equipment part numbers and common chassis applications, helping ensure the tank mounts and connections line up without modification.

• Compatible models: Volvo VNL, VNM, VHD and Mack CXU, CHU, Pinnacle variants
• Referenced OE numbers: 21513979, 21846995, 21846997, 22061288
• Alternate part numbers included: 603-5505, 6035505
• Plug-and-play installation: no cutting or drilling required

How easy is it to install this coolant reservoir?

Installation is straightforward for a mechanically minded technician because the tank matches factory mounting points and hose connections. The assembly is supplied brand-new and ready to swap into the vehicle, reducing labor time compared with custom or universal tanks.

• Pre-molded mounting bosses align with factory brackets
• Standard inlet/outlet positions for original hoses and clamps
• Includes cap and sensor port to reuse OEM sensor or replacement
• No drilling, cutting, or fabrication necessary

What materials and performance can I expect from this replacement part?

The reservoir is manufactured from durable automotive-grade plastic designed to resist coolant chemicals, heat cycles, and vibration typical of heavy-truck service. It arrives new to avoid the brittleness, cracks, or leaks that can develop in old tanks, and the cap seals to maintain system pressure and proper overflow control.

• Durable thermoplastic body resists coolant exposure and impacts
• Factory-matching dimensions to preserve coolant capacity and flow
• Included cap maintains correct pressure and vapor control
• 1-year limited warranty for added confidence

Which part numbers and sensors are covered by this assembly?

This LOSTAR reservoir cross-references several original equipment numbers, making it easier to verify compatibility with your truck’s parts list. It accepts the standard coolant level sensor used on the matched Volvo and Mack applications, allowing reuse of the vehicle’s sensor or replacement when necessary.

• OE references: 21513979, 21846995, 21846997, 22061288
• Other catalog numbers: 603-5505, 6035505
• Sensor-ready design: retains OEM sensor location and connector
• Cap included to match system pressure requirements

Who is this for: Fleet maintenance managers, independent diesel mechanics, and owner-operators who need a reliable, direct-fit coolant reservoir replacement for Volvo VNL/VNM/VHD or Mack CXU/CHU/Pinnacle trucks. Choose this LOSTAR assembly when you want a factory-matching tank that installs quickly, preserves coolant system function, and comes with a limited warranty for peace of mind.