Freightliner M2 Coolant Reservoir / Overflow Tank (2005–2010)

Vehicle Fitment
Freightliner M2 (2005–2010) Freightliner M2 106 (2005–2010) Freightliner M2 112 (2009–2010)
$94.99 USD
$94.99 USD $99.99 USD
QC VERIFIED Built for Truckers. We stock it, inspect it, and verify fitment - so you get the right part first time, for less.
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DESCRIPTION

Up to 5% off

Keep your Freightliner M2 cooling system working reliably with the ROADWEST Engine Coolant Reservoir Tank. This heavy duty coolant overflow / expansion tank is engineered as a direct replacement for multiple Freightliner M2, M2 106 and M2 112 applications and cross-references several OE numbers to make part selection easier.

Designed to meet OE-style fit, form and function, this reservoir helps maintain the correct coolant volume, avoids continuous air ingress and supports stable engine temperature under daily vocational or regional haul workloads. It is ideal for replacing cracked, leaking or discolored original tanks on aging fleets.

Manufactured from quality, heat- and vibration-resistant materials, the ROADWEST tank is built to handle demanding underhood conditions on medium and heavy duty trucks.

  • Direct aftermarket replacement – Compatible with Freightliner M2 2005–2010, M2 106 2005–2010 and M2 112 2009–2010 for hassle-free replacement of the factory tank.
  • OE cross-reference – Replaces 0521178000, 0523195000, 0523195001, Z0530740000, Z0530740001, simplifying ordering and ensuring correct application.
  • Ideal cooling system solution – Engineered for a seamless installation that helps avoid continuous air ingress and reduce oxidative corrosion of internal components.
  • Stable engine temperature control – Works with the radiator and cooling circuit to regulate coolant volume and flow so the engine reaches and maintains working temperature quickly.
  • Durable construction – Built from high-quality coolant-resistant material designed to withstand underhood heat and vibration in commercial-duty environments.
  • Fleet-friendly replacement – OE-style mounting points and connections support clean installation for shop technicians and owner-operators.
  • Fitment note – Always verify your truck’s year, model and OE number before purchase to ensure this premium radiator coolant overflow tank matches your application.

Package Includes:

  • 1 × Engine Coolant Reservoir / Radiator Overflow Expansion Tank (Freightliner M2 style)
Brand ROADWEST
Product Type Engine Coolant Reservoir Tank / Radiator Coolant Overflow Tank
Compatible Vehicles Freightliner M2 2005–2010
Freightliner M2 106 2005–2010
Freightliner M2 112 2009–2010
OE Cross Reference 0521178000, 0523195000, 0523195001, Z0530740000, Z0530740001
Vehicle Service Type Medium / Heavy Duty Truck – Freightliner M2, M2 106, M2 112
Material Premium coolant-resistant plastic designed for heat and vibration
Fit Type Vehicle Specific – Freightliner M2 platforms (years listed)
Function Stores and manages coolant overflow, helps avoid air ingress and supports quick warm-up and stable engine operating temperature
Installation Direct bolt-on replacement with OE-style mounting points and hose connections
Usage Scenarios Fleet maintenance, replacement of cracked/leaking factory reservoir, preventive cooling system service
Notes Verify truck year, model and OE number before ordering to ensure proper fit

Shipping Policy

Most ROADWEST orders are processed from our U.S. warehouses within 1–2 business days (Monday–Friday, excluding major U.S. holidays).

We currently ship within the United States only and do not deliver to P.O. Boxes, APO/FPO/DPO addresses, or international addresses.

  • Shipping Area: United States only
  • Process Time: In-stock items are usually processed within 1–2 business days (Mon–Fri, excluding major U.S. holidays)
  • Delivery Method: Standard ground for most items; LTL freight for oversized or extra-heavy parts
  • Delivery Time: After shipment, delivery typically takes 3–7 business days, depending on item size, destination, and carrier performance
  • Returns: Most unused items may be returned within 30 days of delivery, subject to inspection and our return guidelines

For full details, please review our Shipping Policy and Easy Return & Refund Policy before placing your order.

Warranty

ROADWEST stands behind the parts we sell. Unless otherwise stated on the product page, your purchase is covered by a 1-Year Limited Warranty against manufacturing defects under normal use.

What’s covered

  • Defects in materials or workmanship
  • Premature failure caused by factory-related issues

What’s not covered

  • Normal wear and tear, cosmetic aging, corrosion from environment/road salt
  • Damage from improper installation, incorrect wiring, modifications, misuse, or accidents
  • Labor costs (installation/removal), downtime, towing, or other indirect costs

How to file a claim

Contact us with:

  • Order number
  • Product name / SKU
  • Clear photos or a short video showing the issue

If approved, ROADWEST will provide an appropriate resolution (replacement parts, replacement unit, or refund/credit).

Please do not send items back without return authorization.

For more details, see our Shipping Policy, Easy Return & Refund Policy, and Warranty pages.
Freightliner M2 Coolant Reservoir / Overflow Tank (2005–2010)

$94.99 USD