Volvo VN/VNL/VNM Coolant Reservoir / Expansion Tank (2004–2007) – Replaces 603-5504
Warranty Information
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.
Shipping & Returns
Most ROADWEST orders ship from our U.S. warehouses within 1–2 business days. Standard ground delivery in the contiguous United States is typically 1–3 business days, with freight service used for oversized or extra-heavy parts.
- Shipping area: United States only (no PO Boxes or international addresses).
- Processing time: In-stock items usually ship within 1–2 business days, Mon–Fri.
- Delivery: Standard ground or LTL freight depending on size and weight.
- Returns: Most unused items may be returned within 30 days of delivery, subject to inspection and our return guidelines.
- Costs: Original and return shipping are generally the customer’s responsibility, unless the issue is caused by ROADWEST (wrong item, damaged on arrival, etc.).
For full details, please review our Shipping Policy and Easy Return & Refund Policy before placing your order.
Keep your Volvo on the road with the High Soar Engine Coolant Reservoir Tank, designed specifically for Volvo VN, VNL and VNM trucks (2004–2007). This radiator coolant overflow / expansion tank is built as a direct aftermarket replacement for multiple OE part numbers, giving you OE-style fit and dependable performance.
The tank helps maintain the correct coolant level in the system, reduces continuous air ingress and supports stable engine operating temperature. Manufactured from durable plastic with an ABS exterior finish, it is designed to withstand underhood heat and vibration in heavy duty applications.
Whether you are replacing a cracked, leaking or discolored factory reservoir, this High Soar coolant tank offers a reliable solution that supports efficient engine cooling and long-term durability.
- Vehicle-specific fitment – Compatible with Volvo VN, VNL and VNM trucks model years 2004–2007, for easy identification and installation in common Volvo platforms.
- Direct aftermarket replacement – Cross-references OE 20519037, 20519039, 8140024, 1674922, 20461002, 20505819 as a replacement for part number 603-5504.
- Ideal cooling system solution – Engineered for a seamless installation that helps avoid continuous air ingress and reduces oxidative corrosion inside the cooling system.
- Stable coolant management – Works with the radiator to regulate coolant volume and flow so the engine can reach and maintain correct working temperature more quickly.
- Durable construction – Made from quality, coolant-resistant plastic with an ABS exterior finish to handle underhood heat, vibration and daily truck use.
- Heavy duty application – Suitable for vocational, regional haul and long-distance operations where reliable cooling performance is critical.
- Fitment reminder – Always double-check your truck’s year, model and OE part number to ensure this premium radiator coolant overflow tank is the correct application.
Package Includes:
- 1 × Engine Coolant Reservoir / Radiator Overflow Expansion Tank (Volvo VN/VNL/VNM 2004–2007 style)
| Brand | High Soar |
|---|---|
| Product Type | Engine Coolant Reservoir Tank / Radiator Coolant Overflow Expansion Tank |
| Compatible Vehicles |
Volvo VN (2004–2007) Volvo VNL (2004–2007) Volvo VNM (2004–2007) |
| OE Cross Reference | 603-5504, 20519037, 20519039, 8140024, 1674922, 20461002, 20505819 |
| Vehicle Service Type | Heavy Duty Truck – Volvo VN, VNL, VNM (2004–2007) |
| Material | Plastic with ABS exterior finish |
| Item Dimensions (L × W × H) | 11 × 10 × 22 inches |
| Function | Stores and manages coolant overflow, helps prevent air ingress and supports quick warm-up and stable engine operating temperature |
| Fit Type | Vehicle Specific – Volvo VN / VNL / VNM 2004–2007 |
| Installation | Direct bolt-on replacement using OE-style mounting points and hose connections |
| Usage Scenarios | Fleet maintenance, repair of cracked/leaking reservoir, preventive cooling system service on Volvo heavy duty trucks |
| Notes | Verify truck model, year and OE number before ordering to ensure proper fitment |