Dorman 603-281 Engine Coolant Reservoir - Front

Overview of Dorman Engine Coolant Reservoir 603-281

The Dorman 603-281 engine coolant reservoir is designed for select BMW models, including the 320i, 323i, 325i, 328i, 528i, M3, and Z3. This pressurized coolant reservoir is constructed from durable plastic and features a black and yellow color scheme for easy identification.

• Material: High-quality plastic construction
• Color: Black/yellow for clear visibility
• Pressurized design to maintain optimal cooling system performance
• Includes mounting brackets for secure installation
• Single mounting hole for precise fitment
• Cap not included
• Package contains one coolant reservoir

Detailed Product Description

The Dorman 603-281 engine coolant reservoir is engineered to meet the cooling system requirements of various BMW vehicles such as the 320i, 323i, 323is, 325i, 325is, 328i, 328is, 528i, M3, and Z3. Made from durable plastic, this reservoir is designed to withstand the pressures of a pressurized cooling system, helping to maintain proper coolant levels and prevent overheating. The black and yellow color combination aids in quick visual checks during maintenance. Although the cap is not included, the reservoir comes with mounting brackets and a single mounting hole to ensure a secure and accurate fit within the engine bay.

Common Applications and Problem Resolution

• Replacement for cracked or leaking coolant reservoirs
• Solves coolant overflow and loss issues
• Prevents engine overheating caused by coolant system failure
• Restores proper coolant pressure in pressurized systems
• Addresses mounting instability with included brackets

Installation Notes and Tips

• Compatible with BMW 320i, 323i, 323is, 325i, 325is, 328i, 328is, 528i, M3, and Z3 models
• Mounting hardware is not included; use existing or purchase separately
• Ensure the mounting bracket aligns with the single mounting hole for secure fitment
• Verify coolant system pressure compatibility before installation
• Cap must be reused from the original reservoir or purchased separately

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 603-281 engine coolant reservoir undergoes rigorous quality control to ensure durability and reliability in pressurized cooling systems. Warranty coverage details should be confirmed at the time of purchase, as they may vary by distributor or retailer.