Dorman 603-178 Washer Fluid Reservoir - Front

Washer Fluid Reservoir for OE-Style Replacement

This Dorman washer fluid reservoir is a direct replacement for select front washer systems that need a durable, properly fitting fluid tank. Built from plastic and supplied with a reservoir cap and mounting bracket, it addresses common reservoir failures on applications such as the 2000-2005 Buick LeSabre, 2000-2005 Cadillac DeVille, 2000-2005 Pontiac Bonneville, and 2001-2003 Oldsmobile Aurora.

• Brand: Dorman
• Part number: 603-178
• Plastic reservoir construction
• White finish for OE-style appearance
• Mounting bracket included
• Reservoir cap included
• Manufactured for underhood heat and engine vibration resistance
• Tested for fit and performance on specific vehicle applications

Detailed Product Overview

Dorman 603-178 is a replacement washer fluid reservoir engineered for front-mounted windshield washer systems. It is built to match the original application requirements and is tested to help ensure proper fitment and function on the listed vehicles. This part cross-references OE number 12487598 for the same application. For buyers searching for a washer fluid reservoir for 2000-2005 Buick LeSabre front, 2000-2005 Cadillac DeVille front with low fluid sensor, or 2000-2005 Pontiac Bonneville front with low fluid sensor, this reservoir provides a direct-fit service solution.

What This Part Helps Address

• Cracked or leaking washer fluid reservoir
• Broken reservoir mounting points or support issues
• Washer fluid loss from heat-related plastic deterioration
• Reservoir damage from engine vibration
• Missing or damaged reservoir cap

Installation Notes and Tips

Verify vehicle fitment by year, make, model, and sensor configuration before installation. Transfer any vehicle-specific components required by the application, and confirm the reservoir is seated securely in the included mounting bracket. Inspect washer hoses, pump connections, and the cap seal during replacement to help prevent leaks and maintain proper washer system operation.

Quality Assurance

Dorman manufactures this reservoir to withstand underhood heat and engine vibration, then tests it for fit and performance on specific vehicle applications. Part number 603-178 is built as an OE-style replacement for the listed front washer reservoir applications.