Dorman Front Washer Fluid Reservoir for Select Ford/Mercury (1995–2011) — Direct-Fit, Durable Molded

The Dorman 603-057 front washer fluid reservoir is a direct-fit replacement reservoir built to restore proper washer fluid storage and function for select Ford, Mazda and Mercury models.

If your original washer fluid tank has cracked, leaked, or failed from underhood heat and vibration, this Dorman reservoir offers a like-for-like replacement engineered to match the factory fit and routing. Manufactured from durable materials and backed by Dorman's product expertise, the 603-057 is intended for specific model years of Ford Explorer, Ranger, F-100, Explorer Sport Trac, Mercury Mountaineer, and several Mazda B-series trucks. Before ordering, verify trim and fitment in the vehicle garage tool to ensure compatibility with your precise year and configuration.

Which vehicles will this Dorman reservoir fit?

This replacement is designed for a defined list of Ford, Mercury, and Mazda vehicles produced in the mid-1990s through early 2010s. It replicates the original mounting points and fluid connections for those specified applications to simplify installation.

• Ford Explorer (1995–2001), Explorer Sport Trac (2001–2005)
• Ford Ranger and F-100 Ranger models across 1995–2011 ranges (select years)
• Mazda B2300/B2500/B3000/B4000 model years included in product fitment
• Mercury Mountaineer (1997–2001)

How does this part hold up against heat and vibration?

The reservoir is molded from resilient materials chosen to tolerate underhood temperatures and vibrations that commonly cause older tanks to crack. Dorman engineers design the replacement to resist the same stresses that led to failure in original units.

• Durable molded plastic resists cracking and warping
• Reinforced mounting areas preserve secure attachment under vibration
• Factory-style hose and pump openings match original locations

What’s involved in replacing the failed washer reservoir?

Installation is straightforward for anyone comfortable with basic automotive work: drain remaining fluid, disconnect the washer pump and hoses, unfasten the mounting hardware, and swap in the new tank. Because the part matches original fitment, reassembly uses the same attachment points and connectors.

• Disconnect battery ground if needed for safety with electric pumps
• Remove retaining clips or bolts holding the old reservoir
• Transfer pump and grommets or install new ones as required
• Refill with washer fluid and check for leaks after installation

What should I check before buying this replacement reservoir?

Confirming exact year, make, model and trim is the fastest way to avoid fitment issues. Some vehicles within the same model range use different reservoir designs, so using the seller’s garage tool or cross-referencing OEM part numbers helps guarantee a correct match.

• Use the vehicle garage tool to verify year and trim compatibility
• Compare inlet/outlet locations and pump mounting style to your original
• Inspect surrounding brackets and fasteners for reuse or replacement

Who is this for: This Dorman 603-057 reservoir is aimed at DIY owners, independent mechanics, and fleet technicians who need a reliable, OEM-style replacement for a cracked or leaking washer tank on the listed Ford, Mazda and Mercury vehicles. It’s suitable for anyone seeking a durable aftermarket part that matches factory fit and function while simplifying repairs and restoring reliable washer-system service.

Features summary:

• Direct replacement designed to match original fit and function
• Engineered to resist heat- and vibration-related failure
• Durable construction for long service life
• Supported by Dorman product expertise and quality control
• Confirm fit via the vehicle garage tool before purchase