Vaico V30-3971 Washer Fluid Reservoir

Mercedes-Benz Washer Fluid Reservoir Replacement

Restore proper windshield washer system function with this Vaico washer fluid reservoir, part number V30-3971. It is a direct-fit replacement for select Mercedes-Benz models, including E250, ML320, ML350, ML430, ML500, and ML55 AMG applications listed below.

VAICO product line components are built for OE-style replacement needs, making this reservoir a practical choice when the original tank is cracked, leaking, or no longer holding washer fluid. This Vaico V30-3971 washer fluid reservoir is cross-referenced to OE number 1638690820 for the same application.

Key Features

• Washer fluid reservoir for the windshield washer system
• OE-reference replacement for Mercedes-Benz applications
• Part number V30-3971 for catalog and fitment lookup
• Fits select Mercedes-Benz E250 and ML-Class models
• Designed for vehicles using OE no. 1638690820

Detailed Description

This washer fluid reservoir is used to store windshield washer fluid and supply it to the washer pump and spray system. When the reservoir is damaged, the washer system can lose fluid, run dry, or fail to deliver fluid to the windshield. The V30-3971 is listed for 2015-2016 Mercedes-Benz E250, 1998-2003 Mercedes-Benz ML320, 1999-2001 Mercedes-Benz ML430, 2000-2003 Mercedes-Benz ML55 AMG, 2002-2005 Mercedes-Benz ML500, and 2003-2005 Mercedes-Benz ML350. Search terms such as Mercedes-Benz washer fluid reservoir replacement and Mercedes-Benz windshield washer tank V30-3971 apply to this part.

What It Helps Fix

• Washer fluid leaking from a cracked or damaged reservoir
• Low washer fluid storage caused by a failed tank
• Washer spray loss from a reservoir that no longer holds fluid
• Warning lights or washer system issues related to fluid loss
• Poor windshield cleaning performance from an empty or leaking tank

Installation Notes and Tips

Verify OE number 1638690820 and match the vehicle application before installation. Inspect the washer pump, grommets, hoses, and cap condition during replacement so the new reservoir can seal and function correctly. Confirm fitment for your specific Mercedes-Benz E250 or ML-Class model using the part number V30-3971 and the vehicle listing above.

Quality Assurance

VAICO is used for OE-style replacement parts, and this reservoir is cataloged against the listed Mercedes-Benz applications for direct-fit selection.