Nissens 996271 Engine Coolant Reservoir

Engine Coolant Reservoir for Mercedes-Benz

This Nissens engine coolant reservoir is a direct-fit thermal management component for select Mercedes-Benz models. Built from plastic and supplied as a pressurized reservoir with cap, level sensor, and mounting bracket, it supports stable coolant expansion and system monitoring in demanding engine bay conditions.

Key Features

• Engine coolant reservoir by Nissens, part number 996271
• Plastic construction for OE-style fit and function
• Pressurized design with cap included
• Level sensor included for coolant monitoring
• Mounting bracket included for installation support
• 2.00L capacity
• Fits Mercedes-Benz G63 AMG, G550, G500, S350, S430, S500, S55 AMG, S65 AMG, and S600 applications

Detailed Description

Nissens 996271 is an engine coolant reservoir engineered for Mercedes-Benz cooling systems that require a pressurized expansion tank with integrated level sensing. The reservoir is made from plastic and includes a high-quality plastic cap, a level sensor, and a mounting bracket to match the needs of the original cooling layout. This part number 996271 is listed for 2000-2016 Mercedes-Benz applications, including G-Class and S-Class models such as the Mercedes-Benz G500, Mercedes-Benz G550, and Mercedes-Benz S500.

Nissens develops thermal and engine-efficiency components with a focus on consistent manufacturing quality and ongoing aftermarket coverage as vehicle technology changes. This reservoir is a practical replacement when the original tank shows age-related wear or when the coolant level monitoring system needs a serviceable replacement.

This part cross-references URO 2205000049 for the same application.

What It Helps Address

• Cracked or brittle coolant reservoir housing
• Coolant leaks from the expansion tank area
• Faulty coolant level sensor readings
• Damaged or missing reservoir cap
• Improper coolant expansion control in the cooling system

Installation Notes and Tips

Verify the reservoir shape, sensor connection, and mounting points against the original unit before installation. Transfer or connect all cooling system lines carefully, then refill and bleed the system according to Mercedes-Benz service procedures to remove trapped air. Confirm the cap seals properly and check for leaks after the engine reaches operating temperature.

Quality Assurance

Nissens positions this component within its Genuine Nissens Quality standard, with development and manufacturing focused on thermal system reliability and OE-style application coverage.