Nissens 996277 Engine Coolant Reservoir

Nissens Engine Coolant Reservoir 996277

The Nissens 996277 engine coolant reservoir is a pressurized plastic expansion tank built for BMW cooling systems that require a 0.35L reservoir with a cap and mounting bracket. It is a direct-fit thermal management component for select BMW 550i, 650i, 750i, and X6 applications, including BMW 650i Gran Coupe and BMW 650i xDrive Gran Coupe models.

Key Features

• Pressurized engine coolant reservoir for stable cooling-system operation
• Plastic construction for OE-style fit and function
• 0.35L capacity
• Cap included
• Mounting bracket included
• No level sensor included
• Cross-references URO 17137647281 for the same application

Product Details

Nissens 996277 is part of Nissens Automotive’s thermal management range, developed for engine efficiency and cooling-system performance. This coolant reservoir is designed for BMW applications that use a pressurized expansion tank, and it supports proper coolant expansion and system pressure control in vehicles such as the BMW 550i, BMW 650i xDrive, and BMW 750Li xDrive. If you are replacing a cracked, leaking, or aging reservoir, this part number 996277 provides the correct reservoir format for the listed fitments.

Compatible With: Fits 2013-2019 BMW 650i Gran Coupe, N/A; Fits 2013-2019 BMW 650i xDrive Gran Coupe, N/A; Fits 2012-2018 BMW 650i, N/A; Fits 2012-2018 BMW 650i xDrive, N/A; Fits 2011-2017 BMW 550i GT xDrive, N/A; Fits 2011-2016 BMW 550i, N/A; Fits 2011-2016 BMW 550i xDrive, N/A; Fits 2010-2015 BMW 550i GT, N/A; Fits 2009-2015 BMW 750i, N/A; Fits 2010-2015 BMW 750i xDrive, N/A; Fits 2009-2015 BMW 750Li, N/A; Fits 2010-2015 BMW 750Li xDrive, N/A; Fits 2009-2014 BMW X6, N/A.

What It Helps Address

• Coolant loss from a cracked or leaking reservoir
• Pressure-related cooling system faults
• Low coolant level warnings caused by reservoir failure
• Heat management issues from an aging expansion tank
• Fitment problems when replacing the original BMW coolant reservoir

Installation Notes and Tips

Verify the reservoir shape, cap style, and mounting points against the original unit before installation. Inspect the cap, hoses, and surrounding cooling-system components for wear, and replace any damaged seals or brittle lines during service. Because this reservoir is pressurized, proper installation and a secure cap seal are important for maintaining cooling-system pressure.

Quality Assurance

Nissens develops and manufactures thermal and engine-efficiency components to consistent quality standards across its aftermarket range. Part number 996277 is built as a replacement coolant reservoir for the listed BMW applications and follows Nissens’ Genuine Nissens Quality approach.