Nissens 996266 Engine Coolant Reservoir

Nissens 996266 Engine Coolant Reservoir

The Nissens 996266 engine coolant reservoir is a pressurized plastic expansion tank built for select Mini applications. It includes a cap and provides a 0.75L capacity for coolant expansion and level stabilization in the cooling system.

• Pressurized engine coolant reservoir for thermal system service
• Plastic construction for OE-style fit and function
• 0.75L capacity
• Cap included; high quality plastic cap type
• No mounting hardware, mounting bracket, or level sensor included
• Cross-references Nissens 996266 with Genuine 17137823626

Fitment Details

Compatible with select Mini Cooper, Mini Cooper Countryman, and Mini Cooper Paceman applications. Fits 2007-2015 Mini Cooper, N/A; fits 2011-2014 Mini Cooper Countryman, N/A; fits 2013-2016 Mini Cooper Paceman, N/A.

Use Nissens 996266 when replacing a cracked, leaking, or pressure-weak coolant reservoir on Mini Cooper cooling systems. This part number is also searched as 996266 for Mini Cooper and Mini Cooper Countryman cooling repairs.

What This Part Helps Address

• Coolant loss from a split or damaged reservoir
• Pressure loss in the cooling system
• Visible coolant seepage around the tank or cap area
• Low coolant level warnings caused by reservoir failure
• Heat-related cooling system instability

Installation Notes and Tips

Inspect the cap sealing surface, hoses, and surrounding cooling components before installation. Transfer coolant only after confirming the system is clean and free of cracks, and verify proper fill and bleed procedures for the vehicle. Because mounting hardware and a level sensor are not included, reuse or source those components as needed for the application.

Quality Assurance

Nissens develops thermal and engine efficiency components to consistent manufacturing standards, and this reservoir reflects that OE-focused approach. The 996266 is built as a direct replacement-style cooling component for select Mini models.