Vemo V15-99-2058 Engine Coolant Thermostat

Engine Cooling Control for Audi and Volkswagen

The Vemo V15-99-2058 engine coolant thermostat is built for precise coolant flow control in select Audi and Volkswagen applications. With an 87°C opening temperature and included seal, it supports stable operating temperature and reliable sealing in the cooling system.

Compatible With 2000-2006 Audi A8 Quattro, 2000-2004 Audi A6 Quattro, 2001-2003 Audi S8, 2002-2003 Audi S6, 2003-2004 Audi RS6, 2004-2006 Volkswagen Phaeton, and 2004-2007 Volkswagen Touareg.

Key Features

• Engine coolant thermostat with 87°C opening temperature
• Includes seal for the thermostat housing interface
• Compact dimensions: 70 mm height, 65 mm length, 58 mm width
• Vemo part number V15-99-2058 for direct catalog lookup
• Cross-reference part numbers include Gates 22687 and Walker Exhaust 14771

Product Details

VEMO V15-99-2058 is an aftermarket engine coolant thermostat for cooling system service on Audi A8 Quattro, Audi A6 Quattro, Audi RS6, Audi S6, Audi S8, Volkswagen Phaeton, and Volkswagen Touareg applications. The 87°C calibration helps regulate coolant circulation at the specified operating threshold, while the included seal supports a proper housing connection during replacement. The VEMO line is used for replacement cooling components that match the vehicle application requirements and service dimensions.

This part cross-references Gates 22687 and Walker Exhaust 14771 for the same application.

Common Cooling System Issues Addressed

• Engine running cooler or warmer than specified
• Temperature fluctuations during normal driving
• Thermostat sticking open or closed
• Coolant flow control problems after thermostat wear
• Sealing issues at the thermostat housing interface

Installation Notes and Tips

Verify the thermostat housing condition before installation and clean all sealing surfaces thoroughly. Confirm the 87°C specification and compare the removed part to Vemo V15-99-2058 before assembly. Follow the vehicle service procedure for coolant refill and bleeding to help prevent trapped air in the cooling system.

Quality Assurance

VEMO aftermarket cooling components are cataloged for direct-fit replacement use on the listed Audi and Volkswagen models. Confirm fitment by year, make, model, and engine cooling configuration before ordering.