Vemo V30-99-0186 Engine Coolant Thermostat

Engine Coolant Thermostat for Mercedes-Benz B200

The Vemo V30-99-0186 engine coolant thermostat is an OE-style replacement for the Mercedes-Benz B200. It is supplied with housing, seal, and sensor support in one Expert Kits+ package, helping restore proper coolant regulation for 2006-2011 Mercedes-Benz B200 models.

Built around an 87°C opening temperature, this thermostat assembly helps maintain stable engine operating temperature and supports consistent cooling system performance. The VEMO product line focuses on application-specific replacement parts, and this thermostat assembly follows that approach with the housing and related components matched for the listed vehicle fitment.

Key Features

• Part number: V30-99-0186
• Engine coolant thermostat assembly with housing
• Opening temperature: 87°C
• Includes seal
• Includes sensor
• Dimensions: 151 mm height, 135 mm length, 80 mm width
• OE-style fitment for Mercedes-Benz B200 applications

Detailed Product Overview

Vemo V30-99-0186 is an engine coolant thermostat designed for Mercedes-Benz B200 models from 2006 through 2011. The assembly is specified with housing, seal, and sensor support, making it a direct replacement option for cooling system service where the thermostat housing is serviced as a complete unit. The 87°C opening temperature helps regulate coolant flow at the factory-style operating range for the listed application. This part cross-references Mercedes-Benz OE numbers 266 203 05 75 and 266 203 07 75 for the same application.

Common Cooling System Issues It May Address

• Engine running cooler or warmer than expected
• Temperature fluctuations during normal driving
• Coolant flow control problems related to thermostat wear
• Leaks at the thermostat housing or seal area
• Faults tied to thermostat sensor-equipped housing assemblies

Installation Notes and Tips

Fits 2006-2011 Mercedes-Benz B200, N/A. Confirm the OE number, housing style, and sensor configuration before installation. Inspect the cooling system for contamination, damaged hoses, or degraded coolant before replacing the thermostat assembly. Proper bleeding of the cooling system after service is important to help prevent trapped air and inaccurate temperature control.

Quality Assurance

VEMO Expert Kits+ packages the needed thermostat-related components in one box for the listed application, supporting a complete service approach for the cooling system. Part number V30-99-0186 is built to match the specified Mercedes-Benz B200 fitment and OE reference numbers.