Stant 14188 Engine Coolant Thermostat

OE Type Thermostat for BMW Cooling Systems

Stant 14188 is an OE Type Thermostat built to match original equipment design and temperature control requirements. It opens at 185 degrees Fahrenheit and uses a stainless steel assembly for smooth operation in BMW cooling systems.

Compatible With select BMW 850Ci, 530i, 540i, 740i, 740iL, 750iL, 840Ci, and 850CSi applications, this thermostat is a direct-fit cooling system service part for vehicles that require OE temperature control. The Stant OE Type Thermostat line focuses on factory-style fit and dependable thermal regulation.

Key Features

• OE Type Thermostat design for factory-style replacement
• 185 Degrees Fahrenheit opening temperature
• Stainless steel assembly engineered for smooth performance
• Durable material construction for long service life
• Flange diameter: 3.29 in. with seal and without seal
• Bypass plate diameter: 1.7 in.
• Height from flange to bottom: 1.31 in.
• Height from flange to top of bridge: 1.27 in.

Detailed Description

Stant 14188 is an engine coolant thermostat designed around original equipment specifications for BMW cooling system service. The 185-degree calibration helps maintain the intended operating temperature range, while the stainless steel assembly supports consistent movement and smooth performance. With OE-style dimensions and durable construction, this thermostat is built for vehicles that require a precise replacement thermostat rather than a universal part.

This part number 14188 is a practical choice for BMW owners servicing cooling system temperature control on models such as the BMW 740i, BMW 740iL, and BMW 850Ci. It also applies to other listed BMW V8 and V12 applications that call for an OE temperature thermostat.

Common Cooling Issues It Can Address

• Engine running cooler or warmer than the specified thermostat temperature
• Delayed coolant warm-up after startup
• Temperature fluctuation caused by a worn thermostat assembly
• Cooling system service on BMW models requiring OE temperature control
• Replacement of a thermostat with sticking or inconsistent operation

Installation Notes and Tips

Verify the thermostat temperature rating and dimensions against the original part before installation. Inspect the thermostat housing, sealing surfaces, and coolant condition during service, and confirm the cooling system is properly bled after replacement. For BMW 530i, 540i, 740i, 740iL, 750iL, 840Ci, 850Ci, and 850CSi applications, match the OE-style thermostat specification to the vehicle’s cooling system requirements.

Quality Assurance

Stant OE Type Thermostat parts are built with original equipment design principles and durable materials. Part number 14188 uses a stainless steel assembly and OE-style construction to support consistent cooling system performance in the listed BMW applications.