Motorad 274-192 Engine Coolant Thermostat

Engine Cooling Thermostat for BMW Applications

Motorad Standard 274-192 is a 192°F engine coolant thermostat built for BMW cooling systems that call for OE-spec temperature control. It uses OEM-quality materials and manufacturing processes, with a copper case and wax compound for quick reaction to coolant temperature changes.

This thermostat is a direct-fit option for select BMW 320i, 323i, 323is, 323ti, 328i, 328is, 525i, 528i, and M3 applications, including 1997-2000 BMW Z3 coverage. The Motorad 274-192 is built to match the original thermostat temperature and housing dimensions used in these vehicles.

Key Features

• 192°F start-to-open temperature for OE-specified cooling control
• Copper case and wax compound for responsive temperature regulation
• Standard thermostat design for BMW cooling system service
• Offset design with air relief valve where applicable
• OEM-style seals included where applicable
• Sealing flange outside diameter: 2.64 in.
• Height between flanges: 1.4 in.
• Bypass diameter: 1.30 in.
• Bypass length: 1.02 in.
• Flange thickness: 0.05 in.

Detailed Description

Motorad Standard line thermostats are built for service replacement in cooling systems that require consistent temperature regulation and OE-style fitment. Part number 274-192 is engineered to open at 192°F, helping maintain the factory operating range specified for many BMW engines. The copper case and wax element are selected for fast response as coolant temperature changes, while the offset design and air relief valve support proper coolant flow and system bleeding where applicable. This part cross-references Gates 27492 for the same application.

Use Motorad 274-192 when servicing BMW 320i, 325i, 325is, 525i, M3, and Z3 cooling systems that call for a 192°F thermostat. It is also listed for BMW 323i, 323is, 323ti, 328i, and 328is applications across the model years shown below.

What It Helps Address

• Engine running too cool or too warm from a worn thermostat
• Slow warm-up after cold starts
• Temperature fluctuation caused by sticking thermostat operation
• Cooling system service on BMW engines with OE 192°F specification
• Restoration of factory coolant flow control after thermostat failure

Installation Notes and Tips

Verify the OE thermostat temperature and housing dimensions before installation. Inspect the mating surfaces, bypass passages, and coolant condition during service. Gasket or seal is not included, and an installation tool is not included. Because this thermostat uses an offset design and air relief valve where applicable, follow the vehicle service procedure for coolant bleeding after installation.

• Fits 1991-1995 BMW 525i, N/A
• Fits 1992-1995 BMW 325i, N/A
• Fits 1992-1993 BMW 325is, N/A
• Fits 1993-1995 BMW 320i, N/A
• Fits 1994-1999 BMW M3, N/A
• Fits 1996-1999 BMW 328i, N/A
• Fits 1996-1999 BMW 328is, N/A
• Fits 1996 BMW 528i, N/A
• Fits 1997-2000 BMW Z3, N/A
• Fits 1997 BMW 323i, N/A
• Fits 1998 BMW 323i, N/A
• Fits 1998-1999 BMW 323is, N/A
• Fits 1999 BMW 323i, N/A
• Fits 1999 BMW 323ti, N/A
• Fits 1999 BMW 528i, N/A
• Fits 2000 BMW 323ti, N/A

Quality Assurance

Motorad manufactures this thermostat with OEM-quality materials and safety standards as an OE supplier. The Standard product line focuses on OE-style replacement parts built to factory specifications and processes for dependable cooling system service.