Beck Arnley 143-0731 Engine Coolant Thermostat

Engine Cooling Control for BMW Applications

Beck Arnley 143-0731 is an engine coolant thermostat built to match foreign nameplate OE specifications for form, fit, and function. It is specified at 192 degrees and is a direct-fit choice for BMW cooling system service where accurate temperature control matters.

Compatible With BMW 323Ci, Z3, 323is, 328is, M3, 328i, 528i, 318i, 318is, 318ti, 325i, 325is, 525i, 525iT, 535i, M5, 735i, 735iL, 325iX, 635CSi, 528e, 535is, M6, 325e, and 325es applications listed below.

• Beck Arnley part number 143-0731
• 192-degree engine coolant thermostat
• Housing not included
• Gasket/seal not included
• OE-style fitment for select BMW cooling systems

Detailed Product Overview

This thermostat helps regulate coolant flow so the engine reaches and maintains its intended operating temperature. Beck Arnley sources parts to OE specifications for foreign nameplate vehicles, giving you a replacement that follows the original form, fit, and function requirements for BMW cooling system repair. The 143-0731 thermostat is used across a wide range of BMW 3 Series, 5 Series, 7 Series, M models, and Z3 applications with 192-degree temperature calibration.

Vehicle Fitment

• Fits 2000 BMW 323Ci, N/A
• Fits 1999-2000 BMW Z3, N/A, alternate temperature; gasket/seal not included; temperature 192
• Fits 1997-2000 BMW Z3, N/A
• Fits 1998-1999 BMW 323is, N/A
• Fits 1996-1999 BMW 328is, N/A
• Fits 1995-1999 BMW M3, N/A
• Fits 1996-1998 BMW 328i, N/A
• Fits 1997-1998 BMW 528i, N/A
• Fits 1991-1995 BMW 318i, N/A
• Fits 1991-1995 BMW 318is, N/A
• Fits 1995 BMW 318ti, N/A
• Fits 1988-1995 BMW 325i, N/A
• Fits 1992-1995 BMW 325is, N/A
• Fits 1988-1990 BMW 325is, N/A
• Fits 1989-1995 BMW 525i, N/A
• Fits 1993 BMW 525iT, N/A
• Fits 1986-1993 BMW 535i, N/A, alternate temperature; gasket/seal not included; temperature 192
• Fits 1991-1993 BMW M5, N/A, alternate temperature; gasket/seal not included; temperature 192
• Fits 1988 BMW M5, N/A, alternate temperature; gasket/seal not included; temperature 192
• Fits 1986-1992 BMW 735i, N/A, alternate temperature; gasket/seal not included; temperature 192
• Fits 1988-1992 BMW 735iL, N/A, alternate temperature; gasket/seal not included; temperature 192
• Fits 1988-1991 BMW 325iX, N/A
• Fits 1986-1989 BMW 635CSi, N/A, alternate temperature; gasket/seal not included; temperature 192
• Fits 1986-1988 BMW 528e, N/A, alternate temperature; gasket/seal not included; temperature 192
• Fits 1988 BMW 535is, N/A, alternate temperature; gasket/seal not included; temperature 192
• Fits 1987-1988 BMW M6, N/A, alternate temperature; gasket/seal not included; temperature 192
• Fits 1986-1987 BMW 325e, N/A, alternate temperature; gasket/seal not included; temperature 192
• Fits 1986-1987 BMW 325es, N/A, alternate temperature; gasket/seal not included; temperature 192
• Fits 1985 BMW 325e, N/A, alternate temperature; from 10/85; gasket/seal not included; temperature 192

Common Cooling System Issues It Can Address

• Engine running too cool or taking too long to reach operating temperature
• Temperature fluctuations caused by a worn thermostat
• Cooling system service on BMW models with 192-degree thermostat specification
• Replacement of a thermostat that no longer opens and closes at the correct temperature
• Restoration of proper coolant flow control during routine BMW maintenance

Installation Notes and Tips

Verify the thermostat temperature rating before installation, since some listed BMW applications note alternate temperature requirements. Housing is not included, and gasket/seal is not included, so confirm the existing housing condition and use the correct sealing components for your application. Match the part to the exact BMW model and year listed above, including notes for alternate-temperature applications.

Quality Assurance

Beck Arnley parts are sourced to meet foreign nameplate OE specifications for form, fit, and function. The brand works with global sourcing partners to help ensure the replacement matches the original application requirements for BMW cooling system service.