Wahler Performance Thermostat - 75*C - M42, M50, M52, S50, S52

Product Details

Engineered to optimize thermal efficiency under severe competitive conditions, this Wahler 75°C (167°F) low-temperature thermostat is a critical cooling system modification for race-configured BMW powerplants. While the factory OEM variant activates at a street-biased 88°C, this motorsport-calibrated unit initiates full coolant loop routing significantly earlier. By lowering the mechanical opening threshold, it introduces maximum radiator heat-exchange efficiency much sooner in the thermal cycle, effectively building a buffer against catastrophic heat soak during prolonged track sessions.

Manufactured by OEM-tier supplier Wahler, this unit delivers uncompromised reliability and instantaneous mechanical response. It is designed to fit seamlessly into factory or upgraded aluminum thermostat housings, ensuring precise bypass control, stable block pressures, and maximum volumetric flow when managing high-RPM heat dissipation.

Technical & Engineering Specifications:

• Activation Temperature: 75°C (167°F) — Optimized for high-ambient track and endurance racing

• OEM Part Cross-Reference: 11537511580 (Replaces stock 88°C units)

• Construction: Heavy-duty brass and stainless steel internal spring matrix for high-vibration fatigue resistance

• Operation: Proportional thermal-wax element engineered for rapid cycling and anti-bind deployment

Prop 65 Warning

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Lifetime Replacement

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