BMW 4 G22 Thermostats & Housings

The BMW G22 4 Series, particularly in M440i and M4 Competition trim, responds exceptionally well to targeted cooling upgrades, especially when pushed on track or running a tune. The factory charge air cooler on the B58 and S58 engines becomes a notable restriction under sustained load, and upgrading to a unit from Mishimoto or Wagner Tuning dramatically reduces heat soak and keeps intake temps consistent lap after lap. For the water-to-air intercooler system on the S58, the Evolve Automotive or BMS upgraded heat exchanger cores are widely respected choices that integrate cleanly with OEM mounting points. Radiator upgrades from CSF Cooling are particularly popular on the G22 chassis, offering a direct-fit aluminum core with significantly increased cooling capacity over the stock plastic-tank unit. If you're running sticky tires or extended track sessions, upgrading the power steering cooler and adding an oil cooler thermostat bypass kit from Burger Motorsports will help maintain stable oil temperatures. Always flush and replace coolant with BMW's own blue OEM coolant when fitting any new cooling component - mixing fluid types on this chassis can cause corrosion issues in the aluminum cooling passages faster than most owners expect.