Oil thermostat bypass • BMW 135i 335i & 435i | N54 N55 engine |

BMW N54, N55 and S55 engine oil cooler thermostat bypass valve.

These BMW turbo engines have a known issue of very high running temperature with very high oil temperature. Changing original oil thermostat to our oil thermostat  diverter valve will solve this problem .

Cheap and very efficient solution. Installation takes up to 5 minutes and can be done even on the street.

This bypass makes the oil temperature 10-20 deg C (20-40 deg F) lower than with stock oil thermostat. May take engine oil slightly longer to warm up.