Could a faulty thermostat be the reason for my BMW 2 Series overheating in Pakistan?

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Could a faulty thermostat be the reason for my BMW 2 Series overheating in Pakistan?

My mechanic said the thermostat might be stuck closed because my BMW 220i engine overheats suddenly, especially on highways near Faisalabad. How does a thermostat failure lead to overheating?

Gari Specialist asked on 13 Jun 2025 13:22:29 pm

1 Answer

9 views |

Gari Master - on 13 Jun 2025 13:24:34 pm

Yes. The thermostat regulates coolant flow based on engine temperature. If it’s stuck closed, coolant cannot circulate to the radiator, causing the engine to overheat quickly. This is common in older o r high-mileage vehicles, especially when exposed to extreme heat o r inconsistent coolant maintenance.

Signs of faulty thermostat:

Sudden overheating after the engine warms up.

Temperature gauge jumping rapidly.

Heater blowing cold air despite engine heat.

Replacing the thermostat typically resolves the problem.