What Causes White Smoke from the Exhaust Pipe of a BMW 3 Series?

[DelAlex]

The reasons for white smoke from the exhaust pipe of a BMW 3 Series are: 1. The engine block temperature is too low, leading to poor fuel atomization during cold starts; 2. Poor-quality gasoline with excessive water content, accompanied by poor acceleration, though the coolant level remains normal; 3. Continuous white smoke accompanied by a drop in coolant level may indicate a burnt cylinder head gasket, allowing water from the cooling system to enter the combustion chamber—the cylinder head gasket should be replaced; 4. Incorrect valve and fuel injection timing. The BMW 3 Series is a mid-size car under the BMW brand. Taking the 2021 BMW 3 Series Facelift 320i Sport Edition as an example, it is powered by a 2.0L inline four-cylinder turbocharged engine with a maximum power of 115kW and a maximum torque of 250Nm, paired with an 8-speed automatic transmission, and features rear-wheel drive.